Owner buys power at 24900 so everything on site feeders.
One building requires a Fire Pump.
Its Diesiel Mtr back up on the pump Mtr.( not Generator on that side)
Other side the feed is from 480 volt Building Switchgear (mc cable )fed in Cable tray with other feeders Fused as per Article 430.
Heres where it gets intersting!! The Mcc is fed by a Back up generator.
Since its Acually backed up on both sides,
LRC doesn't apply on Disconnect switch I;d say
(695.4 (b) NEC 2008,
But can the Breaker for the FP controler be in the Switchgear with all the other loads??
Can the cable from the Switch gear be in Cable tray with all the Normal power feeds???(2 hr required fire rateing))
The back up Generator for this building is located remoteley, feeding 4160 to a step dn transformer outside the building (dn to 480)
To make this Correct Where should this Normal feeder (on back up Generator be picked up??
I got a cpl ideas but want see what all you experts out there come up with.
