Bonding cold and hot at the water heater

[Mesh]

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?

 

[suemarkp]

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.

 

[Dennis Alwon]

For 200 amp use a #4-- based on service conductor size and 250.66-- usually a #4

 

[infinity]

For 200 amp use a #4-- based on service conductor size and 250.66-- usually a #4

I agree and in New Jersey you will be installing them if you don't want a red sticker. (Sorry Mike).

 

[Mesh]

SO I'll just use some #2 Al and purchase another pair of those expensive dual rated pipe clamps

 

[Rewire]

Most new homes are using pex and plastic so no water ground available or bonding needed.

 

[Mesh]

Most new homes are using pex and plastic so no water ground available or bonding needed.

Clearly, the situation that I am talking about is when there are metal pipes...

 

[Ohms law]

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.

 

[infinity]

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.

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.

 

[roger]

The #6 solid bare is the max size you need to use for a 200 amp service ground rod electrode.

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

 

[infinity]

Yes, welcome to the forum.

I'm surprised that the name Ohms law wasn't taken.

 

[jumper]

Is this extra WH bond actually written into NJ code? I looked at the NJ UCC, electrical sub-code amendments and did not find it.

 

[Mesh]

Is this extra WH bond actually written into NJ code? I looked at the NJ UCC, electrical sub-code amendments and did not find it.

No, it's written into the NEC.

 

[al hildenbrand]

No, it's written into the NEC.

Oh. Where?

 

[roger]

Oh. Where?

I second that "where"

Roger

 

[Mesh]

You all know where. :thumbsup:

 

[jumper]

You all know where. :thumbsup:

Do not understand. Reference, code section, explanation? Is this an unwritten rule?

 

[al hildenbrand]

You all know where. :thumbsup:

Respectfully, I don't think it can be found.

 

[jumper]

Oh. Where?

I second that "where"

Roger

Okay, it not just me.

 

[al hildenbrand]

I agree and in New Jersey you will be installing them if you don't want a red sticker.

Out of curiosity, Rob, what do you cite for your red sticker?