tryinghard
Senior Member
- Location
- California
I don?t have my ?08? book with me just ?05?, for some reason I thought I?d need a smaller main breaker in a subpanel ?B? directly below a 15kva XFMR? I do need to apply ?08?.
Specifically I have a 125a 480v 3ph 3w panel ?A? with a 20a breaker feeding a 15kva XFMR which is 480-120/240v feeding a 125a rated panel with a calculated load of 36a. As far as ?08? goes does 408.36(B) require a main breaker in panel ?B? no greater than 40a, I?m looking now and see the OCP for the XFMR at the primary 20a meaning a main may not even be required in panel ?B? at all?
Panel ?A? is physically next to the XFMR which is next to panel ?B?.
Specifically I have a 125a 480v 3ph 3w panel ?A? with a 20a breaker feeding a 15kva XFMR which is 480-120/240v feeding a 125a rated panel with a calculated load of 36a. As far as ?08? goes does 408.36(B) require a main breaker in panel ?B? no greater than 40a, I?m looking now and see the OCP for the XFMR at the primary 20a meaning a main may not even be required in panel ?B? at all?
Panel ?A? is physically next to the XFMR which is next to panel ?B?.