Transformer Feeder Upgrade - 12/14/12 09:45 AM
Hello all,
Here's my dilema, I'm upgrading an exisiting building to a machine shop.
Currently it has a 400 Amp 3 phase 480 Main Service.It has a 227 KVA Transformer on a(480 volts) 200 Amp breaker feeding a 400 amp 208/120 three phase secondary panel.
I want to put the transformer (227 KVA) on a 400 breaker(Primary),and go to parallel 3/0 feeders for the primary side.
I want to add an additional 225 Amp panel and feed directly off the secondary taps on the transformer.The new 225 Amp panel would have a 225 Amp main breaker.
I'm thinking this is legal.
The 227KVA transfomer at 208 volts according to my calculations can handle 618 Amps.
Thanks for your help in advance
Here's my dilema, I'm upgrading an exisiting building to a machine shop.
Currently it has a 400 Amp 3 phase 480 Main Service.It has a 227 KVA Transformer on a(480 volts) 200 Amp breaker feeding a 400 amp 208/120 three phase secondary panel.
I want to put the transformer (227 KVA) on a 400 breaker(Primary),and go to parallel 3/0 feeders for the primary side.
I want to add an additional 225 Amp panel and feed directly off the secondary taps on the transformer.The new 225 Amp panel would have a 225 Amp main breaker.
I'm thinking this is legal.
The 227KVA transfomer at 208 volts according to my calculations can handle 618 Amps.
Thanks for your help in advance