Color of wire between batteries in series? - SailNet Community
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post #1 of 17 Old 07-01-2013 Thread Starter
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Color of wire between batteries in series?

I'm replacing my single 12v group 24 battery with two 6v GC2s in series. This is clearly a little silly, but what color wire should connect the positive of the low battery with the negative of the high battery?

The main interest is in minimizing confusion, so someone doesn't someone mix up the terminals somehow in the future, or something.

I tried googling, and there's not a lot of hits, but there were a couple of google images showing people using a red wire. I guess this makes sense, from the perspective that red means non-zero ideal potential.
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post #2 of 17 Old 07-01-2013
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Re: Color of wire between batteries in series?

Since you're only using two batteries, thus only one wire between them, with the red lead (Pos) and black lead (Neg) clearly attached to their proper terminals, the wire between batteries should not cause any confusion.

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post #3 of 17 Old 07-01-2013
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Re: Color of wire between batteries in series?

In serial config, there will need to be a wire run from one battery's neg to the others pos. I think this is the OPs question.

Answer... it doesn't really matter, but I prefer red. Therefore, you can write in a sharpie right on the cable to identify where it belongs in the future. First write an A on one battery and B on the other. Then, for example, write A- on one end of the red connector cable and B+ on the other, or whatever you need.


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post #4 of 17 Old 07-01-2013
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Re: Color of wire between batteries in series?

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Originally Posted by aaronwindward View Post
I'm replacing my single 12v group 24 battery with two 6v GC2s in series. This is clearly a little silly, but what color wire should connect the positive of the low battery with the negative of the high battery?

The main interest is in minimizing confusion, so someone doesn't someone mix up the terminals somehow in the future, or something.

I tried googling, and there's not a lot of hits, but there were a couple of google images showing people using a red wire. I guess this makes sense, from the perspective that red means non-zero ideal potential.
I agree, red indicates a live wire, and yours is live - at 6V. Red also indicates danger in that anything at ground that touches it will short out the battery. So two votes for red.
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post #5 of 17 Old 07-04-2013
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Re: Color of wire between batteries in series?

I like to use red wire and then put a few wraps of black electrical tape on the end that connects to the Neg. terminal just for quick visual reference.
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post #6 of 17 Old 07-05-2013 Thread Starter
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Re: Color of wire between batteries in series?

I ended up using red, but I think adding electrical tape like Neosec says is a pretty good idea.
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post #7 of 17 Old 07-05-2013
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post #8 of 17 Old 07-20-2013 Thread Starter
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Re: Color of wire between batteries in series?

Maine your installations here and on that other thread are beautiful. Mine isn't anywhere near that awesome, although it's given me some good examples to work toward.

I ended up going with the red, the clear winner; the next time I work on the wiring, I'm going to copy your trick to use colored tape to mark it specially so it's obvious what it is.
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post #9 of 17 Old 07-20-2013
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Re: Color of wire between batteries in series?

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Originally Posted by aaronwindward View Post
Maine your installations here and on that other thread are beautiful. Mine isn't anywhere near that awesome, although it's given me some good examples to work toward.

I ended up going with the red, the clear winner; the next time I work on the wiring, I'm going to copy your trick to use colored tape to mark it specially so it's obvious what it is.
It's not tape - it's shrink. The wire insulation color isn't that important, but I definitely agree on using properly colored heat shrink. It helps keep things straight. Similarly, once you pick an insulation color you should be consistent.

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post #10 of 17 Old 07-22-2013
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Re: Color of wire between batteries in series?

Last one I did we used yellow cable. Red adhesive heat shrink on positive, black on negative. Made it easy to figure out looking at it.
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