PV Negative color [RE-wrenches]

[Drake Chamberlin]

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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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