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#91517 - 01/20/05 07:32 PM new service  
ccdave  Offline
Member
Joined: Jan 2003
Posts: 59
culver city,calif. usa
a new cell site requiring its own metered service, fed off an 480/277 3ph 4wire BUT the new service panel is only providing 460 to a transformer on the roof, can that be done per code? It is a 3ph 4 wire service panel, neutral is for the meter and only 2 phases are being used--thanks


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#91518 - 01/25/05 11:59 PM Re: new service  
tdhorne  Offline
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Joined: Mar 2001
Posts: 345
Maryland, USA
Quote
ccdave a new cell site requiring its own metered service, fed off an 480/277 3phase 4wire BUT the new service panel is only providing 460 to a transformer on the roof, can that be done per code? It is a 3 phase 4 wire service panel, neutral is for the meter and only 2 phases are being used--thanks

"an 480/277 3 phase 4wire" WHAT? Is it a service, a switchboard, panel? Is the service panel in your posting the source of the feeder to the roof? When you say only two phases are being used may I conclude that you mean that the feeder will be single phase derived between two of the ungrounded conductors of the wye connected service panel? If the answer is yes than I see no problem. Single phase circuits, such as the circuit supplying the rooftop transformer, are run from three phase panels all the time.
--
Tom H


[This message has been edited by tdhorne (edited 01-25-2005).]


Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison


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