thanks Walt; Mark;
the 43.13 is a big circular, I'll need time to study and well comply , the chapter 11 section 2 mentioned, is about "Storage Batteries"

But I found in the section 5 a source for cable current capacity, in fig 11-9 the 8 awg carry 38 A @ 105 ?C , far from 60A .... or I'm wrong?
thanks Mich;
I read the AeroElectric discussion about ANL-Midi , now I start to think about a conventional Bussmann ANL

but I'm not sure about do not protect the cable that feed the main bus
may be I'll need more learning on the text .
thanks a lot at all other guys not mentioned