My consulting EE firm usually fully rates systems using a computer program. In looking over a contractor's shop dwgs for an office building, I saw that the 480v panels were *series rated* at 65kaic (ok) but the 208v panels are *fully rated* at 10kaic. Our calcs had the 208v panels at up to 20kaic. The manufacturer said that it was standard to rate 208v panels at 10kaic.
My question: is this a series rated system, and is it up to code? When the mfg's 3rd party tests for series rating, do they take voltage & transformers into account? Or in a series rated system, are all panels series rated @ 65kaic? Any input is helpful, thanks.
My question: is this a series rated system, and is it up to code? When the mfg's 3rd party tests for series rating, do they take voltage & transformers into account? Or in a series rated system, are all panels series rated @ 65kaic? Any input is helpful, thanks.