Having the water bond within 5' of entering the building Question

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cyado1607

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I understand that in section 250.52 it states that when used as a grounding electrode conductor that the water must be bonded within the first 5' However in the later section of the code book of 250.104 it says that the metal water piping can be bonded so long as it is accessible. Anyone fill me in on normal commercial applications aren't the water and sprinkler and metal just need to be bonded not necessarily using it as an electrode. Or does the water bond always have to be within 5'?
 
The connection to the metal water pipe only has to be within 5 feet of the entrance on the building if you are using the pipe as a grounding electrode.

Remember that if it qualifys as a grounding electrode you must use it as such, see 250.50.

Chris
 
cyado1607 said:
I understand that in section 250.52 it states that when used as a grounding electrode conductor that the water must be bonded within the first 5' However in the later section of the code book of 250.104 it says that the metal water piping can be bonded so long as it is accessible. Anyone fill me in on normal commercial applications aren't the water and sprinkler and metal just need to be bonded not necessarily using it as an electrode. Or does the water bond always have to be within 5'?
Click to expand...

When a metallic water piping system is installed and is fed from an underground plastic piping system then the water pipe is bonded and is not an electrode. In order for the water pipe to be an electrode there must be 10' of metal piping in the ground.
 
cyado,

All of the grounding electrodes that are on the job 'all' bond together to form

the GES ( grounding electrode system ).

Now that the GES is installed, you need to 'bond the metal pipings systems',

such as water,sprinkler,gas, compressed air, etc. This bonding can be done

in many ways, including using the EGC of a circuit serving the item. An example

is using the 120v recpt. for the gas stove, to bond the gas pipe.

1. GES
2. Bonding metal piping systems
 
This bonding can be done

in many ways, including using the EGC of a circuit serving the item.
Click to expand...

You can use the EGC to bond "Other Metal Piping" such as gas piping, but for bonding metal water piping you must use a bonding jumper sized in accordance with Table 250.66.

Chris
 
The bonding connection for a metal water piping system must be accessible. If you have a metal ug water pipe that qualifies as a 250.52(A)(1) electrode it grounded within 5ft of the entrance, if the interior piping is metal then the bonding connection is already done...
 
benaround said:
An example is using the 120v recpt. for the gas stove, to bond the gas pipe.
Click to expand...
Some places may actually want you perminently bond the gas, and not be dependant on the outlet, or cord connected appliance. For a very long time in my area this was done at the water heater, but is now done at the gas meter at the second fitting. And that gets "bonded to the service equipment enclosure, the grounded conductor at the service, the grounding electrode conductor where of sufficient size, or to the one or more grounding electrodes used." Hard to do that though a sub-panel feeding the stove or on a multi-unit building.

Not calling you wrong, but there are other interpetaions of that code.
 
benaround said:
Chris,

Thanks for the correction, I should of excluded the ' water pipe '.
Click to expand...

You are very welcome. I knew what you ment but just wanted to clarify the requirement because the OPer was talking abut a water pipe.

Chris
 
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