I'm going to make a wiring harness for some LED driving lights I bought. I have the individual leads from each light and I want to join them to one main wire to run through a dimmer unit and a relay for a switch etc. my question is , is there a rule for what gauge the main wire should be? Sorry, I'm a complete dumbass with this kind of stuff. I know that the main wire will carry twice the load of the individual lights so it should be thicker, but I don't want to over do things either. The length of this main lead will probably be less than 3 ft too and it will eventually end at an ignition switched fuse box on the bike.
cheers.
cheers.