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Old 05-07-2009, 11:16 PM   #1
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Ground distance from water entry


Hi guys
Does anybody know what the safe distance a ground wire can be from the water service entry? The ground is connected to a water pipe some distance from the water entry the meter is jumped

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Old 05-08-2009, 12:43 AM   #2
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Ground distance from water entry


Not really sure what you are asking but there is nothing that says a ground wire has to be so for from a water source. you are accually required to bond your service to the water and gas system.

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Old 05-08-2009, 06:15 AM   #3
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Ground distance from water entry


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Not really sure what you are asking but there is nothing that says a ground wire has to be so for from a water source. you are accually required to bond your service to the water and gas system.
You can use the water system for grounding, but not gas.
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Old 05-08-2009, 07:05 AM   #4
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Ground distance from water entry


Someone told me that the ground should be connected as close to water service entry as possible
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Old 05-08-2009, 07:58 AM   #5
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Ground distance from water entry


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Someone told me that the ground should be connected as close to water service entry as possible
If you have at least 10ft of buried metal water pipe, then that should be your primary grounding electrode. The connection to this electrode should be within 5ft of it entering the house.
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Old 05-08-2009, 08:51 AM   #6
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Ground distance from water entry


Thanks that is what I thought. I do not not know why sometimes they are placed far away to much room for error.
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Old 05-08-2009, 08:54 AM   #7
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Ground distance from water entry


If the water feed to the building is plastic, then the connection to the metal piping becomes a bonding connection. This is not part of the grounding electrode system and can be anywhere along the pipe. Jumpers across non-conductive parts are required.
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Old 05-08-2009, 10:45 AM   #8
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Ground distance from water entry


Water feed is copper
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Old 05-08-2009, 03:36 PM   #9
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Ground distance from water entry


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Water feed is copper
250.52 Grounding Electrodes.
(A) Electrodes Permitted for Grounding.
(1) Metal Underground Water Pipe. A metal under-
ground water pipe in direct contact with the earth for 3.0 m
(10 ft) or more (including any metal well casing effectively
bonded to the pipe) and electrically continuous (or made
electrically continuous by bonding around insulating joints
or insulating pipe) to the points of connection of the
grounding electrode conductor and the bonding conductors.
Interior metal water piping located more than 1.52 m (5 ft)
from the point of entrance to the building shall not be used

as a part of the grounding electrode system or as a conduc-
tor to interconnect electrodes that are part of the grounding
electrode system.

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Old 05-08-2009, 04:06 PM   #10
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Ground distance from water entry


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Jumpers across non-conductive parts are required.
Just wanted to stress that:




as here in Chicago I frequently see DYI projects with improper or missing jumpers, here's one from last week:



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Old 05-08-2009, 05:27 PM   #11
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Ground distance from water entry


It was jumped. I am home inspector in illinois I have seen this more and more and keep on writing it up . I was just curious what the max. feet away the grounding electrode could be. I know it has to be real close These real estate agents get real mad at me to . They always say well it is grounded. They just don't understnd how important it is. I explain why but they are just worried about the deal

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