We (neither Richard nor myself) can, however, I am sure that my presumption of what was being done has a much higher probability of being correct than the assumption Richard made.

I base this on two things: 1) because that is being supplied some type of non-metallic pipe (which, by the way, does not look to be an approved pipe for inside a structure, nor does the clamping look like an approved connection); 2) the fact that Richards posts seem to have one thing in common - screw the code, do it anyway you want, and if something is done, it just has to be done by a stupid person (not that that would matter based on the attitude of screw the code, seems that would indicated that no bonding or grounding was necessary, and the person doing that was just wasting wire).


This is the difference between grounding and bonding.

With grounding, you are intentionally taking something to earth, i.e., "ground"ing it to earth ground.

With bonding, you have no concern where "earth" or "ground" is, you simply want to tie it all together at the same equipotential plane. That means that, in the case of bonding metal piping to ground, touching the metal piping anywhere along the metal piping will essentially be similar to touching earth.

Bonding gets confusing because you have "bonding to ground" (such as interior metal piping systems) and "bonding to create an equipotential plane" (such as at swimming pools and spas).

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Jerry Peck, Construction / Litigation Consultant
Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
www.AskCodeMan.com