are all power/ground wires one and the same?

YzGyz

Wires and electric is complicated in a way. All you really have to know is:

-correct guage (This is important because it tells you if the wire is rated for x amount of amps. The wire wont heat up and burn.)

-how much copper (The amount of copper is important because it conduct well.)

-how many stands of wires make up the cable (Electric actually flows along the outside of the wire and not through it in a sense. So if you have 1 big fat wire, the amount of electric that can flow around the outside will be less that one cable made of 2 wires. Simply think surface area.)

-how well is it insulate. (once again, for safety as the wire may get hot.)