Michael15956
Senior Member
- Location
- NE Ohio
Chris6245 said:So by this you mean that terminating NM to a 75C breaker is also a violation? Isn't NM only rated at 60C?
Chris,
No, the above is not what I meant.
"In a nutshell," the NEC sets the determination of termination of equipment under 110.14(C)(1)(a) and (C)(1)(b). This sections states that T310.16 shall be used for conductor ampacities. It further provides termination provisions for equipment under 100A and equipment for over 100A. Also, stated under (a)(3) and (b)(2), "Conductors with higher temperature ratings if the equipment is listed and identified for use with such conductors." What this means is that the 90C column for NM can be used for conductor ampacities if all the equipment/connections/terminations/splices/CB etc. within that circuit are also rated for 90C.
Hope this helps,
Michael