Bonding cold and hot at the water heater

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Mesh

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I know this subject has some controversy. But I know that the local inspectors want it done so it's easier to just comply. My only question is what size jumper is required?

For a typical 200A service I think a #6 should suffice, but I wonder if a #4 is required like the water pipe GEC.

Which is it?
 
I think technically it needs to be sized per 250.66 just like the main water bond. However, I put a #6 between hot, cold, and the copper drains and the inspector liked that (I had a 1/0 to the main water pipe because it was a 400A service). The pipe clamps that could take a 1/0 were rather hard to find and I didn't want to buy 3 more, especially one for a 2" copper pipe.

I wish the code allowed interior water pipes to use 250.122 like every other type of pipe type that could be energized.
 
SO I'll just use some #2 Al and purchase another pair of those expensive dual rated pipe clamps :D
 
Bonding jumpers are sized per table 250.66, according to the largest ungrounded conductor. You would also use this table when grounding for a 200 amp service and sizing GEC for water meter, water heater, water softener, and ufer ground. The #6 solid bare is the max size you need to use for a 200 amp service ground rod electrode.
 
Ohms law said:
Bonding jumpers are sized per table 250.66, according to the largest ungrounded conductor. You would also use this table when grounding for a 200 amp service and sizing GEC for water meter, water heater, water softener, and ufer ground. The #6 solid bare is the max size you need to use for a 200 amp service ground rod electrode.
Click to expand...

Also a CEE (Ufer) GEC or bonding jumper is not required to be larger than #4 even if the corresponding conductor size in T250.66 is larger than #4.
 
Ohms law said:
The #6 solid bare is the max size you need to use for a 200 amp service ground rod electrode.
Click to expand...
Actually a #6 copper conductor (it doesn't have to be bare) is the maximum size required to a rod type electrode for any size service.

BTW welcome to the forum.

Roger
 
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