The basic principal behind the switch is to start the genset when loss of power is detected and then transfer. Without the start wires, it cannot start the generator. This is a constant problem in new startups because the designers/engineers forget this. Not uncommon for me. Also, the wires cannot be run in the same conduit as the emergency feeders. 20 requires independent control of the generator whether type 1 or 2 arrangement. I can't look up the sections but they're in there. Tom
I have looked in 70 and 20 and in the archives but I cannot find the requirement (at least where I can understand it) that "control wires" are required to run from the transfer switch to the emergency generator. There are not such wires on the Electrical Drawings and hence no wires were installed and the FP is 500' from the Genset. The GC is trying to prove to the owner why this should not be an issue for the Electrician but should have been on the Electrical drawings since it is required by code and is necessary for the proper transfer switch operation. The only thing I can find is in 20 10.8.3.6.2 and 10.8.3.13 (momentary switch to simulate loss of power). I think maybe the wires that are not there involve the momentary switch but I honestly do not know. If you can point me in the right direction it would help us help a friend and I would really appreciate it. Greg McGahan _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
