−---
−title: Wiring Devices
−category: Electrical
−toc_depth: 3
−description: >
− When to use: Receptacles, switches, and related wiring devices rated 125V through 250V and 60A and below for commercial, institutional, and light-industrial interior and exterior applications. Covers device grade and quality, NEMA receptacle configurations, GFCI and AFCI protection, tamper-resistant and weather-resistant devices, USB and specialty receptacles, snap switches, occupancy and vacancy sensors, wall plates and finishes, and floor and poke-through devices, including device testing and installation.
−
− Not intended for: Branch-circuit overcurrent protection and panel-mounted GFCI/AFCI breakers (see [[sync/low-voltage-panelboards]]), the branch-circuit conductors and equipment grounding conductors feeding the devices (see [[sync/conductors-and-cables]]), the raceways, outlet boxes, and floor-box conduit systems beyond the device requirements stated here (see [[sync/raceways-and-conduit]]), lighting fixtures and integral fixture controls, networked or digital lighting-control systems and their relay panels, pin-and-sleeve and locking devices above 60A, low-voltage data and communications jacks, or devices in hazardous (classified) locations without application-specific modifications.
−---
−
−# Scope
−
−This standard covers the materials, ratings, configuration, installation, and field testing of wiring devices for low-voltage branch circuits rated 125V through 250V and 60A and below. Wiring devices include receptacles, attachment-plug outlets, snap (toggle and decorator) switches, ground-fault and arc-fault protective devices, occupancy and vacancy sensors, wall plates, and floor and poke-through outlet devices. Devices and their installation shall comply with NFPA 70 (National Electrical Code), principally Article 406 for receptacles, Article 404 for switches, 210.8 for ground-fault protection, and 210.12 for arc-fault protection, and shall be listed and labeled by a Nationally Recognized Testing Laboratory.
−
−Wiring devices are the most numerous, most visible, and most frequently handled electrical components in a building, and they are also the components most often value-engineered to failure. A receptacle is touched, plugged, and unplugged thousands of times over its life; a switch is actuated tens of thousands of times. The difference between a device that survives that duty cycle and one that loosens, overheats, or breaks is almost entirely a function of the device grade selected and the quality of the field termination. This standard treats device grade as a primary engineering decision rather than an afterthought, because the installed cost difference between grades is small relative to the cost of replacing failed devices in an occupied building.
−
−The branch circuit that supplies a device, including its conductors and equipment grounding conductor, is governed by [[sync/conductors-and-cables]]. The outlet box, raceway, and floor-box rough-in that house the device are governed by [[sync/raceways-and-conduit]]. Panel-mounted GFCI and AFCI breakers, where protection is provided at the panelboard rather than at the device, are governed by [[sync/low-voltage-panelboards]]. The equipment grounding connection that every device depends upon is governed by [[sync/grounding-and-bonding]]. This standard governs the device itself, its plate, and the requirements for terminating and testing it.
−
−This standard does not establish where devices are located, at what height they are mounted, or how circuits are assigned to them; those are design decisions shown on the contract drawings. Device locations, mounting heights, circuiting, and the assignment of switches to controlled loads shall be [[drawing: as indicated on the electrical drawings]].
−
−# Referenced Standards
−
−Devices, materials, and installation shall comply with the latest adopted edition of the following standards and codes. Where the contract documents, the adopted building code, or a referenced standard conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.
−
−| Standard | Title |
−|----------|-------|
−| NFPA 70 | National Electrical Code (Articles 110, 210, 250, 404, 406, 314, 517, 680) |
−| NFPA 70E | Standard for Electrical Safety in the Workplace |
−| UL 498 | Attachment Plugs and Receptacles |
−| UL 943 | Ground-Fault Circuit-Interrupters |
−| UL 1699 | Arc-Fault Circuit-Interrupters |
−| UL 1472 | Solid-State Dimming Controls |
−| UL 773 | Plug-In, Locking Type Photocontrols for Use with Area Lighting (and UL 773A, Nonindustrial Photoelectric Switches) |
−| UL 1449 | Surge Protective Devices |
−| UL 514A | Metallic Outlet Boxes |
−| UL 514B | Conduit, Tubing, and Cable Fittings |
−| UL 514C | Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers |
−| NEMA WD 1 | General Color Requirements for Wiring Devices |
−| NEMA WD 6 | Wiring Devices — Dimensional Specifications |
−| NEMA WD 7 | Occupancy Motion Sensors Standard |
−| FS W-C-596 | Federal Specification, Connector, Plug and Receptacle, Electrical (device grade references) |
−| FS W-S-896 | Federal Specification, Switches, Toggle (device grade references) |
−
−# Submittals
−
−## Action Submittals
−
−Contractor shall submit the following for the Engineer's review prior to procurement. Devices shall not be ordered until the corresponding submittals are reviewed and returned.
−
−- Product data for each device type, grade, ampere and voltage rating, NEMA configuration, and color, including receptacles, switches, GFCI and AFCI devices, sensors, wall plates, and floor and poke-through assemblies
−- Documentation of listing and labeling for each device, identifying the applicable UL standard and, for receptacles, the NEMA WD 6 configuration designation
−- For occupancy and vacancy sensors, the sensing technology, coverage pattern and range, time-delay range, and the wiring topology (line-voltage versus low-voltage with a separate power pack)
−- For floor and poke-through devices, the assembly fire-resistance rating where installed in a fire-rated floor, the service openings provided (power, low-voltage), and the finish
−- A device color and finish schedule coordinating device color, plate material, and plate finish with the architectural finish schedule
−
−```datasheet
−label: Action Submittals Required
−type: checkbox
−options:
− - "Product data for each device type and grade"
− - "Listing/labeling documentation (UL standard and NEMA configuration)"
− - "Occupancy/vacancy sensor coverage and technology data"
− - "Floor / poke-through assembly data (fire rating, services, finish)"
− - "Device color and plate finish schedule"
−default: "Product data for each device type and grade"
−```
−
−## Closeout Submittals
−
−Contractor shall provide the following at substantial completion.
−
−- Field test reports for receptacle wiring verification and GFCI/AFCI functional testing, identifying any device replaced as a result of testing
−- Operation and maintenance data for occupancy/vacancy sensors and any programmable devices, including time-delay and sensitivity settings as left
−- Warranty documentation for devices carrying a manufacturer warranty
−- A record device schedule reflecting the as-installed device types, grades, and colors by area
−
−# Quality Assurance
−
−## Installer Qualifications
−
−Wiring devices shall be installed by electricians experienced in device termination and supervised by a licensed electrical contractor. Termination quality is the single largest field variable affecting device reliability; personnel shall be familiar with the correct preparation and torque of the terminal type specified for each device.
−
−## Listing and Labeling
−
−Every wiring device shall be listed and labeled by a Nationally Recognized Testing Laboratory for its specific use. Receptacles and attachment plugs shall be listed to UL 498. Ground-fault circuit-interrupter devices shall be listed to UL 943. Arc-fault devices shall be listed to UL 1699. Solid-state dimmers shall be listed to UL 1472. A device shall not be installed in any application beyond the ratings and use for which it is listed.
−
−## Source Limitations
−
−All wiring devices of a given type and grade on a project should be furnished by a single manufacturer so that color, plate fit, and replacement-part interchangeability are consistent throughout the building. A receptacle from one manufacturer and a plate from another frequently do not align cleanly even when both meet NEMA WD 6 dimensions; sourcing devices and plates as a coordinated set avoids visible misalignment.
−
−## Regulatory Requirements
−
−Devices and their installation shall comply with all applicable federal, state, and local codes, including the adopted edition of NFPA 70 and any state or local amendments. Work shall be subject to inspection by the Authority Having Jurisdiction.
−
−# Environmental and Service Conditions
−
−The location of a device dictates several mandatory device characteristics under the NEC, independent of any designer preference. A device in a damp or wet location shall be weather-resistant and shall be protected by an appropriate cover; a device in a location listed in NEC 406.12 shall be tamper-resistant; a device in a location listed in NEC 210.8 shall have ground-fault protection. These location-driven requirements are not optional and are addressed in the product sections that follow. The selection below records the governing condition for each device group so that the correct device characteristics are carried through procurement.
−
−```datasheet
−label: Device Location Class
−type: select
−options:
− - "Indoor dry — general interior, climate-controlled"
− - "Indoor damp — unconditioned interior, high-humidity areas"
− - "Outdoor / wet — exposed to weather or washdown"
− - "Mixed (per drawings by area)"
−default: "Indoor dry — general interior, climate-controlled"
−```
−
−# Device Grade and Quality
−
−The grade of a wiring device, established by its construction and by the durability and retention tests it passes under UL 498, is the primary determinant of how long the device will function in service. Grade is not a marketing term; it corresponds to measurable differences in contact material, contact pressure, strap thickness, and terminal robustness, and historically to the federal device-grade references FS W-C-596 for receptacles and FS W-S-896 for switches. Specifying grade explicitly, by area, is the most consequential decision in this standard.
−
−## Receptacle Grade
−
−```datasheet
−label: Receptacle Grade
−type: radio
−options:
− - "Residential / general use"
− - "Commercial / specification grade"
− - "Heavy-duty / industrial grade"
− - "Hospital grade (UL 498, green dot)"
−default: "Commercial / specification grade"
−```
−
−Commercial (specification) grade is the correct default for the great majority of commercial, institutional, and tenant-improvement work. It provides substantially higher contact retention and strap durability than residential-grade devices at a small premium, and it is the grade that survives the plug-and-unplug cycling of an occupied building without developing loose, heat-generating connections. Residential/general-use grade should be limited to dwelling units and light-duty locations where cost governs and duty is low. Heavy-duty/industrial grade should be specified for shops, kitchens, equipment rooms, and any location subject to heavy or abusive plug cycling. Hospital-grade receptacles, identified by the green dot required under UL 498 and tested to additional grounding-reliability, assembly-integrity, and abrupt-removal requirements, shall be used in patient care spaces and wherever else required by NEC Article 517, and may be specified for other critical-equipment locations where maximum grounding reliability is required.
−
−## Switch Grade
−
−```datasheet
−label: Switch Grade
−type: radio
−options:
− - "Residential / general use"
− - "Commercial / specification grade"
− - "Heavy-duty / industrial grade"
−default: "Commercial / specification grade"
−```
−
−Switch grade follows the same logic as receptacle grade. A specification-grade switch is rated for a far greater number of mechanical operations than a residential switch and is the appropriate default for commercial spaces, where a single switch may be actuated many times per day for decades.
−
−## Switch and Receptacle Ampere Rating
−
−```datasheet
−label: General-Purpose Device Ampere Rating
−type: radio
−unit: A
−options:
− - "15 A"
− - "20 A"
−default: "20 A"
−```
−
−A 20A device is the default for commercial branch circuits, which are commonly wired as 20A circuits; the 20A receptacle accepts both 15A and 20A attachment plugs and is required where a single receptacle is the only outlet on a 20A circuit. A 20A switch is similarly preferred for commercial work because its higher contact rating extends life under inductive lighting loads. The device ampere rating shall not exceed the branch-circuit rating, and a receptacle's rating shall be coordinated with the circuit per NEC 210.21(B).
