1 Scope

NOTE This standard governs the electrical service entrance: the equipment and conductors that carry electrical power from the utility point of delivery to and through the service disconnecting means for a building or structure. (1.1)

NOTE The service entrance is the legal and physical boundary between utility-owned infrastructure and customer-owned premises wiring. (1.2)

NOTE Everything downstream of the service disconnect — the building's feeders, branch circuits, and distribution equipment — is governed by other standards. Everything upstream of the point of delivery is the serving utility's responsibility under IEEE C2 (NESC), not the National Electrical Code, and is not in the contractor's scope except for the coordination, conduit, and mounting provisions this standard requires. (1.3)

1.4 Service equipment furnished and installed under this standard shall be listed and labeled for use as service equipment.

1.5 The work shall comply with NFPA 70 (NEC) Article 230, the serving utility's electric service requirements manual, and the authority having jurisdiction.

1.6 Where the serving utility's published requirements are more restrictive than this standard, the utility's requirements shall govern for all equipment on the utility side of the point of delivery, including metering provisions.

NOTE Utilities maintain approved-equipment lists, meter-socket jaw configurations, current-transformer ratios, and mounting-height rules that override a generic specification. Confirming these before rough-in is a recurring source of rejected work when skipped. (1.7)

NOTE This standard does not cover automatic transfer switches or generator connections made at the service entrance. (1.8)

1.9 Automatic transfer switch and generator connection arrangements at the service entrance shall be specified separately and coordinated with this standard.

2 Referenced Standards

2.1 Equipment, materials, and installation shall comply with the latest adopted edition of each of the following unless a specific edition is cited.

2.2 Where referenced standards conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.

Standard	Title
NFPA 70	National Electrical Code (Article 230 — Services)
NFPA 70E	Standard for Electrical Safety in the Workplace
IEEE C2	National Electrical Safety Code (NESC)
UL 869A	Reference Standard for Service Equipment
UL 414	Meter Sockets
UL 67	Panelboards
UL 489	Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures
UL 98	Enclosed and Dead-Front Switches
NEMA 250	Enclosures for Electrical Equipment (1000 Volts Maximum)
ANSI/NEMA PB 2	Deadfront Distribution Switchboards
ASCE 7	Minimum Design Loads and Associated Criteria for Buildings and Other Structures

3 Utility Coordination and Point of Delivery

NOTE The point of delivery (POD) is the location where the serving utility's conductors terminate and ownership transfers to the customer. (3.1)

NOTE For an overhead service, the POD is typically the service-drop attachment point at the weatherhead. For an underground service, it is typically the secondary terminals of the utility transformer or a designated junction. The POD divides NESC-governed (utility) work from NEC-governed (customer) work; misplacing it produces scope disputes and double-counted or orphaned equipment. (3.2)

3.3 The point of delivery shall be as indicated on the electrical site plan.

3.4 The Contractor shall obtain the serving utility's current electric service requirements manual before specifying or ordering any service equipment.

3.5 The Contractor shall submit the utility service application and obtain utility approval of the service-entrance arrangement before commencing rough-in.

3.6 The available fault current at the service point shall be requested in writing from the serving utility during design.

NOTE An assumed or rule-of-thumb fault current is not an acceptable basis for service-equipment selection. The AFC sets the minimum short-circuit current rating (SCCR / AIC) for all service equipment. Specifying equipment with an AIC below the actual utility fault current is a safety defect, not merely a code violation; it cannot be discovered by inspection of a nameplate alone and must be designed against from a utility-furnished value. (3.7)

3.8 The metering arrangement — self-contained (socket) metering or current-transformer (CT) metering — shall be coordinated with the serving utility, and CT ratios shall match the utility's revenue meter and data-acquisition requirements.

3.9 Utility easement and right-of-way constraints for underground lateral routing and transformer pad placement shall be coordinated with the civil and site work before the service location is fixed.

3.10 The service entry type shall be as indicated in the datasheet.

Service entry typeradio

○ Overhead service drop (weatherhead and riser)

○ Underground service lateral

Per drawings — electrical site plan (deferred by default)

4 Service Characteristics

4.1 The service voltage, phase configuration, and number of wires shall match the serving utility's available distribution and the building's calculated load.

