gporter
Member
- Location
- NW Pennsylvania
I would like to supply a small picnic pavilion with a 30 amp 120/240 volt feeder. The only loads would be lights and receptacles. Refering to 2002 NEC Section 225.39(B), the code requires that a feeder rated at 30 amps can supply a panel with a maximum of only 2 circuits on it. Restricting the number of circuits does not seem to make sense, if the feeder is sized according to the branch circuit and feeder calculation rules. My 2 circuits will never be able to reach 30 amps, so why the restriction?
For example:
120/240 volt feeder at 30 amps can supply 7200 v-a.
A single 120 v 20 a circuit will draw only 2400 v-a. Two of them will draw a maximum of 4800 v-a. So why does the code restrict you to only 2 circuits? I could understand this if my feeder was only 120 volt.
For example:
120/240 volt feeder at 30 amps can supply 7200 v-a.
A single 120 v 20 a circuit will draw only 2400 v-a. Two of them will draw a maximum of 4800 v-a. So why does the code restrict you to only 2 circuits? I could understand this if my feeder was only 120 volt.