Can someone please provide a code reference for when it is required to have secondary
protection on a transformer (less than 600VAC and greater than 9 Amps)?
I am interested in utilizing FPN #2 & #3 of NEC Table 450.3 (B), but am unclear
on the intent of the phrase in FPN #2 that states: "Where...
I am working on a Power Distribution Unit where the ETL Listed Equipment has a 500A Main CB feeding
a 300kVA Delta-Wye Transformer (480: 208/120). The Transformer Secondary Feeds Six 225 Amp Molded Case
Circuit Breakers (ie. Primary Protection Only). What NEC Sections would pertain to the...