−
−# Receptacles and NEMA Configurations
−
−The physical configuration of a receptacle — the arrangement of its slots and ground contact — is standardized by NEMA WD 6, which assigns a designation (for example 5-15R, 5-20R, 6-20R, L5-30R) encoding the voltage class, the ampere rating, and whether the device is straight-blade or locking. Specifying the correct NEMA configuration is what guarantees that the receptacle physically accepts only the intended attachment plug and rejects others, which is itself a safety function. Configurations shall be specified by their NEMA WD 6 designation, never by appearance or by a manufacturer catalog number.
−
−## General-Purpose Receptacle Configuration
−
−```datasheet
−label: General-Purpose Receptacle NEMA Configuration
−type: select
−options:
− - "5-15R — 125V, 15A, straight blade"
− - "5-20R — 125V, 20A, straight blade"
− - "6-15R — 250V, 15A, straight blade"
− - "6-20R — 250V, 20A, straight blade"
− - "L5-20R — 125V, 20A, locking"
− - "L5-30R — 125V, 30A, locking"
− - "L6-20R — 250V, 20A, locking"
− - "L6-30R — 250V, 30A, locking"
−default: "5-20R — 125V, 20A, straight blade"
−```
−
−The 5-20R, 125V 20A straight-blade configuration is the workhorse of commercial construction and is the correct default for general convenience receptacles on 20A circuits. The 5-15R is appropriate for 15A circuits and residential general use. The 6-series 250V configurations serve dedicated 240V single-phase equipment. Locking (twist-lock) configurations shall be specified where an accidental disconnection would be hazardous or disruptive — portable equipment, temporary power, rooftop and mechanical equipment, and stage or audiovisual power — because the locking blade prevents the plug from being pulled out under load or vibration.
−
−## Receptacle Configuration — Single vs. Duplex
−
−```datasheet
−label: Receptacle Device Type
−type: radio
−options:
− - "Duplex (two receptacles per device)"
− - "Single (one receptacle per device)"
− - "Quad (four receptacles, two ganged duplexes)"
−default: "Duplex (two receptacles per device)"
−```
−
−A duplex receptacle is the default general-purpose device. A single receptacle shall be used where a dedicated piece of equipment requires the entire circuit, where a single receptacle is installed on an individual branch circuit and must therefore be rated not less than the circuit per NEC 210.21(B)(1), or where codes restrict the outlet to one device. Quad assemblies are appropriate at workstations and equipment racks where outlet density is high.
−
−## Controlled and Marked Receptacles
−
−```datasheet
−label: Controlled Receptacle Marking (energy code)
−type: radio
−options:
− - "Not required"
− - "Automatically controlled receptacles marked per energy code"
−default: "Not required"
−```
−
−Where the adopted energy code requires that a portion of receptacles be automatically controlled (switched off when a space is unoccupied), the controlled receptacles shall be permanently marked with the distinctive symbol that identifies them as controlled, so that occupants do not connect equipment requiring continuous power to a controlled outlet. The controlled and uncontrolled receptacles, and which are switched, shall be [[drawing: as indicated on the drawings]].
−
−# Ground-Fault and Arc-Fault Protection
−
−Ground-fault and arc-fault protection may be provided at the device (a GFCI or AFCI receptacle) or upstream at the panelboard (a GFCI or AFCI breaker, per [[sync/low-voltage-panelboards]]). Both satisfy the code requirement; the choice affects cost, the extent of wiring protected, and the location at which a tripped device is reset. This standard governs the device-level option.
−
−## Ground-Fault Circuit-Interrupter (GFCI) Protection
−
−NEC 210.8 requires ground-fault protection for personnel on receptacles in a broad and expanding set of locations, including bathrooms, kitchens and other areas with sinks or food-preparation provisions, garages, outdoors, rooftops, crawl spaces, and unfinished basements, and the protected range now extends through 250V at the specified locations. Where a receptacle is in a location listed in NEC 210.8, it shall be GFCI-protected by a listed GFCI device.
−
−```datasheet
−label: GFCI Protection Method (where 210.8 applies)
−type: radio
−options:
− - "GFCI receptacle at the point of use"
− - "GFCI breaker at the panelboard (protects branch-circuit wiring)"
− - "First GFCI receptacle feeding downstream protected receptacles"
−default: "GFCI receptacle at the point of use"
−```
−
−A GFCI receptacle at the point of use is the common default because it protects the connected equipment, is reset locally, and isolates a trip to a single outlet. A GFCI breaker at the panelboard additionally protects the branch-circuit wiring and is preferred where the wiring is exposed to damage or where local reset is impractical. A single upstream GFCI receptacle feeding downstream conventional receptacles on its load terminals is permitted and economical, but every downstream receptacle so protected shall be marked "GFCI Protected" and "No Equipment Ground" only where applicable, and the downstream extent shall be clear so that a future trip can be diagnosed.
−
−### Class A GFCI Devices
−
−GFCI devices for personnel protection shall be Class A, listed to UL 943, which trips on a ground-fault current of 6 mA and does not trip below 4 mA. Class A is the personnel-protection class; devices of other classes, which trip at higher currents, protect equipment but not people and shall not be substituted where personnel protection is required.
−
−### GFCI Self-Test and End-of-Life
−
−GFCI devices shall incorporate the self-test and end-of-life functions required by the current edition of UL 943. A GFCI that can no longer protect shall deny power or provide a distinct indication rather than continuing to pass power as an ordinary receptacle; this addresses the long-standing field problem of GFCI devices that silently lose protection while still energizing connected loads.
−
−## Arc-Fault Circuit-Interrupter (AFCI) Protection
−
−NEC 210.12 requires combination-type arc-fault protection on 120V, 15A and 20A branch circuits supplying outlets in dwelling units, dormitories, guest rooms, and similar residential occupancies. AFCI protection may be provided by a combination AFCI breaker at the panelboard or, where permitted, by an outlet-branch-circuit AFCI device at the first outlet.
−
−```datasheet
−label: AFCI Protection (where 210.12 applies)
−type: radio
−options:
− - "Not required (non-residential occupancy)"
− - "Combination AFCI breaker at panelboard"
− - "Outlet-branch-circuit AFCI device at first outlet"
−default: "Not required (non-residential occupancy)"
−```
−
−A combination AFCI breaker at the panelboard is the cleanest method because it protects the entire branch circuit including the homerun, and it is the default where AFCI is required. The outlet AFCI device is used where an existing branch-circuit homerun cannot be protected at the panel. AFCI is not generally required in commercial occupancies; the Engineer may nonetheless specify it for areas with concentrated plug loads and extension-cord use as a proactive fire-prevention measure.
−
−## Dual-Function Devices
−
−```datasheet
−label: Dual-Function (AFCI + GFCI) Device
−type: radio
−options:
− - "Not used"
− - "Dual-function device where both AFCI and GFCI are required"
−default: "Not used"
−```
−
−A dual-function device provides both Class A GFCI and AFCI protection in a single receptacle and is efficient at the first outlet of a residential circuit that requires both, avoiding two stacked devices.
−
−# Tamper-Resistant and Weather-Resistant Devices
−
−Tamper resistance and weather resistance are independent device characteristics, each required by the NEC in its own set of locations, and a device may need to be both. They are not interchangeable and shall not be confused.
−
−## Tamper-Resistant (TR) Receptacles
−
−NEC 406.12 requires that 15A and 20A, 125V and 250V nonlocking receptacles be listed tamper-resistant in a wide range of dwelling and now non-dwelling locations, including guest rooms, child care facilities, and many educational, health-care, and assembly spaces. A tamper-resistant receptacle incorporates an internal shutter mechanism that opens only when both contacts are engaged simultaneously by a plug, preventing the insertion of a single foreign object into one slot.
−
−```datasheet
−label: Tamper-Resistant (TR) Receptacles
−type: radio
−options:
− - "TR where required by NEC 406.12"
− - "TR for all 15A/20A 125V receptacles (project-wide)"
− - "Not required (no 406.12 locations)"
−default: "TR where required by NEC 406.12"
−```
−
−Specifying tamper-resistant receptacles project-wide for all standard 15A and 20A 125V outlets is a defensible simplification that eliminates the risk of a non-TR device being installed in a location that requires TR, at negligible added cost; the default here follows code minimum but project-wide TR is a common and reasonable election.
−
−## Weather-Resistant (WR) Receptacles
−
−NEC 406.9 requires that receptacles installed in damp or wet locations be listed weather-resistant. A weather-resistant receptacle uses materials and a construction that withstand exposure to moisture, humidity, and temperature extremes without the contact corrosion and material degradation that would occur in an ordinary device.
−
−```datasheet
−label: Weather-Resistant (WR) Receptacles
−type: radio
−options:
− - "WR at all damp and wet locations (NEC 406.9)"
− - "Not applicable (no damp/wet receptacle locations)"
−default: "WR at all damp and wet locations (NEC 406.9)"
−```
−
−A receptacle that is in a wet or damp location and also in a location listed in NEC 406.12 shall be both weather-resistant and tamper-resistant. A combined WR/TR device satisfies both requirements in one part.
−
−## In-Use (Bubble) Covers for Wet Locations
−
−Receptacles in a wet location shall be provided with an enclosure that is weatherproof whether or not a plug is inserted, in accordance with NEC 406.9(B). This requires an "in-use" or "bubble" cover for any wet-location receptacle that may have a cord connected while exposed to weather, because a flat weatherproof cover is weatherproof only when closed and open to the weather whenever a cord is plugged in.
−
−```datasheet
−label: Wet-Location Receptacle Cover
−type: radio
−options:
− - "In-use (bubble) cover, weatherproof with plug inserted"
− - "Flush/flat weatherproof cover (damp location, no continuous cord use)"
−default: "In-use (bubble) cover, weatherproof with plug inserted"
−```
−
−# USB and Specialty Receptacles
−
−## USB-Integrated Receptacles
−
−```datasheet
−label: USB-Integrated Receptacles
−type: radio
−options:
− - "Not used"
− - "Provided at designated locations (duplex receptacle with integral USB)"
−default: "Not used"
−```
−
−A USB-integrated receptacle combines a standard duplex receptacle with one or more integral USB charging ports. Where specified, the device shall be listed and the USB port types and output rating shall be coordinated with current charging standards. USB-integrated receptacles should be specified only at locations where charging convenience is part of the program (hospitality, conference, lobby, and similar), because the integral electronics have a shorter service life than the receptacle contacts and may date the installation as charging standards evolve. USB receptacles shall not be relied upon where a code requirement (GFCI, TR, WR) applies unless the specific device is listed for that requirement.
−
−## Surge-Suppression Receptacles
−
−```datasheet
−label: Surge-Suppression Receptacle
−type: radio
−options:
− - "Not used"
− - "Provided at designated sensitive-equipment locations"
−default: "Not used"
−```
−
−A surge-suppression receptacle incorporates a Type 3 point-of-use surge protective device listed to UL 1449 and provides localized transient protection for connected electronic equipment. It supplements, and does not replace, the service- or panel-level surge protection specified in [[sync/low-voltage-panelboards]]. A surge-suppression receptacle shall include a status indicator showing whether its protection remains functional, because a depleted suppressor that still passes power gives a false sense of protection.
