Does the ground wire for an electronic component need to be the same size as the power wire? Or can it be smaller and still be adequate? For example if I was adding an in-line fuel pump, can you use a 10-12 gauge power wire and then a 14-16 gauge ground wire or does it need to be the same size as the power wire to keep it from overloading?

 

It's a DC series circuit and the ground will carry the same current as the positive. It needs to be the same size.

 

Perfect! I was assuming it carried the same load but wanted to make sure.
Thanks!