Electriman
Senior Member
- Location
- TX
I have a 30 kVA lighting transformer 480v/120-208V that will feed only a 5 kVA lighting loads.
The secondary breaker is sized 100 A but since my load is limited and I have only a few options(spare breaker) I was wondering if I can use a 30 A breaker (the highest existing breaker) to protect the primary feed of the transformer; even though, the secondary is rated 100 A. Is there any code requirement that limits me?
The secondary breaker is sized 100 A but since my load is limited and I have only a few options(spare breaker) I was wondering if I can use a 30 A breaker (the highest existing breaker) to protect the primary feed of the transformer; even though, the secondary is rated 100 A. Is there any code requirement that limits me?