According to Army Technical Manual 5-690 a stainless steel hose clamp makes for an excellent grounding and bonding connector when nothing else is available or where a conventional grounding connector would crush or perforate a waveguide, coaxial cable, or just about any kind of tubing.
An instance where this would be useful would be when bonding a thinwall chrome plated sink trap and the water shutoff valves to each other and the local branch circuit to get rid of a tingle voltage. David Eli Shapiro one time encountered an instance where electricity was crawling up the moisture inside of a plastic drain pipe creating a nasty tingle voltage in a shower. How this can happen is that I have done some consulting for a mobile home park that has grass and tree roots that are penetrating the o-ring joints of gasketed PVC sewer pipe. Sooner or later sanitary engineers will have to specify that o-ring joints be wrapped with copper foil or some other deterrent to plant roots.
Now I am realizing that electricians be trained to do plumbing in general not only to be good at running pipe in general and conduit in particular but also to understand what somebody else's problems and issues are. In return, we also need to be training plumbers how to use pipe benders which would solve some of their problems. Michael R. Cole
|