I need some advice. I'm relatively green when it comes to electrical work so please excuse my ignorance.
I've been searching the forums for the last couple days about wiring a fuse box for adding extra electronics to my truck. I've found plenty of posts about people wiring it directly to the battery for a circuit that's always on, but nothing about wiring it to switched power - I wanted to wire mine so it only worked when the ignition was turned on. I've seen some people go through one of the switched accessories on the existing fuse box but I wanted to avoid that. I figured there had to be a better way, connecting the new fuse box to the battery and using a relay to switch it on/off with the ignition. I did some searching last night and found this diagram.
In this diagram you can see there's 40a relays. I was thinking I wanted to use 80a (with the appropriate gauge wiring) instead as I didn't think 40a was enough for all the stuff I eventually wanted to install (CB, lights, winch etc). Has anyone wired a fuse box in this manner? Is 80a too much? Am I looking at this all wrong?
Any advice is greatly appreciated.