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24v vs 12v -- amps is amps?

Jones

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I've read lots of posts on light switch failures (especially the push-button one) and the pros and cons of adding a relay inline as a way to cut back on the current across the light switch contacts.
I'm still debating the 24v or 12v question and can wire up the baby HEMTT either way. So here's my question; Would I be any easier on the circuitry if I ran 12v lights instead of the 24v ones? One side says yes and the other side says amps is amps regardless of whether it's a 12 or 24 volt system.
 

cranetruck

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Leonard, you will double the amperage if you cut the voltage in half for the the same wattage. If you run a 12 volt system you should run heavier gauge wiring throughout.
 

cranetruck

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Depends on the load, 14G is okay for lights. For more than 10 amp loads use heavier wire. There are tables for this, but your biggest concern should be the starter motor wiring.

Keep in mind that if you use the 3-lever light switch, it houses a built-in 20 amp CB, which may limit your options. Of course, if you use relays for head lights and turn signals (I do), you should be fine.
 
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