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Old 03-21-2010, 10:01 PM
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what gauge wire?

I need to replace the alternator in my '69 Camaro (350 sb) & when I pulled the old one out, the ring connector on the wire that screws to the back of the alternator got damaged. The wire is too short now for me to just crimp a new connector on so I need to add a little bit of wire first. It looks like the wire coming out of the harness is about a 10 gauge, but the thickest I could find at the store is 12. Will that be heavy enough for this connection or do I need to track down some 10 gauge? The 2 little wires in the plug-in connector are still intact so this big one is the only one I'm repairing...am I safe with 12 gauge?

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Old 03-21-2010, 10:26 PM
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I would consider 12 gauge wire good for 20 amps. I am sure your alternator can put out more than that.
I would also crimp, and then solder the connection. If the wire is fairly easy to get to, I would replace the entire wire from the alternator to the junction block, if possible with a heavier gauge wire, with a minimum amount of connections.
Time to start looking for another parts store if the ones you have used so far only have 12 gauge primary wire.
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Old 03-22-2010, 05:59 AM
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My stock 10si was a 63 amp, and it used a 10 gauge charge wire.

10 gauge wire should be easy to find at a parts store or even at Wal-Mart. However, most of the bubble pack wiring will have a PVC outer coating that is not as durable as the stock GM wire. For engine compartment use, what you really want to find is wiring with TXL rated insulation.

This is a good reference site.
http://www.kayjayco.com/catPWireSelect.htm

Bruce
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Old 03-22-2010, 06:47 AM
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FWIW, w/DC, you want as may strands in a particular gage wire as you can find. For a 10g wire, for instance, you'd like 400-plus strands.

In any event, more is better than less.
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Old 03-22-2010, 07:51 AM
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I agree with Cobalt, but you will not find that fine strand #10 wire at any auto parts stores locally. Whatever wire you do find don't go smaller than #10.

Vince
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Old 03-22-2010, 12:37 PM
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Thanks guys, last night I tried Walmart because its all that was still open & 12 was the biggest they had. I'm assuming the auto parts stores will have some sort of 10 gauge, I'll look for the highest strands & best insullation I can find. If they have nothing strong enough, I'll dig up one of my old car stereo installs that's probably sitting in my basement still & use the 8 gauge that ran to the amp. I'd rather do overkill than melt a wire & burn the car up.
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Old 03-22-2010, 01:38 PM
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The stereo 8 gauge wire will work very well, solder the connections after crimping as Danielc said before.
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