RSquirrel
Member
- Location
- Watsonville, CA, USA
- Occupation
- Mechanical Engineer (retired/consulting)
I have found numerous webpages that make the following identical statement in regard to sizing the main breaker for a load center:
“As per the NEC, divide the total wattage by 230 to get the total amperage.”
However, I find nothing in the NEC that specifically cites this "230" constant. I suspect that it should be replaced by whatever voltage is supplied to the panel (e.g. 208, 240, etc.) but have no evidence that this is the case. Can someone elaborate on 230 being some NEC-specified constant, vs. whether or not my suspicion is correct?
“As per the NEC, divide the total wattage by 230 to get the total amperage.”
However, I find nothing in the NEC that specifically cites this "230" constant. I suspect that it should be replaced by whatever voltage is supplied to the panel (e.g. 208, 240, etc.) but have no evidence that this is the case. Can someone elaborate on 230 being some NEC-specified constant, vs. whether or not my suspicion is correct?