NOTE Three configurations dominate low-voltage services: 120/240 V single-phase three-wire (most residential and light commercial), 120/208 V three-phase four-wire (commercial with mixed lighting and three-phase motor load), and 277/480 V three-phase four-wire (larger commercial and industrial, where 277 V lighting and 480 V motors reduce conductor size and losses). Three-wire delta and high-leg delta services remain in service on older commercial and industrial premises and are still offered by some utilities. (4.2)

4.3 The main disconnect voltage rating shall match the system voltage per NEC 230.82.

4.4 A single service shall supply the building unless the conditions of NEC 230.2 for additional services are met and documented.

4.5 The service voltage and phase configuration shall be as indicated in the datasheet.

Service voltage and phaseradio

○ 120/240 V 1Φ 3-wire

○ 120/208 V 3Φ 4-wire

○ 120/240 V 3Φ 4-wire (high-leg delta)

○ 240 V 3Φ 3-wire (delta)

○ 277/480 V 3Φ 4-wire

○ 480 V 3Φ 3-wire (delta)

Per drawings — one-line diagram (deferred by default)

4.6 The service ampacity shall be as indicated in the datasheet and shall be not less than the calculated load determined under NEC Article 220.

Service ampacity (main disconnect rating)range

A

60100125150200225300400600800100012001600200025003000400050006000

Per drawings — one-line diagram (deferred by default)

4.7 The utility-declared available fault current at the service point shall be as indicated in the datasheet.

Available fault current (utility-declared, symmetrical)range

kA

5200

Per drawings — one-line diagram (deferred by default)

4.8 The service-equipment short-circuit current rating (SCCR / AIC) shall equal or exceed the utility-declared available fault current at the service point.

Minimum equipment short-circuit current rating (AIC)range

kAIC

10141822253542506585100150200

NOTE The equipment rating is selected as the first standard interrupting rating at or above the utility-declared fault current, so no rating is correct for every project and the field carries no default. (4.9)

5 Submittals

5.1 Action Submittals

5.1.1 The Contractor shall submit the following action submittals for review before fabrication or ordering:

Product data for service equipment, meter sockets, CSEDs, and disconnecting means, with listing marks and SCCR ratings.
Shop drawings showing the complete service-entrance arrangement, conductor routing, conduit sizes, and equipment dimensions.
Service-entrance conductor sizing calculations per NEC 230.42, including adjustment and correction factors.
Available-fault-current documentation from the utility and the corresponding equipment SCCR.
Evidence of compliance with the serving utility's approved-equipment list and metering requirements.

Action submittals requiredcheckbox

☑ Product data (service equipment, sockets, disconnects)

☑ Shop drawings (service-entrance arrangement)

☑ Conductor sizing calculations

☑ Available-fault-current documentation

☑ Utility approved-equipment compliance

5.2 Informational Submittals

5.2.1 The Contractor shall submit the following informational submittals:

The serving utility's service application and written service approval.
Manufacturer's installation instructions for service equipment and meter enclosures.
Field test reports for ground-fault protection of equipment, where GFPE is provided.

Informational submittals requiredcheckbox

☑ Utility service application and approval

☑ Manufacturer installation instructions

☐ GFPE field performance test report

5.3 Closeout Submittals

5.3.1 The Contractor shall submit the following closeout submittals:

Record drawings showing the as-installed service-entrance arrangement and conductor routing.
Final arc-flash and equipment labeling documentation per NFPA 70E.
Warranty documentation for the service equipment.

Closeout submittals requiredcheckbox

☑ As-installed record drawings

☑ Arc-flash and equipment labels

☑ Warranty documentation

6 Quality Assurance

6.1 Service equipment shall be listed and labeled to UL 869A or the applicable individual product standard (UL 414 for meter sockets, UL 67 for panelboards in CSEDs, UL 489 for molded-case breakers, UL 98 for fusible switches).

6.2 The installer shall be a licensed electrical contractor experienced in service-entrance work and acceptable to the serving utility for metering installations.

