[RE-wrenches] Combining conductors

Nathan Stumpff Nathan at arcticsun-llc.com
Thu Apr 4 10:20:05 PDT 2013


Larry,

I don't think the relationship of AWG size to ampacity is a linear curve, so while that "rule of thumb" may be pretty good, you can't always count on it. I would use the circular area column in NEC Chapter 9, Table 8 for an easy, quick way to compare two of one conductor vs. one of another.

Of course there are other code issues regarding parallel conductors...

Cheers,
-Nathan

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Nathan J. Stumpff
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From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Larry Crutcher, Starlight Solar Power Systems
Sent: Thursday, April 04, 2013 8:51 AM
To: RE-wrenches
Subject: [RE-wrenches] Combining conductors

Wrenches,

Here's a tough one for me to understand. I am installing 2 volt AGM batteries. There are two terminals for each battery polarity. I have some height limits so I need to use the minimum wire size. Here's my question: If I combine two identical conductors, what is the equivalent single conductor size?

I found one "rule of thumb" that says doubling like conductors creates a AWG decrease of 3. Example: two #2 will be equivalent to 2/0. Is this true?

Thank you,

Larry Crutcher
Starlight Solar Power Systems






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