Mike Lang
Senior Member
- Location
- New Jersey
In what situation can you not derate the first 200 amps on the service neutral? was that for commercial ?
help I forgot
- Thread starter Mike Lang
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I wouldn't say you can automatically reduce the neutral in any service situation. 220.61(B) allows a reduction in MOST, but not all situations.
A commercial building with non-linear loads would be less likely to allow a reduction.
A commercial building with non-linear loads would be less likely to allow a reduction.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I don't quite understand your question. Can you rephrase it? Are we talking about art. 250.24(C)(1)
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Mike Lang
Senior Member
- Location
- New Jersey
nevermind it didn't come up in the NJ test yesterday. I was just reviewing and I saw in a tom henry book about not touching the first 200 amps on a service for derating the neutral. It was for a residential service too. Not too many residential services that draw close to that in the real world. The test was worded pretty akward and I doubt they even understood most of what they were trying to say when writing it.
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