Sprinkler codes have precedence, and are just about the only thing that can infringe upon 'working space.'
Mike ... the clamp used is intended to be used to attach a Ground wire (GEC) to the ground rod. It is NOT intended to be used to splice wires together. Our code would call for either cad-weld or a crimp connection here.
Last edited by frenchelectrican; 02/12/0908:39 PM. Reason: fix John's spelling on one letter