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355 Posts
Discussion Starter #1
I don't understand what exactly a relay does.

Why do I need a relay on a manually controlled electric fan? Should I get a 75 amp relay? With the relay, do I need a fuse of any kind also in the wire, or not?

Where exactly should I put it in the wire?

Please help if you can because I'd like to do this today.

Thanks, Brad.
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