6.3 The Engineer of Record shall verify that the equipment SCCR shown on submittals equals or exceeds the utility-declared available fault current before approving the equipment for fabrication.

6.4 All service equipment shall bear the labeling required by NEC 110.24 for available fault current and the date of calculation.

7 Environmental and Service Conditions

7.1 The service-equipment enclosure rating shall suit the installed environment.

NOTE Outdoor and exterior-wall installations require a minimum NEMA 3R rainproof enclosure. NEMA 1 general-purpose enclosures are acceptable only indoors in dry locations, and NEMA 12 is the indoor industrial choice where airborne dust and falling liquids are present. Wet, washdown, coastal, or chemically corrosive environments require NEMA 4 or NEMA 4X (stainless or non-metallic). Specifying NEMA 1 for an exterior meter socket is a common and avoidable inspection rejection. (7.2)

7.3 Equipment shall be rated for the ambient temperature range and altitude of the installation.

7.4 Conductor ampacity shall be corrected for ambient temperature per NEC Article 310.

7.5 The enclosure environmental rating shall be as indicated in the datasheet.

Enclosure environmental ratingradio

○ NEMA 1 (indoor, dry)

○ NEMA 3R (outdoor, rainproof)

○ NEMA 4 (watertight)

○ NEMA 4X (watertight, corrosion-resistant)

○ NEMA 12 (indoor industrial, dust-tight)

NOTE The enclosure rating is an assessment of the actual installation environment made by the Engineer; indoor and outdoor service entrances are both routine, so no rating is correct for every project and the field carries no default. (7.6)

8 Service-Entrance Conductors

8.1 Service-entrance conductors shall be sized to carry the calculated load per NEC 230.42.

NOTE Conductor ampacity is determined from the Article 220 load calculation for commercial work, or from NEC Table 310.12 for single-phase dwelling services (which permits an 83% demand factor). The 2023 NEC restructured 230.42 into subsections (A)(1) and (A)(2), clarifying how continuous/noncontinuous load factors and the ampacity adjustment and correction factors are applied — an update that can increase the required conductor size relative to prior editions. (8.2)

8.3 Service-entrance conductors shall not be smaller than required for a 100 A service for a one-family dwelling per NEC 230.79(C).

8.4 Where aluminum conductors are used, the service-equipment terminations shall be listed for aluminum (AL/CU).

8.5 Aluminum conductor connections shall be made with antioxidant compound and torqued to the manufacturer's published values.

NOTE Aluminum is routinely specified for service conductors on cost and weight grounds, but a copper-only termination on aluminum conductors, or an untreated/under-torqued aluminum connection, produces a high-resistance joint that overheats. Confirming the termination rating is a specification responsibility, not a field assumption. (8.6)

8.7 Conductors installed in conduit shall comply with the conduit-fill limits of NEC Chapter 9, Table 1.

8.8 The service-entrance conductor material shall be as indicated in the datasheet.

Service-entrance conductor materialradio

○ Copper

○ Aluminum

NOTE Copper and aluminum service-entrance conductors are both routinely specified and procurable; the choice turns on installed cost, available raceway size, and the owner's maintenance preference, so the field carries no default. (8.9)

8.10 The conductor insulation type shall be as indicated in the datasheet and shall be listed for the wiring method and for wet locations where the raceway is in a wet location.

Conductor insulation typeselect

XHHW-2

RHW-2

THWN-2

USE-2 (underground)

SEU cable (service-entrance, unarmored)

SER cable (service-entrance, round)

8.11 The service-entrance conductor size shall be as indicated in the datasheet.

Service-entrance conductor sizetext

Enter value...

Per drawings — one-line diagram (deferred by default)

9 Overhead Service

9.1 Where an overhead service is provided, a weatherhead shall terminate the service-entrance raceway above the service-drop attachment.

9.2 Drip loops shall be formed in the service-entrance conductors at the weatherhead.

NOTE The weatherhead and conduit riser carry the service-entrance conductors from the meter up to the utility's service-drop splice. The drip loop and the weatherhead's downward-facing, gasketed openings keep water from tracking into the raceway and the meter enclosure. (9.3)

9.4 The service-drop point of attachment shall be not less than 3.0 m (10 ft) above finished grade at the electrical service-entrance conductors per NEC 230.26.

