Best to have wire with heavier insulation and stranded wire is always better then solid becaude it's more flexible. The surface area between a stranded or solid is close as current travels on the outside of the wire .
4 awg handles 70 amps
6 awg handles 55 amps
8 awg handles 40 amps
10 awg handles 30 amps
12 awg handles 20 amps
14 awg handles 15 amps
As the other member stated. 12 gauge is great choice if the max current for this circuit is 15 amp. 12 gauge gives you some wiggle room and if your circuit fuse is 15 amp just dont put a 25 or 30 amp fuse in that circuit as you be heating the wire up. Keep the fuses really close the the max current draw.
Sent from my SM-J337V using Tapatalk
__________________
7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread:
https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer:
https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information:
https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html