I am looking at a 3Amp rated circuit breaker, and the datasheet given below of the derating factor, and trip time in second. The average office temperature is 71F.
Cable Current rating = Rated current of the circuit breaker * derating factor at 73.4 F
= 3 * 1 = 3Amp
So, for circuit breaker, does that mean that it can handle upto 3amp or do I need to do subtract it (original rating - the derating = 3 - 3 = 0)
I don't know why but I think I need to subtract the derating to the current rating but I believe that's wrong.