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For questions about an [electrical-panel] that is fed from another [electrical-panel] instead of being fed directly by a utility service or separately derived service (such as a generator or inverter).

22 votes
3 answers
5k views

Why are all the neutral wires in a sub panel burnt or melted?

My barn had a small (6-space) main lug sub panel with four 20A 120V breakers and one 20A 240V breaker. The panel itself was protected by a 50A 240V breaker in the main service panel. It was wired up p …
Kurt Granroth's user avatar
5 votes
3 answers
2k views

Ground wire pass-through safety switch to sub panel?

I have an out-building 150+ feet from the main service panel with its own 240v 60 amp sub panel. It is powered via a four wire bundle going through underground conduit -- 2 x 120v feeders, 1 neutral, …
Kurt Granroth's user avatar