You shouldn't parallel wiring that way. That is not acceptable by code, and it
is unnecessary. If the #10 is not sufficient just replace it. Due to the
fact
that the larger wiring has much less resistance, most if not all of the current
will flow on the larger wires.
Nick Soleil
Project Manager
Advanced Alternative Energy Solutions, LLC
PO Box 657
Petaluma, CA 94953
Cell: 707-321-2937
Office: 707-789-9537
Fax: 707-769-9037
________________________________
From: "Starlight Solar, Larry Crutcher" <la...@starlightsolar.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Sent: Wed, February 2, 2011 8:00:07 AM
Subject: [RE-wrenches] Parallel wire runs to increase size
Wrenches,
Some of our business involves repairing poor PV solar installations on
recreational vehicles. So often we wind up installing a roof junction box and
running a second PV to controller wire and then replacing the controller to
battery wire size. For instance, we may find a 10 gauge wire run to the
controller. We then add #8, #6, #4 or even 2 gauge and parallel to the #10
depending on power and distance of the run. My question: Is there a calculator
or chart that will tell me what the combination of any two wire sizes equate
to? example: #10 + #4 = X
Thanks.
Larry Crutcher
Starlight Solar Power Systems
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