Transformers

[tacomafc]

What Is O.c.p. On The Primary Side Of A 45 Kva Transformer. The Voltage Is 480/277

 

[iwire]

What would you like it to be?

Any OCPD between 1 and 150 amps could be legal.

 

[teco]

54.1 amps. I use a 70 amp breaker.

 

[RUWired]

Any OCPD between 1 and 150 amps could be legal.

Bob, Table 450.3 does'nt allow rounding up over 250%. 135 amps would be the maximum if they made that size, otherwise i see it at 125 amps.
Rick

 

[iwire]

Bob, Table 450.3 does'nt allow rounding up over 250%.

Your right Rick, my error.