−
−# Switches
−
−A snap switch controls a lighting or other load by interrupting one or more conductors. The switch type is determined by how many control points the load is operated from, and the actuator style is a finish decision. Switch ratings, like receptacle ratings, are governed by UL 498 and the device grade.
−
−## Switch Type
−
−```datasheet
−label: Switch Type (control points)
−type: select
−options:
− - "Single-pole (one control location)"
− - "Three-way (two control locations)"
− - "Four-way (three or more control locations)"
− - "Double-pole (switches both ungrounded conductors of a 240V load)"
− - "Momentary / centre-off (low-voltage or pilot control)"
−default: "Single-pole (one control location)"
−```
−
−A single-pole switch controls a load from one location and is the default. Three-way switches are used in pairs to control one load from two locations; four-way switches are inserted between a pair of three-ways to add control locations. A double-pole switch interrupts both ungrounded conductors of a 240V single-phase load. The switch type at each location is determined by the control scheme and shall be [[drawing: as indicated on the drawings]]. Where the grounded (neutral) conductor is required at switch locations by NEC 404.2(C) to supply electronic switches and sensors, the neutral shall be provided in the switch box.
−
−## Actuator Style
−
−```datasheet
−label: Switch Actuator Style
−type: radio
−options:
− - "Toggle"
− - "Decorator (paddle / rocker)"
−default: "Decorator (paddle / rocker)"
−```
−
−Actuator style is a finish coordination decision and shall match the device family selected for the project so that switches, dimmers, and sensors share a consistent appearance and a common plate opening. Decorator (paddle) style is the prevailing commercial standard and coordinates with the decorator opening used by most sensors and electronic controls; toggle is selected where a traditional appearance is desired. Mixing toggle and decorator styles within a space requires different plates and looks inconsistent.
−
−## Pilot-Light and Illuminated Switches
−
−```datasheet
−label: Pilot-Light / Illuminated Switches
−type: radio
−options:
− - "Not used"
− - "Pilot-light switch where load status indication is required"
− - "Illuminated (lighted-handle) switch for locating in the dark"
−default: "Not used"
−```
−
−A pilot-light switch illuminates when the controlled load is energized and is used where the load is not visible from the switch (exhaust fans, remote equipment). An illuminated-handle switch glows when the load is off so the switch can be found in a dark room. The two are opposite in behavior and shall not be confused on the drawings.
−
−## Dimmer Switches
−
−```datasheet
−label: Dimmer Switches
−type: radio
−options:
− - "Not used"
− - "Solid-state dimmers at designated locations (UL 1472)"
−default: "Not used"
−```
−
−Where dimming is provided by a wall-box device rather than by a networked lighting-control system, the dimmer shall be a solid-state dimmer listed to UL 1472 and shall be compatible with the connected load type. Dimmer-load compatibility is the most common dimming failure: a dimmer shall be listed and rated for the specific load technology it controls (for example, LED drivers of the forward- or reverse-phase type used on the project), and the dimmer's load rating shall be derated for gang installation where adjacent dimmers share a multigang box, because grouped dimmers cannot dissipate full rated heat. The load type and dimming method shall be [[drawing: as indicated on the lighting drawings]].
−
−# Occupancy and Vacancy Sensors
−
−An occupancy sensor turns a load on automatically when it detects presence and off after an interval of no detection; a vacancy sensor turns a load off automatically but requires a manual on. Vacancy (manual-on) control is required by many energy codes in specific space types precisely because it does not energize lighting in a briefly entered or daylit space. The distinction between occupancy and vacancy operation is a code-driven control decision, not a hardware difference alone, and shall be specified per space. Sensors shall meet the testing requirements of NEMA WD 7.
−
−## Sensor Control Mode
−
−```datasheet
−label: Sensor Control Mode
−type: radio
−options:
− - "Occupancy (auto-on, auto-off)"
− - "Vacancy (manual-on, auto-off)"
− - "Selectable (field-configurable occupancy or vacancy)"
−default: "Vacancy (manual-on, auto-off)"
−```
−
−Vacancy (manual-on) control is the default because it complies with the prevailing energy-code requirement for many enclosed spaces and prevents lighting from energizing when a space is entered briefly or is adequately daylit. Occupancy (auto-on) control is appropriate for spaces where hands-free operation is required for safety or convenience, such as corridors, restrooms, and stairwells. The required mode for each space shall be [[drawing: as indicated on the lighting-control drawings]].
−
−## Sensing Technology
−
−```datasheet
−label: Sensor Technology
−type: radio
−options:
− - "Passive infrared (PIR)"
− - "Ultrasonic"
− - "Dual-technology (PIR + ultrasonic)"
−default: "Dual-technology (PIR + ultrasonic)"
−```
−
−Passive infrared sensors detect the moving heat of an occupant and require an unobstructed line of sight; they resist false-on but can miss minor motion behind obstructions. Ultrasonic sensors detect motion by Doppler shift of an emitted signal and see around obstructions and into partitioned spaces, but are more prone to false triggering from air movement. Dual-technology sensors require both signals to turn on and either signal to hold on, combining the reliability of both and minimizing both false-on and false-off; dual-technology is the default for enclosed offices, conference rooms, and any space where a missed occupant or a nuisance activation is disruptive. Single-technology PIR is appropriate and economical for simple spaces with full line of sight; ultrasonic suits restrooms and spaces with stalls or partitions.
−
−## Sensor Mounting
−
−```datasheet
−label: Sensor Mounting
−type: radio
−options:
− - "Wall-box (replaces wall switch)"
− - "Ceiling-mounted (with separate power pack)"
−default: "Wall-box (replaces wall switch)"
−```
−
−A wall-box sensor replaces the wall switch and powers directly from the switch leg; it suits small enclosed rooms with a clear view from the switch location. A ceiling-mounted sensor provides 360-degree coverage of larger or irregular spaces and connects through a low-voltage power pack that switches the line-voltage load. Ceiling sensors require a low-voltage class-2 connection to the power pack; that wiring and the power-pack location shall be coordinated with [[sync/raceways-and-conduit]].
−
−## Time Delay
−
−```datasheet
−label: Sensor Off Time-Delay
−type: range
−unit: minutes
−options:
− min: 1
− max: 30
− setpoints: [1, 5, 10, 15, 20, 30]
−default: 15
−```
−
−The off time-delay is the interval the sensor waits after the last detected motion before switching the load off. Too short a delay produces nuisance shut-offs while a space is occupied but still; too long a delay wastes energy and may exceed the maximum the energy code allows. A delay of about 15 minutes balances occupant comfort against energy savings for typical office and conference spaces; the value shall be set within the limit imposed by the adopted energy code and adjusted in the field to suit the space.
−
−# Wall Plates and Finishes
−
−The wall plate is the most visible electrical component in a finished space and is also a coordination item with the architectural finishes. Plate material and color are finish decisions; the plate's fit and listing are quality decisions.
−
−## Wall Plate Material
−
−```datasheet
−label: Wall Plate Material
−type: select
−options:
− - "Thermoplastic / nylon (standard commercial)"
− - "Stainless steel (type 302/304)"
− - "Smooth metal (painted or anodized)"
− - "Weatherproof (gasketed, for damp/wet locations)"
−default: "Thermoplastic / nylon (standard commercial)"
−```
−
−Nylon thermoplastic plates are the commercial default: impact-resistant, color-stable, and inexpensive, and available in the standard device colors. Stainless steel plates are specified in kitchens, healthcare, and high-traffic or high-abuse areas where durability and cleanability govern, and where the architectural intent calls for a metal finish. Weatherproof gasketed plates are required at damp and wet locations and shall be coordinated with the in-use cover requirements for wet-location receptacles. Metal plates installed on a device shall be grounded through the device mounting strap, which requires that the device be properly grounded.
−
−## Wall Plate Size
−
−```datasheet
−label: Wall Plate Size
−type: radio
−options:
− - "Standard"
− - "Oversized / jumbo (covers rough openings and wall imperfections)"
−default: "Standard"
−```
−
−Standard plates are used throughout unless the rough opening or the wall finish condition requires an oversized plate to cover gaps. Oversized plates are commonly specified for masonry, existing-wall, and renovation conditions where the box opening cannot be cut cleanly.
−
−## Device and Plate Color
−
−```datasheet
−label: Device and Plate Color
−type: select
−options:
− - "White"
− - "Light almond"
− - "Ivory"
− - "Gray"
− - "Black"
− - "Brown"
− - "Red (designated emergency / critical-branch outlets)"
−default: "White"
−```
−
−Device and plate color is coordinated with the architectural finish schedule; white is the prevailing commercial default. Color also carries information: receptacles on the emergency or critical branch of an essential electrical system are commonly specified in red so that occupants can identify outlets that remain powered during a normal-power outage. Where color is used to designate a circuit type (red for emergency, or a distinct color for an isolated-ground or controlled receptacle), that convention shall be applied consistently and shall be [[drawing: as indicated on the drawings]]. Color identification of devices follows NEMA WD 1.
−
−# Floor and Poke-Through Devices
−
−Floor outlet devices bring power and low-voltage services to the interior of a space away from walls — open offices, conference tables, retail floors, and assembly spaces. They take two principal forms: a recessed floor box set in the slab, and a poke-through fitting that penetrates the structural floor to draw service from the ceiling space below. Both must address the fire-resistance rating of the floor they penetrate, and both must keep power and low-voltage services separated.
−
−## Floor Device Type
−
−```datasheet
−label: Floor Device Type
−type: radio
−options:
− - "Recessed floor box (set in slab)"
− - "Poke-through fitting (penetrates floor, fed from below)"
− - "Surface raceway floor box (poke-through with surface enclosure)"
−default: "Poke-through fitting (penetrates floor, fed from below)"
−```
−
−A poke-through fitting is the common solution for adding outlets in the open field of a finished floor over occupied space below, because it can be cored and installed without disturbing the slab reinforcement and draws service from the ceiling plenum below. A recessed floor box is set during slab construction and suits new construction where outlet locations are known before the pour. Floor device locations shall be [[drawing: as indicated on the drawings]] and coordinated with the structural slab and the furniture layout.
−
−## Fire-Resistance Rating
−
−Where a floor device penetrates a fire-rated floor assembly, the device assembly shall be listed and installed to restore the fire-resistance rating of the floor, in accordance with the listing of the poke-through or floor-box system and the firestopping requirements of the assembly. A poke-through fitting that penetrates a rated floor shall be a listed through-penetration firestop assembly; an ordinary cored hole with a fitting does not maintain the rating.
−
−```datasheet
−label: Floor Penetration Fire Rating to be Maintained
−type: select
−options:
− - "Non-rated floor (no rating to maintain)"
− - "1-hour rated floor assembly"
− - "2-hour rated floor assembly"
−default: "2-hour rated floor assembly"
−```
−
−The fire rating of the floor assembly the device penetrates is set by the building's fire-resistance design and shall be confirmed against the architectural and life-safety drawings; the device assembly shall carry a listing for that rating. Coordinate firestopping at the penetration with the project firestopping requirements.
