jfplaniczka
Member
I have a piece of machinery which is suppose to have a 100 amp main breaker in the control panel.
This will be fed from a 480 volt 3 phase bus duct.
would i be correct in assuming that the wire size will be 3 awg thhn with a 8 awg ground?
also they originally told me that the machine was 54kw. so 54kw divided by 480= 112.5amps do you multiply that by 125%. doesn't seem to me that it would be 100 amp breaker inside there you know what i mean?
This will be fed from a 480 volt 3 phase bus duct.
would i be correct in assuming that the wire size will be 3 awg thhn with a 8 awg ground?
also they originally told me that the machine was 54kw. so 54kw divided by 480= 112.5amps do you multiply that by 125%. doesn't seem to me that it would be 100 amp breaker inside there you know what i mean?