Bronze Grounding Clamp for Bare Wire and PipeDescription Bronze Grounding Clamp for Bare Wire and Pipe These clamps may be used on pipe and are made to accommodate bare cable. Primus Cables' unique labor saving design allows the upper portion of clamps to slide open easily and, attach to structural pipes and rebar without needing to remove the screws. The rotational movement of the clamps allows a quick removal if necessary. Their cast bronze construction assures ground path continuity and