Designing a 480 V panel
Designing a 480 V panel
(OP)
I designed a 480 V panel that will have total connected load of 160 A. The main breaker I specified for this panel was 250 A. But my supplier for the panel replied to me saying the minimum size of the main breaker in that panel that he can give is 400 A. On the other side, this 480 V panel will be fed by a 200 A CB which will be 225' away. I want to know if I supply a 400 A main breaker with a 200 A CB, am I violating the NEC ?






RE: Designing a 480 V panel
Best to you,
Goober Dave
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RE: Designing a 480 V panel
Thanks for your feedback. I cannot use a main lug only panel since the 200 A breaker is 225 feet away. Locking out the equipment will be hard in this case.
RE: Designing a 480 V panel
Best to you,
Goober Dave
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RE: Designing a 480 V panel
RE: Designing a 480 V panel
You need a new supplier that knows what he is doing...
"Will work for salami"
RE: Designing a 480 V panel
Why fused? You have a 200A breaker upstream for protection. Use a solid blade disconnect.
RE: Designing a 480 V panel