Switched Power

[crystalworks]

Originally Posted by Purplefade

I think CW is talking about using the remote turn on or amp turn on wire coming from your radio. It is a very low voltage output that would just trigger the relay. Having the 12v “through” source wire coming off the cigarette lighter would provide “conditioned” power from the car and the coil in the relay would act like an insulator against back feed me noise.

He’ll correct me if I’m wrong

Correct. The relay draws a small current, compared to powering other devices. 160mA for a typical 12v 30A relay.

Originally Posted by Overboost

Why not just go to the fusebox. It's right there.

Stop being all logical like that OB. Could also grab the 12v feed to the fuse box to be accessory power on the relay instead of the cigarette lighter. Just suggested the lighter is just convenient because it uses larger gauge wire and could handle additional load.

Originally Posted by andrewwynn

If pulling high power put in a little effort to find the matched ground vs. using a random ground. Classic mistake in house wiring is when people overload a neutral by tapping into a random neutral.

Yes. For sure. Match your power wire size to your ground wire size.