I need an electrician's advice...
 

Hey Guys,

If I want to run a 'trunk' or main line with a capacity of 30 Amps through 16 ft. of wire at 12 volts, what gauge wire should I use?

Thanks! fish

Go With #10 and if you can find it get MTW (Machine tool wire) its very flexible and can with stand heat and cold better than regular wire + dont forget a fuse.

Jr and Jimb,

Thanks a lot for the quick responses! and Jimb--I've been looking all morning through my bookmarks for this site!

There is an excellent technical article with the exact information you need.
Check it out:
https://www.f150online.com/tech/electrical1.html