−
−## Service Separation and Capacity
−
−```datasheet
−label: Floor Device Services
−type: checkbox
−options:
− - "Power (receptacles)"
− - "Low-voltage / data"
− - "Audiovisual"
−default: "Power (receptacles)"
−```
−
−A floor device that carries both power and low-voltage services shall maintain physical separation between the power and low-voltage compartments as required by the device listing and by NEC, so that the two systems do not share a common opening. The number of receptacles and the low-voltage capacity of the device shall be coordinated with the connected equipment.
−
−## Floor Device Finish
−
−```datasheet
−label: Floor Device Cover Finish
−type: select
−options:
− - "Brushed aluminum"
− - "Brass"
− - "Brushed stainless steel"
− - "Nonmetallic (for carpet/tile flush mount)"
−default: "Brushed aluminum"
−```
−
−The floor device cover is a visible architectural element and its finish shall be coordinated with the floor finish. Carpet, tile, and exposed-concrete floors each have a preferred cover and trim treatment; the cover shall be selected to suit the floor finish at each device location.
−
−# Testing
−
−Wiring devices receive no factory acceptance test of the type applied to assembled equipment; their meaningful verification happens in the field after installation, where wiring errors and defective terminations are found.
−
−## Receptacle Wiring Verification
−
−Every receptacle shall be tested after installation to confirm correct polarity, the presence and continuity of the equipment grounding connection, and the absence of reversed, open, or miswired connections, using a receptacle tester appropriate to the device type. A reversed hot-neutral, an open ground, or a bootleg ground is a latent hazard that is invisible until someone is shocked or equipment is damaged; this verification is mandatory and not a sampling exercise.
−
−```datasheet
−label: Receptacle Wiring Verification Scope
−type: radio
−options:
− - "100% of installed receptacles"
− - "Statistical sample with 100% verification of any group containing a failure"
−default: "100% of installed receptacles"
−```
−
−## GFCI Functional Test
−
−Every installed GFCI device, and every receptacle protected by an upstream GFCI device or breaker, shall be functionally tested. The test shall confirm that the device trips when its test button is operated and, for the protected downstream outlets, that power is interrupted at the protected outlet when the upstream GFCI is tripped. A GFCI that does not trip on its test function, or that trips but does not de-energize its load and downstream outlets, shall be replaced.
−
−```datasheet
−label: GFCI Functional Test
−type: checkbox
−options:
− - "Test-button trip of each GFCI device"
− - "Verify downstream protected outlets de-energize on trip"
− - "Verify reset restores power"
− - "Verify self-test / end-of-life indication operates"
−default: "Test-button trip of each GFCI device"
−```
−
−## AFCI Functional Test
−
−Each AFCI device and breaker shall be tested using its integral test function to confirm operation. Where the AFCI provides a self-test, the self-test indication shall be confirmed.
−
−## Sensor Commissioning
−
−Occupancy and vacancy sensors shall be commissioned after installation: coverage shall be walk-tested to confirm that the sensor detects occupancy throughout the intended area without dead spots and does not false-trigger from adjacent traffic or air movement, and the sensitivity and time-delay shall be adjusted to suit the space. The as-left settings shall be recorded in the closeout submittals.
−
−# Installation
−
−## Mounting Height
−
−Device mounting heights shall be [[drawing: as indicated on the drawings]] and shall comply with the reach-range and operable-element requirements of the applicable accessibility standard. Where the drawings do not indicate a height, devices shall be mounted at the standard heights established for the project. Receptacles, switches, and operable controls in accessible spaces shall be located within the accessible reach range and shall not require tight grasping, pinching, or twisting of the wrist to operate.
−
−```datasheet
−label: Standard Switch Mounting Height (to center)
−type: range
−unit: in
−drawing_ref: true
−options:
− min: 36
− max: 48
− step: 2
−default: 44
−```
−
−```datasheet
−label: Standard Receptacle Mounting Height (to center)
−type: range
−unit: in
−drawing_ref: true
−options:
− min: 15
− max: 48
− step: 1
−default: 18
−```
−
−The default heights above reflect common accessible-design practice (switches near 44 in. and general receptacles near 18 in. to center), but the governing heights are those on the drawings, which account for counters, casework, equipment, and accessibility requirements that vary by location.
−
−## Device Orientation
−
−```datasheet
−label: Receptacle Orientation
−type: radio
−options:
− - "Ground pin up"
− - "Ground pin down"
− - "Horizontal (above counters / as detailed)"
−default: "Ground pin down"
−```
−
−Device orientation shall be consistent throughout the project. The NEC does not mandate a receptacle orientation, and both ground-up and ground-down are code-compliant; the project shall select one convention and apply it uniformly so the installation looks intentional. Horizontal mounting is used above counters and where details require it.
−
−## Terminations
−
−```datasheet
−label: Device Terminal Type
−type: radio
−options:
− - "Screw terminals (side-wire), conductor under screw head"
− - "Back-wire clamp (screw-actuated pressure plate)"
− - "Push-in / back-stab (spring contact)"
−default: "Back-wire clamp (screw-actuated pressure plate)"
−```
−
−The termination is where most device failures originate. Screw (side-wire) terminals, with the conductor formed into a loop under the screw head and tightened to the device torque, are reliable and are acceptable on all grades. Back-wire clamp terminals, in which a screw drives a pressure plate against a straight inserted conductor, are preferred on specification- and higher-grade devices because they grip the full conductor cross-section under controlled pressure and accept larger conductors. Push-in (back-stab) terminations, in which a conductor is pushed into a spring contact without a screw, shall not be used: their small spring contact area is the leading cause of loose, overheating receptacle connections and they are limited to 15A and to small conductors. All screw-actuated terminations shall be tightened to the device manufacturer's published torque using a calibrated screwdriver or torque tool; over- and under-torque both produce unreliable connections.
−
−## Grounding
−
−Each device with an equipment grounding terminal shall be connected to the equipment grounding conductor of its branch circuit, and the connection shall comply with [[sync/grounding-and-bonding]]. Where a device is installed in a metal box, the grounding connection between the device, the box, and the equipment grounding conductor shall be made in accordance with NEC 250.146; a self-grounding device clip or a bonding jumper shall be used so that grounding does not depend solely on the device mounting screws contacting a painted strap. Isolated-ground receptacles, where specified, shall be installed and identified per [[sync/grounding-and-bonding]].
−
−## Box Fill and Conductor Management
−
−Devices shall be installed in outlet boxes sized for the conductors, devices, and fittings they contain in accordance with the box-fill calculation of NEC 314.16, using boxes complying with UL 514A or UL 514C per [[sync/raceways-and-conduit]]. Conductors shall be neatly formed and folded into the box without damage to insulation, and the device shall seat squarely without pinching conductors against the box edge. Boxes shall be set flush with combustible finished surfaces and set back no more than the limit permitted by NEC 314.20 in noncombustible surfaces; gaps around the box shall be repaired so the plate seats flat.
−
−## Identification
−
−Switches, receptacles, and sensors shall be identified where identification aids operation or maintenance. Controlled receptacles shall be marked per the energy code. Receptacles protected by an upstream GFCI shall be marked "GFCI Protected." Emergency and critical-branch receptacles shall be identified by their distinct color and, where required, by engraved plates identifying the panel and circuit. Receptacle and switch cover plates shall be labeled with the panel and circuit designation where required by the contract documents.
−
−```datasheet
−label: Device Circuit Identification
−type: radio
−options:
− - "Plate engraved/labeled with panel and circuit (designated devices)"
− - "No device-level circuit labeling required"
−default: "No device-level circuit labeling required"
−```
−
−# Delivery, Storage, and Handling
−
−Wiring devices shall be delivered in the manufacturer's original packaging with listing marks intact and shall remain packaged until installed, so that devices are not soiled, painted over, or damaged during finish work. Devices shall not be installed until the space is clean and dry and finish work that could soil or paint the device is complete. Where devices must be installed before painting, they shall be protected so that paint does not enter the device or coat the strap, because paint on the mounting strap defeats the grounding path to a metal plate. Devices contaminated by paint, joint compound, or other finish materials shall be replaced, not cleaned in place.
−
−# Warranty
−
−Devices that carry a manufacturer warranty against defects in materials and workmanship shall be warranted to the Owner. The Contractor shall warrant the installation, including all terminations and the results of device testing, for the project warranty period.
−
−```datasheet
−label: Installation Warranty Period
−type: select
−options:
− - "1 year from substantial completion"
− - "2 years from substantial completion"
−default: "1 year from substantial completion"
−```
−
−# Spare Parts
−
−The Contractor shall provide spare devices and plates so that the Owner can replace failed or damaged devices with matching parts without procurement delay and without color or style mismatch.
−
−```datasheet
−label: Spare Devices Provided to Owner
−type: select
−options:
− - "None"
− - "2% of each device type, grade, and color (minimum two each)"
− - "5% of each device type, grade, and color (minimum two each)"
−default: "2% of each device type, grade, and color (minimum two each)"
−```
−
−Spare devices shall match the installed devices in type, grade, NEMA configuration, and color, and shall be delivered with matching wall plates. Spares shall be labeled by type and color and turned over in a labeled container at substantial completion.
+---
+title: Wiring Devices
+category: Electrical
+toc_depth: 3
+description: >
+ When to use: Receptacles, switches, and related wiring devices rated 125V through 250V and 60A and below for commercial, institutional, and light-industrial interior and exterior applications. Covers device grade and quality, NEMA receptacle configurations, GFCI and AFCI protection, tamper-resistant and weather-resistant devices, USB and specialty receptacles, snap switches, occupancy and vacancy sensors, wall plates and finishes, and floor and poke-through devices, including device testing and installation.
+
+ Not intended for: Branch-circuit overcurrent protection and panel-mounted GFCI/AFCI breakers (see [[sync/low-voltage-panelboards]]), the branch-circuit conductors and equipment grounding conductors feeding the devices (see [[sync/conductors-and-cables]]), the raceways, outlet boxes, and floor-box conduit systems beyond the device requirements stated here (see [[sync/raceways-and-conduit]]), lighting fixtures and integral fixture controls, networked or digital lighting-control systems and their relay panels, pin-and-sleeve and locking devices above 60A, low-voltage data and communications jacks, or devices in hazardous (classified) locations without application-specific modifications.
+---
+
+# Scope {toc}
+
+## This standard covers the materials, ratings, configuration, installation, and field testing of wiring devices for low-voltage branch circuits rated 125V through 250V and 60A and below. {note}
+## Wiring devices include receptacles, attachment-plug outlets, snap (toggle and decorator) switches, ground-fault and arc-fault protective devices, occupancy and vacancy sensors, wall plates, and floor and poke-through outlet devices. {note}
+
+## Wiring devices are the most numerous, most visible, and most frequently handled electrical components in a building, and they are also the components most often value-engineered to failure. {note}
+## A receptacle is touched, plugged, and unplugged thousands of times over its life; a switch is actuated tens of thousands of times. {note}
+## The difference between a device that survives that duty cycle and one that loosens, overheats, or breaks is almost entirely a function of the device grade selected and the quality of the field termination. {note}
+
+## Devices and their installation shall comply with NFPA 70 (National Electrical Code), principally Article 406 for receptacles, Article 404 for switches, 210.8 for ground-fault protection, and 210.12 for arc-fault protection.
