Greg1707
Senior Member
- Location
- Alexandria, VA
- Occupation
- Business owner Electrical contractor
I noticed that some circuit breakers have a rating marked on them of 40 degree C. I was surprised because I assumed all breakers would be a minimum of 60 degrees C. 310.16 does not have a column for 40 degrees. What are the implications of using these breakers with conductors with higher temperature rating?