neutral and ground in the ground? [RE-wrenches]

[Todd Cory, Mt. Shasta Energy Services]

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If I run power from a main service disconnect (where ground and neutral are
bonded) to a separate building, where ground and neutral will also be bonded
with a separate ground rod and water bond, I run 3 wires... hot, hot, neutral...
no ground.

Todd



Matt Tritt wrote:

> Geoff,
> If you check your NEC book I believe you'll find that all conduits carrying
> live circuits are required to include a ground wire and, since this is a
> split-phase system, it won't work so great without the neutral.
>
> Again, refer to your NEC for allowable wire sizing and any other questions
> you might have.
> Good luck.
>
> Matt T
> ----- Original Message -----
> From: "Geoff Greenfield" <Geoff at Third-Sun.Com>
> To: <RE-wrenches at topica.com>
> Sent: Thursday, June 17, 2004 5:47 AM
> Subject: neutral and ground in the ground? [RE-wrenches]
>
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>
> I am getting different answers from the EE and the inverter manufacturer on
> this one, so I throw it out to this list as well:
>
> The situation:  A Vanner RE-4500 utility interactive inverter (120/240 VAC
> output) is currently operating stand alone (with minimal and often no loads,
> ground rod and grounded neutral at AC panel).  The scope of the project is
> to trench 1,100 feet and tie the system into the grid at a building's load
> panel in order to "sell" excess power.
>
> The question:  What wires do I need?  Obviously L1 and L2, but what about
> neutral and what about ground?
>
> Obviously, I want to do this right and safely, but with 2/0 wire at today's
> prices I don't want to be wasteful. If I do need a ground and or neutral,
> what about under sizing them?  Amps is only 18-20 peak, wire sized 2/0 for
> line loss.
>
> The EE on this project thinks we can skip the ground and isn't sure of the
> neutral.
>
> Hope someone can help me out on this... I'm even thinking of calling John
> Wiles...
>
> Sincerely,
>
> Geoff Greenfield
> NABCEP Certified Solar PV Installer TM
> GLREA Certified Photovoltaic Systems Integrator/Installer License Number
> 0211-01
>
> THIRD SUN SOLAR AND WIND POWER Ltd.
> 340 West State Street, Unit 25
> Athens, OH 45701
>
> Phone (740) 597-3111
> Fax   (740) 597-1548
>
> www.third-sun.com
>
> End of RE-wrenches at topica.com digest, issue 1482
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--
Todd Cory
KE6SXS
toddcory at finestplanet.com
Mt. Shasta Energy Services
License C-10 # 811428
P.O. Box 689
Mt. Shasta, CA. 96067
(530) 926-1079
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