9.5 Overhead service-drop conductors shall maintain the minimum vertical clearances above grade, driveways, and roadways established by the NEC and NESC.

NOTE The governing minimums are 3.0 m (10 ft) above grade at the service point, 3.7 m (12 ft) above residential driveways, and 5.5 m (18 ft) above public streets and roads. These are utility-side (NESC) clearances that constrain where the attachment and riser can be placed; they must be confirmed against site conditions before the riser location is fixed. (9.6)

9.7 The service-drop attachment height shall be as indicated in the datasheet.

Service-drop attachment height above graderange

ft

1030

Per drawings — electrical riser diagram (deferred by default)

9.8 The riser conduit material shall be as indicated in the datasheet.

Riser conduit material (overhead)select

Rigid metal conduit (RMC)

Intermediate metal conduit (IMC)

Rigid PVC Schedule 80

NOTE Rigid metal conduit is the default because it satisfies every serving utility's riser requirement and needs no evaluation for physical damage; IMC and Schedule 80 PVC are accepted by many utilities and are selected where weight or corrosion argues for them. (9.9)

10 Underground Service

10.1 Where an underground service lateral is provided, the service-entrance conductors shall be installed in raceway or as listed underground cable.

10.2 Underground conductors shall be type USE-2 or installed in raceway with conductors listed for wet locations, since the interior of an underground raceway is a wet location.

NOTE A duct-seal or listed sealing fitting at the building entry is required by code and is frequently omitted; without it, soil gases and condensation track into the service equipment and corrode terminations. (10.3)

10.4 The underground raceway material shall be as indicated in the datasheet.

Underground raceway materialselect

Rigid PVC Schedule 40

Rigid PVC Schedule 80

Rigid PVC in concrete-encased duct bank

HDPE duct

Intermediate metal conduit (IMC)

Rigid metal conduit (RMC)

NOTE The raceway material for an underground lateral is normally dictated by the serving utility's service requirements manual and by the burial condition, so no material is correct for every project and the field carries no default. (10.5)

10.6 Cover over the underground service lateral shall be not less than required by NEC Table 300.5 for the wiring method and installation condition, and shall be not less than the cover indicated in the datasheet.

Minimum cover (underground service)range

in

648

NOTE The minimum cover depends on the wiring method: 600 mm (24 in.) for direct-buried USE-2 cable, and 450 mm (18 in.) for rigid nonmetallic conduit at residential and light-commercial services. Schedule 40 PVC at 600 mm (24 in.) depth is the most common arrangement. Rigid metal conduit, IMC, HDPE duct, and concrete-encased ducts each have their own listed cover values, and cover under a building slab or a roadway differs again — so the field carries no default and the NEC table governs the floor. (10.7)

10.8 Underground lateral routing shall be as indicated on the electrical site plan.

11 Metering

11.1 A meter socket or metering enclosure shall be provided in conformance with the serving utility's requirements, listed to UL 414, and positioned for the utility's access.

NOTE The meter socket type — ringless or ring-type, four-jaw or five-jaw, single-position or multi-position — is dictated by the serving utility, not the engineer. Self-contained (socket) metering is used up to 200 A class; larger services and many commercial services use CT metering, where current transformers feed an instrument-grade meter socket. Specifying a socket configuration the utility will not accept forces a field change at the worst possible time. (11.2)

11.3 Self-contained meter sockets shall be provided with a bypass provision where required by the serving utility to permit meter replacement without interrupting service.

11.4 For services above the self-contained metering limit, a current-transformer metering compartment shall be provided with CT ratios matched to the utility's revenue meter.

11.5 Multi-tenant buildings requiring individual tenant metering shall be provided with gang (multi-position) meter stacks, with each position rated for the tenant service ampacity.

