Ok did a bit of research re op grating wire on som older F trucks, not really clued on electric, when said to op grade earth what exactly should be done, heavier cable from batteries to frame ? Or batteries to alternator? Or both. What size cable, I read that people use one size smaller than positive? Why. If running 2/0 to winch I am also considering running a extra 2/0 cable between batteries positives, god idea or not, and also do I want to include fuses on cable, if so what size considering the load could be op to 430A and I think cable rating about 500A?
Thanks Frank.