So lets use commonsense
This has been addressed already a number of times, if you insist on a 'bonding spec' on the metal bodied shower valve you will need to insist on that same spec for every coupling, tee, elbow in the entire system.
I am well aware of what we are talking about.
So if the plumbing rough is not done just how are your checking the bonding at all? :roll:
Thats the entire key right there, if the systems are isolated I would have to join them, but if the systems are not isolated I do not have to 'un-isolate' them again.
Bob
Now we are getting closer.
Isolated is where we disagree.
Click on the link on the bottom so that my quotes to not seem out of context.
Mark C. Ode ODE is staff engineering associate at Underwriters Laboratories Inc., in Research Triangle Park, N.C.
Here are a couple of his statements:
This is from the first line.
"A simple change in construction and plumbing methods over a period of years may have resulted in many water-piping systems being inadequately bonded to the electrical system."
"The cold and hot copper water lines were isolated from each other at the water heater by dielectric unions (an insulating bushing built into the union) and then connected from the dielectric union into the tank using galvanized or black-steel nipples. The dielectric unions provided isolation from the water heater?s metal tank and the steel nipples to the copper water pipe connections at the water heater. This isolation was designed to prevent deterioration of the noncopper metal from cathodic reaction to the copper piping system."
From:
http://www.homebuyeradvocates.com/PDF/water_pipe_bonding.pdf
Let us say we go to court. Even if the commentary is NOT part of the code. What do you think the judge or 'joe blow' would say if they read it? And we all use, or should use, the handbook.
If asked why do you use the handbook what would be your response? Because you want another or expert opinion.