NOTE Two- through six-position meter stacks serve small multifamily and multi-tenant buildings, each position typically 100 A to 200 A; modular metering centers extend the same arrangement to considerably larger unit counts. Each tenant position is a separate service or a separate disconnect grouping and must be labeled to identify the load served. (11.6)

11.7 The metering type shall be as indicated in the datasheet.

Metering typeradio

○ Self-contained socket meter (200 A class)

○ CT metering (current-transformer compartment)

○ Multi-position gang meter stack

Per drawings — one-line diagram (deferred by default)

11.8 The meter socket configuration shall be as indicated in the datasheet.

Meter socket configurationradio

○ Ringless

○ Ring-type

NOTE The socket configuration is set by the serving utility's approved-equipment list rather than by the Engineer, so the field carries no default and is answered from the utility's service requirements manual. (11.9)

11.10 The number of metering positions shall be as indicated in the datasheet.

Number of metering positionsrange

position

124

Per drawings — one-line diagram (deferred by default)

11.11 The meter shall be mounted so the center of the meter is at the height above finished grade indicated in the datasheet.

Meter center height above finished graderange

ft

36.5

NOTE Serving utilities publish their own meter-height window — commonly between 1.1 m (3.5 ft) and 1.8 m (6 ft) to the meter center — so the height is read from the utility's service requirements manual and the field carries no default. (11.12)

12 Service Disconnecting Means

12.1 A means to disconnect all ungrounded service conductors from the building shall be provided per NEC 230.70.

NOTE The service disconnect is the building's main "off" switch and the dividing point at which utility power can be removed from the premises wiring. It may be a molded-case main circuit breaker (UL 489), a fusible switch (UL 98), or the main section of a service-entrance switchboard (ANSI/NEMA PB 2). (12.2)

12.3 The service disconnect shall be installed at the nearest practicable point to the entrance of the service conductors, either outside the building or inside nearest the point of entrance per NEC 230.70(A)(1).

NOTE Excess service-conductor length inside the building between the meter and the main disconnect is unprotected by the service overcurrent device and is a frequent inspection rejection. An exterior disconnect is preferred where practicable because it lets first responders de-energize the building without entering it. (12.4)

12.5 The service disconnect shall be legibly marked to identify it as the service disconnecting means and shall indicate the load served.

12.6 A single service disconnect should be provided for each service.

12.7 Multiple-disconnect groupings shall meet all conditions of NEC 230.71.

NOTE NEC 230.71 permits up to six service disconnects in a grouping for certain individual-occupancy arrangements, but a single main disconnect is the clearer and more defensible design for most commercial buildings and avoids ambiguity about which switch removes all service power. Multiple-disconnect groupings are best reserved for genuine multi-occupancy conditions. (12.8)

12.9 The disconnecting means shall be listed and rated for use as service equipment.

12.10 The service disconnect device type shall be as indicated in the datasheet.

Service disconnect device typeradio

○ Main circuit breaker (molded-case)

○ Main circuit breaker (insulated-case or power circuit breaker)

○ Fusible switch

○ Switchboard main section

NOTE A molded-case main breaker, a fusible switch, and a switchboard main section are all routinely specified service disconnects; the choice turns on the service ampacity, the interrupting rating required, and whether current-limiting fuses are wanted, so the field carries no default. (12.11)

12.12 The number of service disconnects shall be as indicated in the datasheet.

Number of service disconnectsradio

● Single main disconnect

○ Grouped disconnects (up to six, NEC 230.71)

13 Combination Service-Entrance Devices

13.1 Where a combination service-entrance device (CSED / meter-main) is provided, it shall integrate the meter socket and the service disconnect in a single listed enclosure rated for the service entry method.

NOTE A CSED combines the meter socket and the main breaker (and often a small panelboard) in one outdoor- or underground-rated enclosure. It is the standard arrangement for residential and light-commercial services up to about 400 A and reduces the conductor run between meter and disconnect to a minimum. (13.2)

13.3 A CSED shall not be specified for services above its listed maximum rating.

13.4 Services exceeding the CSED range shall use a separate meter socket and switchboard or switchgear arrangement.

NOTE Most CSEDs are listed only to 400 A. Specifying a single meter-main for a larger service is a recurring design error that surfaces as a procurement dead-end; above the CSED range the meter and the disconnect become separate assemblies. (13.5)

13.6 The service-entrance assembly type shall be as indicated in the datasheet.

Service-entrance assembly typeradio

○ Separate meter socket and main disconnect

○ Combination service-entrance device (CSED / meter-main)

○ Service-entrance switchboard section

Per drawings — one-line diagram (deferred by default)

14 Ground-Fault Protection of Equipment

14.1 Ground-fault protection of equipment (GFPE) shall be provided on each service disconnect rated 1000 A or more on a solidly grounded wye service of more than 150 V to ground but not exceeding 600 V phase-to-phase, per NEC 230.95.

