Apprentice path · Stage 11: Grounding and bonding · Lesson 36

Neutral and equipment ground

A neutral is a working conductor that carries current in normal operation. An equipment grounding path is for faults. They are not the same thing and they do not do the same job.

Why this matters on the job

The one that gets people is the white conductor. It looks harmless, it is called neutral, and under load it is carrying the full current of the circuit.

How to think about it

  1. A neutral can carry normal load current.
  2. An equipment grounding path serves fault protection.
  3. Treat both as potentially hazardous until they have been properly verified.

Worked through

Think about when each one is doing something. The neutral is working the whole time the load is on -- current goes out on the ungrounded conductor and comes back on the neutral. The equipment grounding path does nothing at all until something fails, and then it is the path that lets fault current flow and the protection operate.

Check yourself: You find a white conductor. Is it safe to touch?

Answer: No. A white conductor is not automatically safe to touch.

A neutral carries normal load current, so it is a working conductor, not a dead one. And a white conductor in an unfamiliar installation is not guaranteed to be a neutral at all until it has been verified.

Watch out for: Reading colour as a test result. Colour is an intention recorded by whoever installed it. Verification is a measurement you take yourself.
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Written from the owner's poster for this lesson. Nothing added beyond what the poster states.

Written for Texas apprentices as free study material. The Texas apprentice licence is an application, not an exam (Occupations Code 1305.161), and nothing here counts as apprenticeship hours or continuing-education credit. VoltMark is not affiliated with, endorsed by, or sponsored by NFPA, PSI, TDLR, or any state or local licensing authority. Always follow your employer's safety programme and your supervising electrician.