Our designs at my company regularly incorporate a power distribution panel (PDP) and several other panels.
I have seen application of CBs to protect outgoing power (120VAC) from the PDP and then in the secondary enclosure on the same circuit another CB on the incoming power.
Occasionally when reviewing other drawings, I'll find a design that only has the CB in the PDP, and in the secondary enclosure will go right to devices.
It seems logical to me to design with a CB before and after the interconnect, but I'm wondering if there is any code in the NEC/NFPA79 that calls this out.
I have seen application of CBs to protect outgoing power (120VAC) from the PDP and then in the secondary enclosure on the same circuit another CB on the incoming power.
Occasionally when reviewing other drawings, I'll find a design that only has the CB in the PDP, and in the secondary enclosure will go right to devices.
It seems logical to me to design with a CB before and after the interconnect, but I'm wondering if there is any code in the NEC/NFPA79 that calls this out.