+
+## Devices shall be listed and labeled by a Nationally Recognized Testing Laboratory.
+
+## Device grade is treated as a primary engineering decision rather than an afterthought, because the installed cost difference between grades is small relative to the cost of replacing failed devices in an occupied building. {note}
+
+## The branch circuit that supplies a device, including its conductors and equipment grounding conductor, is governed by [[sync/conductors-and-cables]]; the outlet box, raceway, and floor-box rough-in that house the device are governed by [[sync/raceways-and-conduit]]; panel-mounted GFCI and AFCI breakers are governed by [[sync/low-voltage-panelboards]]; and the equipment grounding connection every device depends upon is governed by [[sync/grounding-and-bonding]]. This standard governs the device itself, its plate, and the requirements for terminating and testing it. {note}
+
+## Device locations, mounting heights, circuiting, and the assignment of switches to controlled loads shall be [[drawing: as indicated on the electrical drawings]].
+
+# Referenced Standards {toc}
+
+## Devices, materials, and installation shall comply with the latest adopted edition of the following standards and codes.
+
+| Standard | Title |
+|----------|-------|
+| NFPA 70 | National Electrical Code (Articles 110, 210, 250, 404, 406, 314, 517, 680) |
+| NFPA 70E | Standard for Electrical Safety in the Workplace |
+| UL 498 | Attachment Plugs and Receptacles |
+| UL 943 | Ground-Fault Circuit-Interrupters |
+| UL 1699 | Arc-Fault Circuit-Interrupters |
+| UL 1472 | Solid-State Dimming Controls |
+| UL 773 | Plug-In, Locking Type Photocontrols for Use with Area Lighting (and UL 773A, Nonindustrial Photoelectric Switches) |
+| UL 1449 | Surge Protective Devices |
+| UL 514A | Metallic Outlet Boxes |
+| UL 514B | Conduit, Tubing, and Cable Fittings |
+| UL 514C | Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers |
+| NEMA WD 1 | General Color Requirements for Wiring Devices |
+| NEMA WD 6 | Wiring Devices — Dimensional Specifications |
+| NEMA WD 7 | Occupancy Motion Sensors Standard |
+| FS W-C-596 | Federal Specification, Connector, Plug and Receptacle, Electrical (device grade references) |
+| FS W-S-896 | Federal Specification, Switches, Toggle (device grade references) |
+
+## Where the contract documents, the adopted building code, or a referenced standard conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.
+
+# Submittals {toc}
+
+## Action Submittals {toc}
+
+### Contractor shall submit the following for the Engineer's review prior to procurement:
+
+- Product data for each device type, grade, ampere and voltage rating, NEMA configuration, and color, including receptacles, switches, GFCI and AFCI devices, sensors, wall plates, and floor and poke-through assemblies
+- Documentation of listing and labeling for each device, identifying the applicable UL standard and, for receptacles, the NEMA WD 6 configuration designation
+- For occupancy and vacancy sensors, the sensing technology, coverage pattern and range, time-delay range, and the wiring topology (line-voltage versus low-voltage with a separate power pack)
+- For floor and poke-through devices, the assembly fire-resistance rating where installed in a fire-rated floor, the service openings provided (power, low-voltage), and the finish
+- A device color and finish schedule coordinating device color, plate material, and plate finish with the architectural finish schedule
+
+```datasheet
+label: Action Submittals Required
+type: checkbox
+options:
+ - "Product data for each device type and grade"
+ - "Listing/labeling documentation (UL standard and NEMA configuration)"
+ - "Occupancy/vacancy sensor coverage and technology data"
+ - "Floor / poke-through assembly data (fire rating, services, finish)"
+ - "Device color and plate finish schedule"
+default: "Product data for each device type and grade"
+```
+
+### Devices shall not be ordered until the corresponding submittals are reviewed and returned.
+
+## Closeout Submittals {toc}
+
+### Contractor shall provide the following at substantial completion:
+
+- Field test reports for receptacle wiring verification and GFCI/AFCI functional testing, identifying any device replaced as a result of testing
+- Operation and maintenance data for occupancy/vacancy sensors and any programmable devices, including time-delay and sensitivity settings as left
+- Warranty documentation for devices carrying a manufacturer warranty
+- A record device schedule reflecting the as-installed device types, grades, and colors by area
+
+```datasheet
+label: Closeout Submittals Required
+type: checkbox
+options:
+ - "Field test reports (receptacle wiring, GFCI/AFCI functional)"
+ - "O&M data for sensors and programmable devices (settings as left)"
+ - "Warranty documentation"
+ - "Record device schedule (types, grades, colors by area)"
+default: [Field test reports (receptacle wiring, GFCI/AFCI functional), O&M data for sensors and programmable devices (settings as left), Warranty documentation, Record device schedule (types, grades, colors by area)]
+```
+
+# Quality Assurance {toc}
+
+## Installer Qualifications {toc}
+
+### Termination quality is the single largest field variable affecting device reliability. {note}
+
+### Wiring devices shall be installed by electricians experienced in device termination and supervised by a licensed electrical contractor.
+
+### Personnel shall be familiar with the correct preparation and torque of the terminal type specified for each device.
+
+## Listing and Labeling {toc}
+
+### Every wiring device shall be listed and labeled by a Nationally Recognized Testing Laboratory for its specific use.
+
+### Receptacles and attachment plugs shall be listed to UL 498.
+
+### Ground-fault circuit-interrupter devices shall be listed to UL 943.
+
+### Arc-fault devices shall be listed to UL 1699.
+
+### Solid-state dimmers shall be listed to UL 1472.
+
+### A device shall not be installed in any application beyond the ratings and use for which it is listed.
+
+## Source Limitations {toc}
+
+### A receptacle from one manufacturer and a plate from another frequently do not align cleanly even when both meet NEMA WD 6 dimensions; sourcing devices and plates as a coordinated set avoids visible misalignment. {note}
+
+### All wiring devices of a given type and grade on a project should be furnished by a single manufacturer so that color, plate fit, and replacement-part interchangeability are consistent throughout the building.
+
+## Regulatory Requirements {toc}
+
+### Devices and their installation shall comply with all applicable federal, state, and local codes, including the adopted edition of NFPA 70 and any state or local amendments.
+
+### Work shall be subject to inspection by the Authority Having Jurisdiction.
+
+# Environmental and Service Conditions {toc}
+
+## The location of a device dictates several mandatory device characteristics under the NEC, independent of any designer preference. {note}
+## The selection below records the governing condition for each device group so that the correct device characteristics are carried through procurement. {note}
+
+```datasheet
+label: Device Location Class
+type: select
+options:
+ - "Indoor dry — general interior, climate-controlled"
+ - "Indoor damp — unconditioned interior, high-humidity areas"
+ - "Outdoor / wet — exposed to weather or washdown"
+ - "Mixed (per drawings by area)"
+default: "Indoor dry — general interior, climate-controlled"
+```
+
+## A device in a damp or wet location shall be weather-resistant and shall be protected by an appropriate cover.
+
+## A device in a location listed in NEC 406.12 shall be tamper-resistant.
+
+## A device in a location listed in NEC 210.8 shall have ground-fault protection.
+
+## These location-driven requirements are not optional and are addressed in the product sections that follow. {note}
+
+# Device Grade and Quality {toc}
+
+## The grade of a wiring device, established by its construction and by the durability and retention tests it passes under UL 498, is the primary determinant of how long the device will function in service. {note}
+## Grade is not a marketing term; it corresponds to measurable differences in contact material, contact pressure, strap thickness, and terminal robustness, and historically to the federal device-grade references FS W-C-596 for receptacles and FS W-S-896 for switches. {note}
+
+## Receptacle Grade {toc}
+
+### Commercial grade provides substantially higher contact retention and strap durability than residential-grade devices at a small premium, and it is the grade that survives the plug-and-unplug cycling of an occupied building without developing loose, heat-generating connections. {note}
+
+```datasheet
+label: Receptacle Grade
+type: radio
+options:
+ - "Residential / general use"
+ - "Commercial / specification grade"
+ - "Heavy-duty / industrial grade"
+ - "Hospital grade (UL 498, green dot)"
+default: "Commercial / specification grade"
+```
+
+### Commercial (specification) grade shall be the default for commercial, institutional, and tenant-improvement work unless a higher or lower grade is indicated.
+
+### Residential/general-use grade should be limited to dwelling units and light-duty locations where cost governs and duty is low.
+
+### Heavy-duty/industrial grade should be specified for shops, kitchens, equipment rooms, and any location subject to heavy or abusive plug cycling.
+
+### Hospital-grade receptacles, identified by the green dot required under UL 498 and tested to additional grounding-reliability, assembly-integrity, and abrupt-removal requirements, shall be used in patient care spaces and wherever else required by NEC Article 517, and may be specified for other critical-equipment locations where maximum grounding reliability is required.
+
+## Switch Grade {toc}
+
+### A specification-grade switch is rated for a far greater number of mechanical operations than a residential switch; switch grade follows the same logic as receptacle grade. {note}
+
+```datasheet
+label: Switch Grade
+type: radio
+options:
+ - "Residential / general use"
+ - "Commercial / specification grade"
+ - "Heavy-duty / industrial grade"
+default: "Commercial / specification grade"
+```
+
+### A specification-grade switch shall be the default for commercial spaces, where a single switch may be actuated many times per day for decades.
+
+## Switch and Receptacle Ampere Rating {toc}
+
+### The 20A receptacle accepts both 15A and 20A attachment plugs; a 20A switch is similarly preferred for commercial work because its higher contact rating extends life under inductive lighting loads. {note}
+
+```datasheet
+label: General-Purpose Device Ampere Rating
+type: radio
+unit: A
+options:
+ - "15 A"
+ - "20 A"
+default: "20 A"
+```
+
+### A 20A device shall be the default for commercial branch circuits, which are commonly wired as 20A circuits.
+
+### A 20A receptacle is required where a single receptacle is the only outlet on a 20A circuit.
+
+### The device ampere rating shall not exceed the branch-circuit rating, and a receptacle's rating shall be coordinated with the circuit per NEC 210.21(B).
+
+# Receptacles and NEMA Configurations {toc}
+
+## The physical configuration of a receptacle — the arrangement of its slots and ground contact — is standardized by NEMA WD 6, which assigns a designation (for example 5-15R, 5-20R, 6-20R, L5-30R) encoding the voltage class, the ampere rating, and whether the device is straight-blade or locking. {note}
+## Specifying the correct NEMA configuration is what guarantees that the receptacle physically accepts only the intended attachment plug and rejects others, which is itself a safety function. {note}
+
+## Configurations shall be specified by their NEMA WD 6 designation, never by appearance or by a manufacturer catalog number.
