NEC Electrical Code for Re-Identifying Ungrounded Conductor
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How should I Identify Electrical Conductor Wiring? NEC Article 200.7 (C) Re-Identifying Ungrounded Neutral Conductors. © By: Dave Rongey |
How to Identify Electrical Circuit Wires
Electrical Repair Question: How should I Identify Electrical Conductor Wiring?
My electrical inspector told me I needed to “Re-identify all white conductors in cables used for ungrounded conductors”.
- I opened up the disconnect box he was talking about and found two white wires and two black wires and do not know which white wires to mark with black tape.
This home electrical question came from: Tammi, a Homeowner from Cary, North Carolina.
Additional Comments: great idea, hope it solves my issue.
Dave’s Reply:
Thanks for your electrical repairs question Tammi.
How to Identify Electrical Circuit Wires
NEC 200.7 (C) Re-Identifying Ungrounded Neutral Conductors
Re-Identifying Ungrounded Neutral Conductors for Electrical Wiring
Tammi, You have not identified the equipment that the inspection is referring to therefore I am unsure about the circuit that the inspection is referring to, as well concerning re-identifying the white conductors in the cables that are used, however pay close attention to the Cables that are used, and the Neutral wire conductors because this is what the inspector is concerned with. If the equipment and circuit is 240 volt and the circuit has been fed with a 2-wire cable with ground then the white wires that will be used as hots will need to be identified with black electrical tape. If the equipment and circuit is 120 volt then the Neutral wires should be identified with white electrical tape if needed. Keep in mind that your electrical inspector should be available by calling your local building department and you may ask for clarification about anything having to do with your project. If your inspector does not provide the help that you need then ask to speak to their supervisor or the manager of the building department.
- This NEC Article 200.7 (c) code reference may be helpful:
- NEC 200.7(C) Wiring Methods wiring – Where permanently re-identified at each location,
- Where it is visible and accessible.
- The conductor with white colored insulation in type NM cable may be used as an ungrounded conductor.
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- Electrical Code Directory covering AFCI circuit, electrical-boxes, electrical-circuit, electrical-code-outlets, electrical GFCI, electrical-grounding, electrical-project, electrical-services, electrical-underground, electrical-wiring, electrical-wiring-code, lighting-codes and smoke-detectors.
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