[SPAM] PV Negative color [RE-wrenches]

erika at repowersolutions.com erika at repowersolutions.com
Thu Dec 6 12:28:36 PST 2007


Your concern is addressed by labeling per 690.5(C) not by color.
If if you have some GFP, the label should say something like:
ground fault is indicated when xxx, grounded conductors may be energized. 

erika

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-----Original Message-----
From: Drake Chamberlin [mailto:Drake.Chamberlin at redwoodalliance.org] 
Sent: Thursday, December 06, 2007 1:26 PM
To: RE-wrenches at topica.com
Subject: [SPAM] 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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