Just trying to figure out what the max OCPD breaker I can use on the following setup.
1) DC circuit
2) using a 4 wire 250 MCM aluminum direct burial cable.
3) 2 wires from the cable are to be paralleled. hence 2 sets of 250 MCM per phase.
4) MC is buried for approximately 30' and run exposed under solar panels for anywhere from 50' to 400'.
5) not sure how this plays into it but where the cables are underground there are anywhere from 8 to 16 of these cables grouped together. Should these cables be considered when de-rating.
1) DC circuit
2) using a 4 wire 250 MCM aluminum direct burial cable.
3) 2 wires from the cable are to be paralleled. hence 2 sets of 250 MCM per phase.
4) MC is buried for approximately 30' and run exposed under solar panels for anywhere from 50' to 400'.
5) not sure how this plays into it but where the cables are underground there are anywhere from 8 to 16 of these cables grouped together. Should these cables be considered when de-rating.