+
+## General-Purpose Receptacle Configuration {toc}
+
+### The 5-20R, 125V 20A straight-blade configuration is the workhorse of commercial construction and is the correct default for general convenience receptacles on 20A circuits. {note}
+### The 5-15R is appropriate for 15A circuits and residential general use. {note}
+### The 6-series 250V configurations serve dedicated 240V single-phase equipment. {note}
+### The locking blade prevents the plug from being pulled out under load or vibration. {note}
+
+```datasheet
+label: General-Purpose Receptacle NEMA Configuration
+type: select
+options:
+ - "5-15R — 125V, 15A, straight blade"
+ - "5-20R — 125V, 20A, straight blade"
+ - "6-15R — 250V, 15A, straight blade"
+ - "6-20R — 250V, 20A, straight blade"
+ - "L5-20R — 125V, 20A, locking"
+ - "L5-30R — 125V, 30A, locking"
+ - "L6-20R — 250V, 20A, locking"
+ - "L6-30R — 250V, 30A, locking"
+default: "5-20R — 125V, 20A, straight blade"
+```
+
+### Locking (twist-lock) configurations shall be specified where an accidental disconnection would be hazardous or disruptive — portable equipment, temporary power, rooftop and mechanical equipment, and stage or audiovisual power.
+
+## Receptacle Configuration — Single vs. Duplex {toc}
+
+### A duplex receptacle is the default general-purpose device. {note}
+### Quad assemblies are appropriate at workstations and equipment racks where outlet density is high. {note}
+
+```datasheet
+label: Receptacle Device Type
+type: radio
+options:
+ - "Duplex (two receptacles per device)"
+ - "Single (one receptacle per device)"
+ - "Quad (four receptacles, two ganged duplexes)"
+default: "Duplex (two receptacles per device)"
+```
+
+### A single receptacle shall be used where a dedicated piece of equipment requires the entire circuit, where a single receptacle is installed on an individual branch circuit and must therefore be rated not less than the circuit per NEC 210.21(B)(1), or where codes restrict the outlet to one device.
+
+## Controlled and Marked Receptacles {toc}
+
+```datasheet
+label: Controlled Receptacle Marking (energy code)
+type: radio
+options:
+ - "Not required"
+ - "Automatically controlled receptacles marked per energy code"
+default: "Not required"
+```
+
+### Where the adopted energy code requires that a portion of receptacles be automatically controlled (switched off when a space is unoccupied), the controlled receptacles shall be permanently marked with the distinctive symbol that identifies them as controlled, so that occupants do not connect equipment requiring continuous power to a controlled outlet.
+
+### The controlled and uncontrolled receptacles, and which are switched, shall be [[drawing: as indicated on the drawings]].
+
+# Ground-Fault and Arc-Fault Protection {toc}
+
+## Ground-fault and arc-fault protection may be provided at the device (a GFCI or AFCI receptacle) or upstream at the panelboard (a GFCI or AFCI breaker, per [[sync/low-voltage-panelboards]]).
+## Both satisfy the code requirement; the choice affects cost, the extent of wiring protected, and the location at which a tripped device is reset. {note}
+## This standard governs the device-level option. {note}
+
+## Ground-Fault Circuit-Interrupter (GFCI) Protection {toc}
+
+### NEC 210.8 requires ground-fault protection for personnel on receptacles in a broad and expanding set of locations, including bathrooms, kitchens and other areas with sinks or food-preparation provisions, garages, outdoors, rooftops, crawl spaces, and unfinished basements, and the protected range now extends through 250V at the specified locations. {note}
+
+### A GFCI receptacle at the point of use is the common default because it protects the connected equipment, is reset locally, and isolates a trip to a single outlet. {note}
+### A GFCI breaker at the panelboard additionally protects the branch-circuit wiring and is preferred where the wiring is exposed to damage or where local reset is impractical. {note}
+
+```datasheet
+label: GFCI Protection Method (where 210.8 applies)
+type: radio
+options:
+ - "GFCI receptacle at the point of use"
+ - "GFCI breaker at the panelboard (protects branch-circuit wiring)"
+ - "First GFCI receptacle feeding downstream protected receptacles"
+default: "GFCI receptacle at the point of use"
+```
+
+### Where a receptacle is in a location listed in NEC 210.8, it shall be GFCI-protected by a listed GFCI device.
+
+### Where a single upstream GFCI receptacle feeds downstream conventional receptacles on its load terminals, every downstream receptacle so protected shall be marked "GFCI Protected" and "No Equipment Ground" only where applicable, and the downstream extent shall be clear so that a future trip can be diagnosed.
+
+### GFCI devices for personnel protection shall be Class A, listed to UL 943, which trips on a ground-fault current of 6 mA and does not trip below 4 mA.
+
+### Devices of other classes, which trip at higher currents, protect equipment but not people and shall not be substituted where personnel protection is required.
+
+### GFCI devices shall incorporate the self-test and end-of-life functions required by the current edition of UL 943.
+
+### A GFCI that can no longer protect shall deny power or provide a distinct indication rather than continuing to pass power as an ordinary receptacle.
+
+## Arc-Fault Circuit-Interrupter (AFCI) Protection {toc}
+
+### NEC 210.12 requires combination-type arc-fault protection on 120V, 15A and 20A branch circuits supplying outlets in dwelling units, dormitories, guest rooms, and similar residential occupancies. {note}
+
+### A combination AFCI breaker at the panelboard is the cleanest method because it protects the entire branch circuit including the homerun, and it is the default where AFCI is required. {note}
+### The outlet AFCI device is used where an existing branch-circuit homerun cannot be protected at the panel. {note}
+### AFCI is not generally required in commercial occupancies. {note}
+
+```datasheet
+label: AFCI Protection (where 210.12 applies)
+type: radio
+options:
+ - "Not required (non-residential occupancy)"
+ - "Combination AFCI breaker at panelboard"
+ - "Outlet-branch-circuit AFCI device at first outlet"
+default: "Not required (non-residential occupancy)"
+```
+
+### AFCI protection may be provided by a combination AFCI breaker at the panelboard or, where permitted, by an outlet-branch-circuit AFCI device at the first outlet.
+
+### The Engineer may specify AFCI for commercial areas with concentrated plug loads and extension-cord use as a proactive fire-prevention measure.
+
+## Dual-Function Devices {toc}
+
+```datasheet
+label: Dual-Function (AFCI + GFCI) Device
+type: radio
+options:
+ - "Not used"
+ - "Dual-function device where both AFCI and GFCI are required"
+default: "Not used"
+```
+
+### A dual-function device provides both Class A GFCI and AFCI protection in a single receptacle and may be used at the first outlet of a residential circuit that requires both, avoiding two stacked devices.
+
+# Tamper-Resistant and Weather-Resistant Devices {toc}
+
+## Tamper resistance and weather resistance are independent device characteristics, each required by the NEC in its own set of locations, and a device may need to be both.
+## They are not interchangeable and shall not be confused.
+
+## Tamper-Resistant (TR) Receptacles {toc}
+
+### NEC 406.12 requires that 15A and 20A, 125V and 250V nonlocking receptacles be listed tamper-resistant in a wide range of dwelling and now non-dwelling locations, including guest rooms, child care facilities, and many educational, health-care, and assembly spaces. {note}
+### A tamper-resistant receptacle incorporates an internal shutter mechanism that opens only when both contacts are engaged simultaneously by a plug, preventing the insertion of a single foreign object into one slot. {note}
+### The default here follows code minimum, but project-wide TR is a common and reasonable election. {note}
+
+```datasheet
+label: Tamper-Resistant (TR) Receptacles
+type: radio
+options:
+ - "TR where required by NEC 406.12"
+ - "TR for all 15A/20A 125V receptacles (project-wide)"
+ - "Not required (no 406.12 locations)"
+default: "TR where required by NEC 406.12"
+```
+
+### Specifying tamper-resistant receptacles project-wide for all standard 15A and 20A 125V outlets is a defensible simplification that eliminates the risk of a non-TR device being installed in a location that requires TR, at negligible added cost. {note}
+
+## Weather-Resistant (WR) Receptacles {toc}
+
+### NEC 406.9 requires that receptacles installed in damp or wet locations be listed weather-resistant. {note}
+### A weather-resistant receptacle uses materials and a construction that withstand exposure to moisture, humidity, and temperature extremes without the contact corrosion and material degradation that would occur in an ordinary device. {note}
+### A combined WR/TR device satisfies both requirements in one part. {note}
+
+```datasheet
+label: Weather-Resistant (WR) Receptacles
+type: radio
+options:
+ - "WR at all damp and wet locations (NEC 406.9)"
+ - "Not applicable (no damp/wet receptacle locations)"
+default: "WR at all damp and wet locations (NEC 406.9)"
+```
+
+### A receptacle that is in a wet or damp location and also in a location listed in NEC 406.12 shall be both weather-resistant and tamper-resistant.
+
+## In-Use (Bubble) Covers for Wet Locations {toc}
+
+### This requires an "in-use" or "bubble" cover for any wet-location receptacle that may have a cord connected while exposed to weather, because a flat weatherproof cover is weatherproof only when closed and open to the weather whenever a cord is plugged in.
+
+```datasheet
+label: Wet-Location Receptacle Cover
+type: radio
+options:
+ - "In-use (bubble) cover, weatherproof with plug inserted"
+ - "Flush/flat weatherproof cover (damp location, no continuous cord use)"
+default: "In-use (bubble) cover, weatherproof with plug inserted"
+```
+
+### Receptacles in a wet location shall be provided with an enclosure that is weatherproof whether or not a plug is inserted, in accordance with NEC 406.9(B).
+
+# USB and Specialty Receptacles {toc}
+
+## USB-Integrated Receptacles {toc}
+
+### A USB-integrated receptacle combines a standard duplex receptacle with one or more integral USB charging ports. {note}
+### The integral electronics have a shorter service life than the receptacle contacts and may date the installation as charging standards evolve.
+
+```datasheet
+label: USB-Integrated Receptacles
+type: radio
+options:
+ - "Not used"
+ - "Provided at designated locations (duplex receptacle with integral USB)"
+default: "Not used"
+```
+
+### Where specified, the device shall be listed and the USB port types and output rating shall be coordinated with current charging standards.
+
+### USB-integrated receptacles should be specified only at locations where charging convenience is part of the program (hospitality, conference, lobby, and similar).
+
+### USB receptacles shall not be relied upon where a code requirement (GFCI, TR, WR) applies unless the specific device is listed for that requirement.
+
+## Surge-Suppression Receptacles {toc}
+
+### A surge-suppression receptacle incorporates a Type 3 point-of-use surge protective device listed to UL 1449 and provides localized transient protection for connected electronic equipment. {note}
+### A depleted suppressor that still passes power gives a false sense of protection. {note}
+
+```datasheet
+label: Surge-Suppression Receptacle
+type: radio
+options:
+ - "Not used"
+ - "Provided at designated sensitive-equipment locations"
+default: "Not used"
+```
+
+### A surge-suppression receptacle supplements, and does not replace, the service- or panel-level surge protection specified in [[sync/low-voltage-panelboards]].
+
+### A surge-suppression receptacle shall include a status indicator showing whether its protection remains functional.
