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How do I wire my pumps & switches?


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when you run B your still limiting your current because you are only running one ground wire.

I think you should wire it like your A diagram, just use 12g wire from the battery to the switches

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I can't speak to the wiring because I'd have to go look at how I have mine wired, but you should IMO consider using relays. The upper limit of those switches is very close to what the Simers will spike to upon startup. I've had a situation in the past on another boat where we didn't use a relay & the switch would get hot to the touch when the Simer was running. JMO of course.

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The switches are rated at 20A. I have 20A fuses on the + leads. Do I need relays? So 2 ground & 2 positive 2 each switch? Like this?


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