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#99990 10/02/06 11:57 PM
Joined: Nov 2004
Posts: 14
S
Member
Hello,

My costumer wants to power up some existing lights in a commerical
building that has the service disconnected and service wires removed. Six foot away is another building with power in it, my plans are to run a short span of triplex from one building to the other and supply the lights with a single 20 amp circuit. Is this installation ok if I supply a service rated disconnect and bond the ground to the existing equipment?

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#99991 10/03/06 12:02 PM
Joined: Jul 2004
Posts: 10,020
Likes: 37
G
Member
Just remember to isolate the neutral in the second building and this is pretty straight forward. Bond the EGC to the building grounding system, connect your lighting circuit to the disconnect from your feeder.


Greg Fretwell
#99992 10/03/06 06:50 PM
Joined: Jan 2005
Posts: 5,476
Likes: 3
Cat Servant
Member
And, of course, connect to the ground rod for the second building.

#99993 10/03/06 07:08 PM
Joined: Jun 2006
Posts: 613
M
Member
If you are using triplex to feed the second building you will not isolate the neutral and will be providing a new ground electrode connected to the new neutral. If you are housing livestock in the second building this is the only permissable way to do this unless a tingle voltage isolator is installed between the ground and neutral.
If you are feeding the second building with ACWU, teck90, pipe and wire then you may run a bonding conductor to the second building panel and isolate the neutral from the ground.

#99994 10/04/06 08:03 AM
Joined: Nov 2004
Posts: 14
S
Member
Thanks people,

Renosteinke, does the single circuit
EGC still connect to the ground rod?
250.32 (A) exception

#99995 10/04/06 12:34 PM
Joined: Mar 2001
Posts: 345
T
Member
You must bond the Equipment Grounding Conductor of the branch circuit to the existing Grounding Electrode System. If you run quad-plex you can use either a multi wire branch circuit or if it's thirty amperes or more you can use it as a single phase feeder to supply the existing equipment.
--
Tom Horne


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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