NOTE In practice this means GFPE is required on 480Y/277 V services with a service disconnect of 1000 A or larger. GFPE detects a phase-to-ground fault that is too small to trip the overcurrent device quickly but large enough to do severe arcing damage, and it opens the disconnect on that ground current alone. The most common coordination failure is when the main switchboard is specified by a different section and GFPE is omitted because neither section claimed it. (14.2)

14.3 Whether ground-fault protection of equipment is provided shall be as indicated in the datasheet.

GFPE providedradio

○ Provided — required by NEC 230.95

○ Provided — elected below the NEC 230.95 threshold

○ Not provided — not required by NEC 230.95

NOTE Whether GFPE is mandatory follows from the service voltage and the disconnect rating, both of which are selected elsewhere in this datasheet; an owner may also elect GFPE below the code threshold. No answer is correct for every project, so the field carries no default. (14.4)

14.5 The GFPE maximum setting shall not exceed 1200 A, and the maximum time delay shall not exceed one second for ground-fault currents of 3000 A or greater, per NEC 230.95(A).

14.6 The GFPE pickup setting and time delay shall be as indicated in the datasheet and shall be coordinated with the project's protective device coordination study.

GFPE pickup settingrange

A

1001200

Per drawings — protective device setting schedule (deferred by default)

GFPE maximum time delay at ≥ 3000 Arange

s

0.11

Per drawings — protective device setting schedule (deferred by default)

NOTE See Protective Coordination StudyProtective Device Coordination StudyResolves to the current edition.sync/protective-coordination-study for the study that establishes these settings. (14.7)

14.8 A field performance test of the ground-fault protection system shall be performed when the equipment is first installed, per NEC 230.95(C), and the written results shall be submitted before energization.

NOTE The 230.95(C) test is a code requirement, not optional commissioning. It verifies, by primary or secondary current injection with calibrated equipment, that the GFPE actually trips at the intended pickup and time delay. Treating it as discretionary commissioning is a code violation. (14.9)

15 Emergency Disconnect

15.1 For one- and two-family dwelling units, an emergency disconnect shall be installed in a readily accessible outdoor location per NEC 230.85.

NOTE This is a 2023 NEC addition. It requires an outdoor disconnecting means even when the main service panel is indoors, so that first responders can de-energize a dwelling from outside. NEC 230.85 recognizes three arrangements, each with its own required marking: the service disconnect itself placed outdoors, a meter disconnect ahead of the service equipment, and a disconnect that is not service equipment. (15.2)

15.3 The emergency disconnect shall be legibly marked with the wording required by NEC 230.85 to identify its type and function.

15.4 The emergency disconnect arrangement shall be as indicated in the datasheet.

Emergency disconnect (one- and two-family dwellings)radio

○ Provided — service disconnect at an outdoor readily accessible location

○ Provided — meter disconnect ahead of the service equipment

○ Provided — emergency disconnect, not service equipment

○ Not applicable (occupancy other than one- and two-family dwelling)

NOTE The arrangement follows from the occupancy and from where the service equipment is placed, so the field carries no default. (15.5)

16 Enclosures and Mounting

16.1 Service-equipment enclosures shall be securely mounted to a structural surface or a freestanding rack rated for the equipment weight and the seismic conditions of the site per ASCE 7.

