delfadelfa
Member
- Location
- Cincinnati, OH
I'm bidding a job installing a 480v 3 phase 45kw generator for a warehouse UPS battery backup system. The UPS batteries only last 30 minutes so they want a backup for the backup. It will only be feeding one 200amp 208-120volt panel which is fed by a 12.5 kva transformer. The transformer sits on the warehouse floor by the panel and is fed by a 480volt overhead buss which is about 30 feet up. I'm planning on removing the feed to the transformer and installing it on the line side of a 100 amp 3 phase transfer switch. And then refeeding the transformer on the load side of the ATF. Then run about 200 feet of EMT to the generator, one run for the feed and one for the control wires. The generator has an 80 amp 3 phase breaker so I'm wanting to run #1 copper for the feed. I've installed a lot of 8 to 20KW generators for residential homes but never one this big and 3 phase. So my question is, do you see any problem with the way I'm planning on doing this install?