Bob,
All the temp generators we hook up we use what looks like welding cable but is labeled as portable power cable.
For at least one manufacturer the only difference between their power and welding cable, aside from the listing and marking issues) is that the welding cable insulation that is 50% thicker than their listed power cable. Everything else is the same including the size, stranding, and type of material used for the insulation. We are actually prohibited, by the code rules, from using a superior product in this case.
Don
