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Easy Switched Power Source

36K views 18 replies 10 participants last post by  Uncle Sams Misguided Child  
Hey James,

The answer is NO.......... One Switch per Circuit . That means a separate relay. So find another tap somewhere in the fuse box or wire up a relay circuit .

EDIT: and stop trying to use 30 amps on a circuit only supplying 10 to 15 you fister.......
He could absolutely run both switches off one fuse tap. It's done everyday and there is no reason not to. Why run two fuses/wires when all you need is one. The relays the switches will control will pull about 150mA each, the switches will not draw any current unless they have a light on them and in that case most of those are LEDs and draw negligible current. In the case it's an incandescent bulb you're talking MAYBE a 2w bulb which would be about 160mA current draw. So even if he has two lighted switches powering 2 30A relays the current draw is less than 1A even with the built in resistance of the wire and all the connectors. That is well under the 10A the fuse holder is rated for.