[RE-wrenches] double insulated wire

[Will White]

As far as I understand it doesn't matter which color you use for which conductor as long as it isn't white, gray, or green.

We have different crews using different colors but I think black and either blue or red is the most common.

Thanks,
Will

From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Allan Sindelar
Sent: Friday, June 28, 2013 2:10 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] double insulated wire

On 6/28/2013 11:47 AM, aram at aramsolar.com<mailto:aram at aramsolar.com> wrote:

And of course Red for positive and black for negative.
Most building departments have not pick up on this yet. But they will.
Aram

Where does "of course Red for positive and black for negative" come from, please? I only know it as an automotive standard that has often caused confusion when used by DIY offgridders in years past, as black thus could represent either positive or negative in a DC conductor pair.
Is there yet a convention for ungrounded arrays? While red and black are technically correct as ungrounded current-carrying conductors, use of this color convention could cause as much confusion as resolve it in the future. How about "black and black" or for that matter "yellow and orange" (if supplied by manufacturers) for ungrounded arrays?
Thanks, Allan
Allan Sindelar
Allan at positiveenergysolar.com<mailto:Allan at positiveenergysolar.com>
NABCEP Certified PV Installation Professional
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Positive Energy, Inc., a Certified B CorporationTM
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505 424-1112 office 780-2738 cell
www.positiveenergysolar.com<http://www.positiveenergysolar.com/>

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