+
+# Switches {toc}
+
+## A snap switch controls a lighting or other load by interrupting one or more conductors. {note}
+## The switch type is determined by how many control points the load is operated from, and the actuator style is a finish decision. {note}
+## Switch ratings, like receptacle ratings, are governed by UL 498 and the device grade. {note}
+
+## Switch Type {toc}
+
+### A single-pole switch controls a load from one location and is the default. {note}
+### Three-way switches are used in pairs to control one load from two locations; four-way switches are inserted between a pair of three-ways to add control locations. {note}
+### A double-pole switch interrupts both ungrounded conductors of a 240V single-phase load. {note}
+
+```datasheet
+label: Switch Type (control points)
+type: select
+options:
+ - "Single-pole (one control location)"
+ - "Three-way (two control locations)"
+ - "Four-way (three or more control locations)"
+ - "Double-pole (switches both ungrounded conductors of a 240V load)"
+ - "Momentary / centre-off (low-voltage or pilot control)"
+default: "Single-pole (one control location)"
+```
+
+### The switch type at each location is determined by the control scheme and shall be [[drawing: as indicated on the drawings]].
+
+### Where the grounded (neutral) conductor is required at switch locations by NEC 404.2(C) to supply electronic switches and sensors, the neutral shall be provided in the switch box.
+
+## Actuator Style {toc}
+
+### Decorator (paddle) style is the prevailing commercial standard and coordinates with the decorator opening used by most sensors and electronic controls; toggle is selected where a traditional appearance is desired. {note}
+### Mixing toggle and decorator styles within a space requires different plates and looks inconsistent. {note}
+
+```datasheet
+label: Switch Actuator Style
+type: radio
+options:
+ - "Toggle"
+ - "Decorator (paddle / rocker)"
+default: "Decorator (paddle / rocker)"
+```
+
+### Actuator style shall match the device family selected for the project so that switches, dimmers, and sensors share a consistent appearance and a common plate opening.
+
+## Pilot-Light and Illuminated Switches {toc}
+
+### A pilot-light switch illuminates when the controlled load is energized and is used where the load is not visible from the switch (exhaust fans, remote equipment). {note}
+### An illuminated-handle switch glows when the load is off so the switch can be found in a dark room. {note}
+
+```datasheet
+label: Pilot-Light / Illuminated Switches
+type: radio
+options:
+ - "Not used"
+ - "Pilot-light switch where load status indication is required"
+ - "Illuminated (lighted-handle) switch for locating in the dark"
+default: "Not used"
+```
+
+### The pilot-light switch and the illuminated-handle switch are opposite in behavior and shall not be confused on the drawings.
+
+## Dimmer Switches {toc}
+
+### Dimmer-load compatibility is the most common dimming failure. {note}
+
+```datasheet
+label: Dimmer Switches
+type: radio
+options:
+ - "Not used"
+ - "Solid-state dimmers at designated locations (UL 1472)"
+default: "Not used"
+```
+
+### Where dimming is provided by a wall-box device rather than by a networked lighting-control system, the dimmer shall be a solid-state dimmer listed to UL 1472 and shall be compatible with the connected load type.
+
+### The dimmer shall be listed and rated for the specific load technology it controls (for example, LED drivers of the forward- or reverse-phase type used on the project).
+
+### The dimmer's load rating shall be derated for gang installation where adjacent dimmers share a multigang box, because grouped dimmers cannot dissipate full rated heat.
+
+### The load type and dimming method shall be [[drawing: as indicated on the lighting drawings]].
+
+# Occupancy and Vacancy Sensors {toc}
+
+## An occupancy sensor turns a load on automatically when it detects presence and off after an interval of no detection; a vacancy sensor turns a load off automatically but requires a manual on. {note}
+## Vacancy (manual-on) control is required by many energy codes in specific space types precisely because it does not energize lighting in a briefly entered or daylit space. {note}
+
+## The distinction between occupancy and vacancy operation is a code-driven control decision, not a hardware difference alone, and shall be specified per space.
+
+## Sensors shall meet the testing requirements of NEMA WD 7.
+
+## Sensor Control Mode {toc}
+
+### Vacancy (manual-on) control is the default because it complies with the prevailing energy-code requirement for many enclosed spaces and prevents lighting from energizing when a space is entered briefly or is adequately daylit. {note}
+### Occupancy (auto-on) control is appropriate for spaces where hands-free operation is required for safety or convenience, such as corridors, restrooms, and stairwells. {note}
+
+```datasheet
+label: Sensor Control Mode
+type: radio
+options:
+ - "Occupancy (auto-on, auto-off)"
+ - "Vacancy (manual-on, auto-off)"
+ - "Selectable (field-configurable occupancy or vacancy)"
+default: "Vacancy (manual-on, auto-off)"
+```
+
+### The required mode for each space shall be [[drawing: as indicated on the lighting-control drawings]].
+
+## Sensing Technology {toc}
+
+### Passive infrared sensors detect the moving heat of an occupant and require an unobstructed line of sight; they resist false-on but can miss minor motion behind obstructions. {note}
+### Ultrasonic sensors detect motion by Doppler shift of an emitted signal and see around obstructions and into partitioned spaces, but are more prone to false triggering from air movement. {note}
+### Dual-technology sensors require both signals to turn on and either signal to hold on, combining the reliability of both and minimizing both false-on and false-off. {note}
+### Single-technology PIR is appropriate and economical for simple spaces with full line of sight; ultrasonic suits restrooms and spaces with stalls or partitions. {note}
+
+```datasheet
+label: Sensor Technology
+type: radio
+options:
+ - "Passive infrared (PIR)"
+ - "Ultrasonic"
+ - "Dual-technology (PIR + ultrasonic)"
+default: "Dual-technology (PIR + ultrasonic)"
+```
+
+### Dual-technology is the default for enclosed offices, conference rooms, and any space where a missed occupant or a nuisance activation is disruptive.
+
+## Sensor Mounting {toc}
+
+### A wall-box sensor replaces the wall switch and powers directly from the switch leg; it suits small enclosed rooms with a clear view from the switch location. {note}
+### A ceiling-mounted sensor provides 360-degree coverage of larger or irregular spaces and connects through a low-voltage power pack that switches the line-voltage load. {note}
+
+```datasheet
+label: Sensor Mounting
+type: radio
+options:
+ - "Wall-box (replaces wall switch)"
+ - "Ceiling-mounted (with separate power pack)"
+default: "Wall-box (replaces wall switch)"
+```
+
+### Ceiling sensors require a low-voltage class-2 connection to the power pack; that wiring and the power-pack location shall be coordinated with [[sync/raceways-and-conduit]].
+
+## Time Delay {toc}
+
+### The off time-delay is the interval the sensor waits after the last detected motion before switching the load off. {note}
+### Too short a delay produces nuisance shut-offs while a space is occupied but still; too long a delay wastes energy and may exceed the maximum the energy code allows.
+### A delay of about 15 minutes balances occupant comfort against energy savings for typical office and conference spaces. {note}
+
+```datasheet
+label: Sensor Off Time-Delay
+type: range
+unit: minutes
+options:
+ min: 1
+ max: 30
+ setpoints: [1, 5, 10, 15, 20, 30]
+default: 15
+```
+
+### The off time-delay shall be set within the limit imposed by the adopted energy code and adjusted in the field to suit the space.
+
+# Wall Plates and Finishes {toc}
+
+## The wall plate is the most visible electrical component in a finished space and is also a coordination item with the architectural finishes. {note}
+## Plate material and color are finish decisions; the plate's fit and listing are quality decisions. {note}
+
+## Wall Plate Material {toc}
+
+### Nylon thermoplastic plates are the commercial default: impact-resistant, color-stable, and inexpensive, and available in the standard device colors. {note}
+### Stainless steel plates are specified in kitchens, healthcare, and high-traffic or high-abuse areas where durability and cleanability govern, and where the architectural intent calls for a metal finish. {note}
+
+```datasheet
+label: Wall Plate Material
+type: select
+options:
+ - "Thermoplastic / nylon (standard commercial)"
+ - "Stainless steel (type 302/304)"
+ - "Smooth metal (painted or anodized)"
+ - "Weatherproof (gasketed, for damp/wet locations)"
+default: "Thermoplastic / nylon (standard commercial)"
+```
+
+### Weatherproof gasketed plates are required at damp and wet locations and shall be coordinated with the in-use cover requirements for wet-location receptacles.
+
+### Metal plates installed on a device shall be grounded through the device mounting strap, which requires that the device be properly grounded.
+
+## Wall Plate Size {toc}
+
+### Oversized plates are commonly specified for masonry, existing-wall, and renovation conditions where the box opening cannot be cut cleanly. {note}
+
+```datasheet
+label: Wall Plate Size
+type: radio
+options:
+ - "Standard"
+ - "Oversized / jumbo (covers rough openings and wall imperfections)"
+default: "Standard"
+```
+
+### Standard plates shall be used throughout unless the rough opening or the wall finish condition requires an oversized plate to cover gaps.
+
+## Device and Plate Color {toc}
+
+### Device and plate color is coordinated with the architectural finish schedule; white is the prevailing commercial default. {note}
+### Color also carries information: receptacles on the emergency or critical branch of an essential electrical system are commonly specified in red so that occupants can identify outlets that remain powered during a normal-power outage. {note}
+
+```datasheet
+label: Device and Plate Color
+type: select
+options:
+ - "White"
+ - "Light almond"
+ - "Ivory"
+ - "Gray"
+ - "Black"
+ - "Brown"
+ - "Red (designated emergency / critical-branch outlets)"
+default: "White"
+```
+
+### Where color is used to designate a circuit type (red for emergency, or a distinct color for an isolated-ground or controlled receptacle), that convention shall be applied consistently and shall be [[drawing: as indicated on the drawings]].
+
+### Color identification of devices shall follow NEMA WD 1.
+
+# Floor and Poke-Through Devices {toc}
+
+## Floor outlet devices bring power and low-voltage services to the interior of a space away from walls — open offices, conference tables, retail floors, and assembly spaces. {note}
+## They take two principal forms: a recessed floor box set in the slab, and a poke-through fitting that penetrates the structural floor to draw service from the ceiling space below. {note}
+## Both must address the fire-resistance rating of the floor they penetrate, and both must keep power and low-voltage services separated.
+
+## Floor Device Type {toc}
+
+### A poke-through fitting is the common solution for adding outlets in the open field of a finished floor over occupied space below, because it can be cored and installed without disturbing the slab reinforcement and draws service from the ceiling plenum below. {note}
+### A recessed floor box is set during slab construction and suits new construction where outlet locations are known before the pour. {note}
+
+```datasheet
+label: Floor Device Type
+type: radio
+options:
+ - "Recessed floor box (set in slab)"
+ - "Poke-through fitting (penetrates floor, fed from below)"
+ - "Surface raceway floor box (poke-through with surface enclosure)"
+default: "Poke-through fitting (penetrates floor, fed from below)"
+```
+
+### Floor device locations shall be [[drawing: as indicated on the drawings]] and coordinated with the structural slab and the furniture layout.
