NEC wire sizing Q
NEC wire sizing Q
(OP)
Hi, folks,
I have a question regarding wire sizing per NEC.
UL requires hazardous voltage circuit conductors supplying one motor shall have an ampacity not less than 125% of the motor full load current rating. Does NEC have the same requirement? I found ampacity table 310-16 &17 in NEC 2005 but could not find the similar statement regarding if I need to use 125% factor.
Thanks in advance.
I have a question regarding wire sizing per NEC.
UL requires hazardous voltage circuit conductors supplying one motor shall have an ampacity not less than 125% of the motor full load current rating. Does NEC have the same requirement? I found ampacity table 310-16 &17 in NEC 2005 but could not find the similar statement regarding if I need to use 125% factor.
Thanks in advance.





RE: NEC wire sizing Q
RE: NEC wire sizing Q
RE: NEC wire sizing Q
Per UL, when the control panel of equipment is designed, do we need to size the wire according to Wiring Ampacity Table AND temperature test the wire, or do just one of the two requirments?
Thanks,