Yeah, if there is no ground present (ie a 2 wire cable in a plastic or ungrounded metal box), they just won’t trip as the ground prong is effectively isolated.
While not the best idea, you can usually derive a quick ground from a plumbing pipe, assuming copper or galvy pipes (pex obviously won’t work), or a metal gas pipe. I’ve done it in a pinch when a proper system ground wasn’t feasible, but only as a temporary measure.
Yeah, if there is no ground present (ie a 2 wire cable in a plastic or ungrounded metal box), they just won’t trip as the ground prong is effectively isolated.
While not the best idea, you can usually derive a quick ground from a plumbing pipe, assuming copper or galvy pipes (pex obviously won’t work), or a metal gas pipe. I’ve done it in a pinch when a proper system ground wasn’t feasible, but only as a temporary measure.