Wicks

Electrical current must flow in a path, to and from the battery/alternator. Therefore it will always be choked down by your smallest wire gauge regardless where it is. The official (wikipedia) copper resistance of 4ga is 0.25mOhms/ft. You said the fuse rating is 160a. So at potentential max current draw you could get a 0.8V drop across your 20feet of 4ga wire. 0.25m * 20' = 5mOhms. 160a * 5mOhms = 0.8V drop. 160a*160a*5mOhms = 128W of power loss in the wire. Given, 4ga wire is only rated for maybe 100a so it might be slightly stressed by that 160a. 0ga will only be better. In general, always use the larger wire for long cable runs. Less resistance, less voltage drop.

What do you want the voltmeter to measure? If you want to see alternator voltage, wire it to the front of your car (alternator or front battery). If you want to see amplifier voltage, wire it to the amps (this will show you any voltage drop that occurs from the cable routing). Trunk lights could also be hooked up to the remote turn on wire (with a relay). Or have a pin-switch conected to a relay that turns the lights on when the trunk is opened..?

Thanks It's amazing what kind of legislation goes through the system without people being better informed. There are soo many more important issues out there than if a multi-platinum music artist gets mad because somebody sampled their song in a youtube video. If anything its free advertisment because people will hear the song and want to legally download it so they can play it.

http://www.opencongress.org/bill/112-s978/show Check it out. A lot of you post youtube videos showing your systems while using copyrighted songs (what else would we use?). If this bill goes through, those that make money on those videos could get felonies. This could be a major issue in the future for somebody Spread the