AC/DC-FAN
Member
- Location
- Austin, TX
- Occupation
- Electrical Designer
I'm designing a UL-508A 480VAC motor control panel. Are there any limitations per UL 508A or NEC bringing a #8 AWG 480VAC feeder from load side of my main fused disconnect protecting the panel directly down to the line side of my first branch circuit motor feeder breaker and then jumpering #12 AWG 480VAC from that first breaker to multiple other branch circuit motor feeder breakers? The #8 AWG Feeder from the load side of my panel main is sized properly per NEC accounting for 125% of largest OPD + sum of all other motor FLA's. The #12 AWG Feeders jumpering to the other OPD's protecting the smaller motor circuits are sized for the sum of those motor FLA's as well. I know I've seen this type of jumpering done many times in the past but want to be sure I'm doing it correct per code. I'd like to not use a Power Distibution Block.