Is there a code section that says the sum of the mains cannot exceed the rating of the service equipment? I could have sworn there was, but I seem to be missing it.
I've got an apartment-style service enclosure. It has three meters each with its own 200-amp disconnect. The termination cabinet and the bus are rated at 600 amps. I need to add a fourth 200-amp main/meter.
I know I can replace the whole thing with an 800-amp set-up. I could also gather load calcs and possibly replace all of the main breakers with 150-amp units - the building loads are quite small. Obviously the easiest and least expensive is to just add a fourth meter/main combo to the 600-amp equipment, but I'm confident that this is a code violation. I'm just missing it in the book.
Can someone point me in the right direction?
- Zorch
I've got an apartment-style service enclosure. It has three meters each with its own 200-amp disconnect. The termination cabinet and the bus are rated at 600 amps. I need to add a fourth 200-amp main/meter.
I know I can replace the whole thing with an 800-amp set-up. I could also gather load calcs and possibly replace all of the main breakers with 150-amp units - the building loads are quite small. Obviously the easiest and least expensive is to just add a fourth meter/main combo to the 600-amp equipment, but I'm confident that this is a code violation. I'm just missing it in the book.
Can someone point me in the right direction?
- Zorch