As for the tubing, I dunno. I'd just find a size that works. Why are you using Monster cable?
Sorry, I meant the cable itself is very large...4700+ strand 1/0 gauge lead. It's totaly overkill, but I'm redoing the charging system in my Mustang, and I need a new positive lead, so I'm making my own out of some nice stereo grade stuff for a few more bucks. I'm putting in an upgraded 3G 120A alternator, redoing the main lead for the alternator with some 1800+ strand 4Ga wire, 150A ANL fuse, and a platnium coated fuse holder.
I was just curious what size HS tubing I will need as this 1/0 cable is HUGE.
Oh, and I do have a digital multi-meter, but wouldn't I have to pierce the wires to tell?