transformer

[mickeyrench]

a company has 2 200amp 3phase 240 delta services for its building . it use to be 2 companies. the owner has 2 new pieces of equipment thats rated for 3 phase 480 volts @ 100 amps. and the other at 25amp. 480 volt. one is a type of electric dryer the other is a chiller. what would be the best way to supply 480 volt power to these 2 pieces of equipment? transformer or new service? thanks for any help.

 

[jim dungar]

I vote for a new single service. It looks like your 100A 480V load will exceed one of your 200A 240V services.

 

[kingpb]

New 480V service. Make sure the AHJ is OK with it. Code requires approval for multiple services. May have to add some warning signs.