Conductors and Cables

Read revision 8

Revision 8 · Oct 12, 2026 +2 −2

P1 batch 3: knife gate valves, water storage tanks, water wells, cathodic protection and instrumentation cable now owned; bare-text mentions re-pointed to the new standards
Showing changes from Rev 7 to Rev 8 in Conductors and Cables.
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title: Conductors and Cables
category: Electrical
description: >
When to use: Building wire and cable for power, lighting, branch circuit, and feeder applications rated 600V and below in commercial, institutional, and industrial buildings. Covers single conductors installed in raceways and cable tray, Type MC metal-clad cable, and Type AC armored cable; conductor materials (copper and aluminum); insulation types (THHN/THWN-2, XHHW-2, RHW-2, USE-2); ampacity selection and derating; voltage drop; color coding and conductor identification; splicing, connectors, and terminations; pulling and installation; insulation resistance testing; and field acceptance.
− Not intended for: Grounding electrode conductors and equipment grounding conductors (see [[sync/grounding-and-bonding]]); raceway installation, support, and fill (see [[sync/raceways-and-conduit]]); service-entrance conductors and metering equipment; medium-voltage (above 600V) shielded cable systems, which are specified separately; motor control wiring, low-voltage control circuits, and instrumentation cable below 50V; communications, data, and low-voltage signal wiring; switchgear and switchboard internal wiring (see [[sync/low-voltage-switchgear]]); panelboard internal wiring (see [[sync/panelboards]]).
+ Not intended for: Grounding electrode conductors and equipment grounding conductors (see [[sync/grounding-and-bonding]]); raceway installation, support, and fill (see [[sync/raceways-and-conduit]]); service-entrance conductors and metering equipment; medium-voltage (above 600V) shielded cable systems, which are specified separately; motor control wiring, low-voltage control circuits, instrumentation cable below 50V, and low-voltage signal wiring (see [[sync/instrumentation-and-control-cable]]); communications and data cabling (see [[sync/structured-cabling]]); switchgear and switchboard internal wiring (see [[sync/low-voltage-switchgear]]); panelboard internal wiring (see [[sync/panelboards]]).
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- Service-entrance conductors and metering equipment
- Communications and data wiring (Category cabling, fiber optic)
−- Instrumentation and control wiring below 50V, and building automation system wiring
+- Instrumentation and control wiring below 50V (see [[sync/instrumentation-and-control-cable]]), and building automation system wiring (see [[sync/building-automation-system]])
- Flexible cords and cables (NEC Article 400)
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## Where the parties disagree whether a warranty-period failure results from workmanship, product defect, or building conditions such as moisture infiltration or chemical attack, the Engineer of Record shall make the initial determination.

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