Re: Allowable temperature rise in Breakers
The following is from SquareD (type in temperature and select circuit breaker in the "drop down")
Another question on the same site says that the rise is over a 40 deg. C ambient.
What are the allowable temperature rise limits for circuit breaker parts? Customer is doing thermal imaging.
Answer UL Surface Temperature Rise Limits
Non-metallic 60 deg. C
Metallic 35 deg. C
UL Terminal Temperature Rise
80% Rated CB 50 deg. C
100% Rated CB 60 deg. C
The code only applies to T&M work....it does not apply to contract work.