Originally Posted by asdf38
Fair. But I'm still not sure which one he was asking about. I consider it safe to assume that when someone says ground, especially in a DC system they mean return, or in this case battery (-). I also suspect this text was trying to lay out what ground is in a general sense which blurs the lines between earth, return, (-) etc.
I (and I think, Botherton) was referring to the battery-motor Neg connection. He begins the paragraph with: "GROUND refers to a connection made to the earth itself"....(paraphrasing)"On land, through a pipe driven into the ground, on our boats, ultimately to Seawater". He goes on to say that ideally (and by ABYC recommendation): "Each item in the circuit is connected by its own pair of wires and the common ground carries no load current." (except on my boat on which I now realize, it completes the circuit for the Alt. and Starter!
Anyway, I was specifically asking how GROUND "will supply all (charge) we need". (My boat notwithstanding!)