steve blackmon
Member
- Location
- Granbury,texas
I understood from my last code update seminar that now the feeder size to a panel must match the bus rating of the panel? am I wrong?
nec feeder ampacity vs panel bus rating
- Thread starter steve blackmon
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mdshunk
Senior Member
- Location
- Right here.
No !
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
C3PO said:
As long as the panel bus rating is greater than or equal to the feeder overcurrent protective device setting/rating you are ok.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
C3PO said:
I was positive you did.:smile:
I have been watching too many conventions on TV and I am getting gun-shy about "sound bites" being used out of context.
chevyx92
Senior Member
- Location
- VA BCH, VA
Are you sure? I would say as long as the rating of panel or bus bars are equal to or greater that feeder ampacity then it's ok.mdshunk said:
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
A few years ago I did a load calculation and ended up deciding that a 800A breaker was the answer (I think the calculated load was like 610 amps).
The electrician hooked up the machine to a 400A feeder. It actually never pulled much more than 300 amps.
The electrician hooked up the machine to a 400A feeder. It actually never pulled much more than 300 amps.
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