But, after mounting the Littelfuse 175A (yes, I know MRBF is better) at the battery terminal, significant heating occurred in 5 minutes or so, right at the fuse location and slightly on the wiring.
I was very careful with fuse mounting, solid copper (polished, 3/16" x 1" flatbar), clamped very tightly, but there is apparently significant resistance there.
I understand that single 2AWG should be good up to 180A continuous current. Given that the heating occurs right at/around the fuse, would the heating be reduced/eliminated by upping the wire size, or is there something else I am missing regarding the fuse assembly? As indicated, all stayed cool without the fuse. If wire upsizing is the only solution okay, but would hate all that work and (some) expense if it is not really the problem. Thanks.