My existing condition:
45KVA 480V primary with 60A fused protection and 208/120 secondary with 125A CB protection
maximum load that i measured on secondary:
A= 78Amps
B= 64Amps
C= 64Amps
Under these conditions the 125Amp breaker has tripped twice. my first question why would the 125A trip? worn out/Tired breaker?
if i am interpreting table 450.3B correctly, i can install a secondary OCPD 160A that is at maximum 125% of the transformer secondary rated current? Am i correct?