16.2 Outdoor-mounted service-equipment enclosures shall be rated NEMA 3R minimum.

16.3 The working clearances of NEC 110.26 shall be maintained in front of all service equipment.

NOTE Working-clearance violations — equipment crowded into an alcove, against a fence, or behind a door swing — are among the most common service-entrance rejections and are dangerous to maintain. The clearance depth, width, and headroom of NEC 110.26 must be reserved on the drawings, not discovered in the field. (16.4)

16.5 Service-entrance raceways and enclosures shall be bonded as required for service equipment.

NOTE Grounding electrode and bonding details are governed by Grounding And BondingGrounding and Bonding for Electrical SystemsResolves to the current edition.sync/grounding-and-bonding. (16.6)

16.7 The enclosure mounting arrangement shall be as indicated in the datasheet.

Enclosure mountingradio

○ Surface-mounted on building wall

○ Freestanding on rack or pad

○ Recessed (flush) in wall

Per drawings — electrical riser diagram (deferred by default)

17 Identification and Arc-Flash Labeling

17.1 Service equipment shall be field-marked with an arc-flash warning label and the available incident energy or required PPE category per NFPA 70E.

NOTE The arc-flash label tells anyone opening the equipment what hazard they face and what PPE is required. At the service entrance the available fault current is at its highest, so the incident energy can be severe; the label is both a safety requirement and a maintenance prerequisite. (17.2)

17.3 Each disconnect shall be permanently labeled to identify the load it serves and, where multiple disconnects are grouped, to identify it as one of a group of service disconnects.

18 Testing

18.1 Before energization, the Contractor shall verify torque on all service-conductor terminations to the manufacturer's published values and shall document the results.

18.2 Insulation resistance of the service-entrance conductors shall be tested before energization.

18.3 The service-entrance conductors shall be free of grounds and shorts.

18.4 Phase rotation shall be verified on three-phase services before connecting downstream equipment.

18.5 The pre-energization tests to be performed shall be as indicated in the datasheet.

Pre-energization tests requiredcheckbox

☑ Termination torque verification

☑ Insulation resistance test

☐ GFPE field performance test (where provided)

☑ Phase rotation verification (3Φ)

19 Installation

19.1 The service entrance shall be installed in accordance with the approved shop drawings, the manufacturer's installation instructions, NEC Article 230, and the serving utility's requirements.

19.2 Service-entrance conductors shall be continuous without splice from the point of delivery to the service disconnect except where splices are specifically permitted by NEC 230.46.

19.3 The length of service-entrance conductors inside the building ahead of the service disconnect shall be kept to the minimum practicable.

NOTE Conductors ahead of the service disconnect are not protected by the service overcurrent device, so every additional foot inside the building is unprotected and increases the fire exposure of an unfused fault. The code intent of "nearest the point of entrance" is to make this length as short as the construction allows. (19.4)

19.5 Underground raceways entering the building shall be sealed against the entry of moisture, gases, and vermin per NEC 230.8 after conductors are installed.

19.6 Equipment shall be installed plumb and level.

19.7 Field-installed service-equipment labels and arc-flash labels shall be applied before the equipment is placed in service.

20 Delivery, Storage, and Handling

20.1 Service equipment shall be delivered in the manufacturer's original packaging with listing labels intact and shall be inspected for transit damage on receipt.

20.2 Equipment shall be stored indoors in a clean, dry, conditioned space until installation; outdoor-rated equipment stored outdoors shall be protected from standing water and covered to exclude construction dust and debris.

20.3 Equipment shall be handled and lifted at the manufacturer's designated lifting points and shall not be lifted by bus, breakers, or meter jaws.

21 Warranty

21.1 The manufacturer shall warrant the service equipment against defects in materials and workmanship for the period indicated in the datasheet, and in no case less than one year from the date of energization or substantial completion, whichever is later.

Warranty periodrange

years

125

22 Spare Parts

22.1 The Contractor shall furnish spare fuses of each type and rating installed in fusible service equipment, in the quantity required by the project specifications.

22.2 For services with field-replaceable trip units or control power components, the Contractor shall furnish the manufacturer's recommended spare-parts list for owner stock.

22.3 The spare parts to be furnished shall be as indicated in the datasheet.

Spare parts to be furnishedcheckbox

☑ Spare fuses (each type and rating, fusible switches)

☐ Spare control-power fuses (GFPE/relays)

☑ Manufacturer recommended spares list