Now we are asking a "debate" question.....
IF it is an FPE 15 amp breaker (stab-loc) it may "hold" at 100 amps for a few.....it also may hold at 35 for a while......
A 15 will trip at the rated current based on the time curve calculated by the factory.
Harold is correct that a cb can "hold" to allow motor start-up, that is also based on the time curve.
You can obtain time curve info from the mfg's, and there is a lot of time curve info at Bussman Fuses.
John
The 80% rule is used.
