I need to connect several copper-clad ground rods together with AWG 6 solid copper wire for lightning protection, and as part of the electrical service grounding. I also need to connect some 2.5" copper strap to this system.
Is brazing with an oxy-MAPP gas torch and bronze-copper brazing alloy allowed for these connections? Or perhaps a high silver alloy like Harris Stay-Silv 15? Seems more accessible than exothermic welding, and more durable and effective than mechanical clamps (especially for underground connections). But I've read contradictory information -- can someone clarify with a direct citation of the NEC or similar standard?