The NEC is even more restrictive with equipment grounding conductors, actually. You are not allowed to use solder-only connections on grounds. I don't want to

The NEC is even more restrictive with equipment grounding conductors, actually. You are not allowed to use solder-only connections on grounds. I don't want to go farther down the road, since we're only talking to each other, but here is a link FYI: http://www.ecmag.com/?articleID=8721&fa=article http://www.ecmag.com/?articleID=8721&fa=article The relevant part is: "Connection of Grounding and Bonding Equipment. Grounding conductors and bonding jumpers shall be connected by exothermic welding, listed pressure connectors, listed clamps, or other listed means. Connection devices or fittings that depend solely on solder shall not be used." You really cannot just twist-and-solder for a ground. It is specifically forbidden by the NEC.