ECN Forum Forums General Topics of the Trade General Discussion Area feeder protection

Is the secondary feeder from a 75 kva xfrm protected from the primary breaker? I have a 100 amp 480 v breaker on the primary with a 200 amp 208 v secodary to a panel. Do I need a 200 amp main or can I use main lug and have the 100 amp breaker protect the 200 amp feeder?

[This message has been edited by carranoelectric (edited 08-29-2006).]

NEC 2002 240.21(C)(1) says you need a breaker on the secondary within a limited distance.