Inverter Output Circuit and DC GEC requirements [RE-wrenches]

[Mike Bernhard]

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Randy,
The answer to your first question is no.  Wire, including NM sheathed, must 
be protected.
Question  Don't think of it as a DC GEC.  It is the GEC for the primary side 
of the isolation transformer as well as whatever else you would like to call 
it  Separately derived systems in  Art 250.  The GEC can be attached to ANY 
building grounding electrode including cold water pipe (within 5 ft of where 
it comes into the building), building steel, Ufer, ground rod, plate, etc. 
Once again, Art 250, separately derived systems.
Mike Bernhard
----- Original Message ----- 
From: "Randy Hatch" <randy at third-sun.com>
To: <RE-wrenches at topica.com>
Sent: Monday, June 18, 2007 11:01 AM
Subject: Inverter Output Circuit and DC GEC requirements [RE-wrenches]


>
>
>            I was hoping that someone could help me to clear up a few items
> that I've been researching.
>
>
>
> 1)       Is the inverter output circuit conductor (utility interactive
> inverter) required to be in conduit?  NEC reference?
>
> 2)       Is the DC GEC required to be run from the inverter to:
>
> a.       The DC GE and then bonded to the AC GE (690.47(1))
>
> b.       the AC GE (690.47(2))
>
> What should I do for school and commercial installations where providing a
> dedicated DC GEC from the inverter/s to the AC grounding electrode system
> can be considerably more difficult in terms of pathing, distance, etc... 
> Is
> there a work-around?  NEC reference?
>
>
>
> Thanks.
>
>
>
> Randy Hatch
>
> Third Sun Solar and Wind Power
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
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