| luis |
Fri May 20, 2022 1:06 pm |
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I am going to put an Empi 90 AmP alternator (don’t hate it) in my bug - it’s hard to find an alternative at this time with supply chain issues. Also some reviews say good things about this alternator.
The question is what gauge wire should I run from the alternator to the battery? The original wire seems to be 8 gauge and I replaced the old loom with a new one. I am running big stereo and lots of accessories so I am sure that will answer those who reply with why I would want a 90 amp alternator.
Is 4 gauge too big and should it be fused before going to the battery? Others have also said that with a bigger amp to ground the alternator directly to the chassis. Any thoughts appreciated. [/i] |
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| mukluk |
Fri May 20, 2022 1:49 pm |
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Standard automotive 8 gauge wire will handle your 13.8v/90amp load if the wire run is no longer than seven feet. If your wire run is between 7-10 feet then 6 gauge is needed, 4 gauge is only required for runs over 10 feet. The stock battery negative and transmission bonding straps should be sufficient provided they're in good shape with clean connections.
http://www.offroaders.com/technical/12-volt-wiring-tech-gauge-to-amps/ |
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| runamoc |
Fri May 20, 2022 2:38 pm |
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maybe this link will help you calculate what gauge wire is needed. When I run hi-amp loads like 60amps I'll run 2 #10 wires in parallel. They carry more current than 1 #6. Also, 3 #10 will carry more than 90amps. Be sure to read the fine print at the bottom of the chart
https://mgispeedware.com/wire-size-chart/ |
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