PV Negative color [RE-wrenches]

[Mike Bernhard]

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Drake,
The White color does not indicate safe to an electrician.  There can be much 
voltage and current on a "neutral" (white) conductor.
Mike Bernhard
Full Spectrum Solar
----- Original Message ----- 
From: "Drake Chamberlin" <Drake.Chamberlin at redwoodalliance.org>
To: <RE-wrenches at topica.com>
Sent: Thursday, December 06, 2007 12:26 PM
Subject: PV Negative color [RE-wrenches]


>
> Hi Wrenches,
>
> I am revisiting the issue of what the color of the PV negative should be. 
> As a grounded circuit conductor, its color is required to be white.
>
> When a run from an array is protected by ground fault protection,  the 
> negative wire from the array is only grounded when the ground fault 
> breaker is "ON,"  or the GFDI fuse is not blown.  This breaker will trip, 
> or the fuse will blow, when a ground fault condition exists.
>
> My concern is that if the positive wire ground-faults, the negative will 
> become hot, in some cases up to 600 VDC.   Do we want this wire to be 
> white, which tells any electrician that the wire should be safe?
>
> Drake
>
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> 


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