+
+## Fire-Resistance Rating {toc}
+
+### The fire rating of the floor assembly the device penetrates is set by the building's fire-resistance design. {note}
+### An ordinary cored hole with a fitting does not maintain the rating. {note}
+
+```datasheet
+label: Floor Penetration Fire Rating to be Maintained
+type: select
+options:
+ - "Non-rated floor (no rating to maintain)"
+ - "1-hour rated floor assembly"
+ - "2-hour rated floor assembly"
+default: "2-hour rated floor assembly"
+```
+
+### Where a floor device penetrates a fire-rated floor assembly, the device assembly shall be listed and installed to restore the fire-resistance rating of the floor, in accordance with the listing of the poke-through or floor-box system and the firestopping requirements of the assembly.
+
+### A poke-through fitting that penetrates a rated floor shall be a listed through-penetration firestop assembly.
+
+### The fire rating of the floor assembly the device penetrates shall be confirmed against the architectural and life-safety drawings; the device assembly shall carry a listing for that rating.
+
+### Firestopping at the penetration shall be coordinated with the project firestopping requirements.
+
+## Service Separation and Capacity {toc}
+
+```datasheet
+label: Floor Device Services
+type: checkbox
+options:
+ - "Power (receptacles)"
+ - "Low-voltage / data"
+ - "Audiovisual"
+default: "Power (receptacles)"
+```
+
+### A floor device that carries both power and low-voltage services shall maintain physical separation between the power and low-voltage compartments as required by the device listing and by NEC, so that the two systems do not share a common opening.
+
+### The number of receptacles and the low-voltage capacity of the device shall be coordinated with the connected equipment.
+
+## Floor Device Finish {toc}
+
+### The floor device cover is a visible architectural element. {note}
+### Carpet, tile, and exposed-concrete floors each have a preferred cover and trim treatment. {note}
+
+```datasheet
+label: Floor Device Cover Finish
+type: select
+options:
+ - "Brushed aluminum"
+ - "Brass"
+ - "Brushed stainless steel"
+ - "Nonmetallic (for carpet/tile flush mount)"
+default: "Brushed aluminum"
+```
+
+### The floor device cover finish shall be coordinated with the floor finish, and the cover shall be selected to suit the floor finish at each device location.
+
+# Testing {toc}
+
+## Wiring devices receive no factory acceptance test of the type applied to assembled equipment; their meaningful verification happens in the field after installation, where wiring errors and defective terminations are found. {note}
+
+## Receptacle Wiring Verification {toc}
+
+### A reversed hot-neutral, an open ground, or a bootleg ground is a latent hazard that is invisible until someone is shocked or equipment is damaged. {note}
+
+```datasheet
+label: Receptacle Wiring Verification Scope
+type: radio
+options:
+ - "100% of installed receptacles"
+ - "Statistical sample with 100% verification of any group containing a failure"
+default: "100% of installed receptacles"
+```
+
+### Every receptacle shall be tested after installation to confirm correct polarity, the presence and continuity of the equipment grounding connection, and the absence of reversed, open, or miswired connections, using a receptacle tester appropriate to the device type.
+
+### This verification is mandatory and not a sampling exercise.
+
+## GFCI Functional Test {toc}
+
+```datasheet
+label: GFCI Functional Test
+type: checkbox
+options:
+ - "Test-button trip of each GFCI device"
+ - "Verify downstream protected outlets de-energize on trip"
+ - "Verify reset restores power"
+ - "Verify self-test / end-of-life indication operates"
+default: "Test-button trip of each GFCI device"
+```
+
+### Every installed GFCI device, and every receptacle protected by an upstream GFCI device or breaker, shall be functionally tested.
+
+### The test shall confirm that the device trips when its test button is operated and, for the protected downstream outlets, that power is interrupted at the protected outlet when the upstream GFCI is tripped.
+
+### A GFCI that does not trip on its test function, or that trips but does not de-energize its load and downstream outlets, shall be replaced.
+
+## AFCI Functional Test {toc}
+
+### Each AFCI device and breaker shall be tested using its integral test function to confirm operation.
+
+### Where the AFCI provides a self-test, the self-test indication shall be confirmed.
+
+## Sensor Commissioning {toc}
+
+### Occupancy and vacancy sensors shall be commissioned after installation: coverage shall be walk-tested to confirm that the sensor detects occupancy throughout the intended area without dead spots and does not false-trigger from adjacent traffic or air movement, and the sensitivity and time-delay shall be adjusted to suit the space.
+
+### The as-left settings shall be recorded in the closeout submittals.
+
+# Installation {toc}
+
+## Mounting Height {toc}
+
+### The default heights below reflect common accessible-design practice (switches near 44 in. and general receptacles near 18 in. to center), but the governing heights are those on the drawings, which account for counters, casework, equipment, and accessibility requirements that vary by location. {note}
+
+```datasheet
+label: Standard Switch Mounting Height (to center)
+type: range
+unit: in
+drawing_ref: true
+options:
+ min: 36
+ max: 48
+ step: 2
+default: 44
+```
+
+```datasheet
+label: Standard Receptacle Mounting Height (to center)
+type: range
+unit: in
+drawing_ref: true
+options:
+ min: 15
+ max: 48
+ step: 1
+default: 18
+```
+
+### Device mounting heights shall be [[drawing: as indicated on the drawings]] and shall comply with the reach-range and operable-element requirements of the applicable accessibility standard.
+
+### Where the drawings do not indicate a height, devices shall be mounted at the standard heights established for the project.
+
+### Receptacles, switches, and operable controls in accessible spaces shall be located within the accessible reach range and shall not require tight grasping, pinching, or twisting of the wrist to operate.
+
+## Device Orientation {toc}
+
+### The NEC does not mandate a receptacle orientation, and both ground-up and ground-down are code-compliant. {note}
+### Horizontal mounting is used above counters and where details require it. {note}
+
+```datasheet
+label: Receptacle Orientation
+type: radio
+options:
+ - "Ground pin up"
+ - "Ground pin down"
+ - "Horizontal (above counters / as detailed)"
+default: "Ground pin down"
+```
+
+### Device orientation shall be consistent throughout the project; the project shall select one convention and apply it uniformly so the installation looks intentional.
+
+## Terminations {toc}
+
+### The termination is where most device failures originate. {note}
+### Screw (side-wire) terminals, with the conductor formed into a loop under the screw head and tightened to the device torque, are reliable and are acceptable on all grades. {note}
+### Back-wire clamp terminals, in which a screw drives a pressure plate against a straight inserted conductor, are preferred on specification- and higher-grade devices because they grip the full conductor cross-section under controlled pressure and accept larger conductors. {note}
+### Push-in terminations' small spring contact area is the leading cause of loose, overheating receptacle connections and they are limited to 15A and to small conductors. {note}
+### Over- and under-torque both produce unreliable connections. {note}
+
+```datasheet
+label: Device Terminal Type
+type: radio
+options:
+ - "Screw terminals (side-wire), conductor under screw head"
+ - "Back-wire clamp (screw-actuated pressure plate)"
+ - "Push-in / back-stab (spring contact)"
+default: "Back-wire clamp (screw-actuated pressure plate)"
+```
+
+### Push-in (back-stab) terminations, in which a conductor is pushed into a spring contact without a screw, shall not be used.
+
+### All screw-actuated terminations shall be tightened to the device manufacturer's published torque using a calibrated screwdriver or torque tool.
+
+## Grounding {toc}
+
+### Each device with an equipment grounding terminal shall be connected to the equipment grounding conductor of its branch circuit, and the connection shall comply with [[sync/grounding-and-bonding]].
+
+### Where a device is installed in a metal box, the grounding connection between the device, the box, and the equipment grounding conductor shall be made in accordance with NEC 250.146; a self-grounding device clip or a bonding jumper shall be used so that grounding does not depend solely on the device mounting screws contacting a painted strap.
+
+### Isolated-ground receptacles, where specified, shall be installed and identified per [[sync/grounding-and-bonding]].
+
+## Box Fill and Conductor Management {toc}
+
+### Devices shall be installed in outlet boxes sized for the conductors, devices, and fittings they contain in accordance with the box-fill calculation of NEC 314.16, using boxes complying with UL 514A or UL 514C per [[sync/raceways-and-conduit]].
+
+### Conductors shall be neatly formed and folded into the box without damage to insulation, and the device shall seat squarely without pinching conductors against the box edge.
+
+### Boxes shall be set flush with combustible finished surfaces and set back no more than the limit permitted by NEC 314.20 in noncombustible surfaces; gaps around the box shall be repaired so the plate seats flat.
+
+## Identification {toc}
+
+```datasheet
+label: Device Circuit Identification
+type: radio
+options:
+ - "Plate engraved/labeled with panel and circuit (designated devices)"
+ - "No device-level circuit labeling required"
+default: "No device-level circuit labeling required"
+```
+
+### Switches, receptacles, and sensors shall be identified where identification aids operation or maintenance.
+
+### Controlled receptacles shall be marked per the energy code.
+
+### Receptacles protected by an upstream GFCI shall be marked "GFCI Protected."
+
+### Emergency and critical-branch receptacles shall be identified by their distinct color and, where required, by engraved plates identifying the panel and circuit.
+
+### Receptacle and switch cover plates shall be labeled with the panel and circuit designation where required by the contract documents.
+
+# Delivery, Storage, and Handling {toc}
+
+## Wiring devices shall be delivered in the manufacturer's original packaging with listing marks intact and shall remain packaged until installed, so that devices are not soiled, painted over, or damaged during finish work.
+
+## Devices shall not be installed until the space is clean and dry and finish work that could soil or paint the device is complete.
+
+## Where devices must be installed before painting, they shall be protected so that paint does not enter the device or coat the strap, because paint on the mounting strap defeats the grounding path to a metal plate.
+
+## Devices contaminated by paint, joint compound, or other finish materials shall be replaced, not cleaned in place.
+
+# Warranty {toc}
+
+```datasheet
+label: Installation Warranty Period
+type: select
+options:
+ - "1 year from substantial completion"
+ - "2 years from substantial completion"
+default: "1 year from substantial completion"
+```
+
+## Devices that carry a manufacturer warranty against defects in materials and workmanship shall be warranted to the Owner.
+
+## The Contractor shall warrant the installation, including all terminations and the results of device testing, for the project warranty period.
+
+# Spare Parts {toc}
+
+## Spare devices ensure the Owner can replace failed or damaged devices with matching parts without procurement delay and without color or style mismatch. {note}
+
+```datasheet
+label: Spare Devices Provided to Owner
+type: select
+options:
+ - "None"
+ - "2% of each device type, grade, and color (minimum two each)"
+ - "5% of each device type, grade, and color (minimum two each)"
+default: "2% of each device type, grade, and color (minimum two each)"
+```
+
+## The Contractor shall provide spare devices and plates so that the Owner can replace failed or damaged devices with matching parts without procurement delay and without color or style mismatch.
+
+## Spare devices shall match the installed devices in type, grade, NEMA configuration, and color, and shall be delivered with matching wall plates.
+
+## Spares shall be labeled by type and color and turned over in a labeled container at substantial completion.