Remove old grounding wire?? Help!!


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Old 06-15-18, 05:38 AM
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Question Remove old grounding wire?? Help!!

Our house, built in '68 w/ all copper plumbing, has/had a grounding wire leading from outside the home to our basement inside and is affixed to [cold] copper water pipe [to water heater]. I know this was common practice when our home was built. However, on the outside of the house, the wire is only about 2 feet in length, not attached to anything (a rod, etc.) and had just a couple inches of the end stuck in the ground.

To my novice self, this doesn't seem to be a proper grounding wire any longer. I'm wondering if it's from an old telephone box or something else that was removed long ago & the water pipe was used to ground it?

Would love an opinion from any pros out there whether this can be removed. (I may/may not have plundered a piece of the wire to fix a refrigerator and need to know if I need to re-attach it to the water pipe! Hindsight is always 50/50, right?)

Thanks a bunch for any & all advice!
 
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Old 06-15-18, 02:20 PM
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A grounding wire to a ground rod or a water pipe has nothing to do with the third prong on a receptacle which is what I think you are concerned about .

A receptacle should be grounded back to the panel it originates from. Is there a ground in the cable?
 
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Old 06-15-18, 05:18 PM
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Until Winstead returns (IF he/she returns) I will assume that he/she is another Facebook one-post wonder. However, unlike PC I suspect the question has to do with the Grounding Electrode Conductor (GEC) and NOT an equipment grounding conductor.

Winstead, if you DO return please post a few pictures of this "wire" and where it was connected inside the house as well as where it is outside.
 
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Old 06-18-18, 05:07 AM
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Hey...definitely not a one-time wonder. ...thanks!

Thanks so much for your responses, Furd & PCBoss I think?! But first, Furd, I don't use FB a lot & I (think) I'm really happy to have found your forum because my husband does year long tours of duty in war zones and I'm left to fend for myself with home repairs!

There's no receptacle of any kind involved here, no third prong. It's just one silly wire by itself. I posted pics of the wire, outside the house, coming into the house & from the inside. (Apologies that the upload rotated the pics sideways!) In the pic, it is the smaller, white wire in the center. Just a few inches go down into the gound.

I looked and our copper piping is not grounded (as it should be) within 15 ft of where it enters the house, so I wonder if that's the purpose of this wire...to ground our copper water pipes?? From the 3rd pic, it just goes straight to a clamp on the cold water pipe about 5 ft from the pipe entrance into the water heater.

Thanks again for any insight.

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Last edited by PJmax; 06-18-18 at 05:35 PM. Reason: cropped/reoriented pictures
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Old 06-18-18, 06:26 AM
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The grounding electrode conductor to the fresh water plumbing is attached within five feet of where the cold water supply pipe exits the house underground, without any devices such as a pressure regulator in between. If the cold water supply pipe is known to not be metal for ten or more feet beyond the house then a fat copper wire attached there does not count as a GEC. A different (say, outgoing to a shed) metal water pipe can be the grounding electrode, or none if no exiting water pipes qualify.

Plumbing is not "grounded" directly to ground rods.

A bonding jumper (same #4, sometimes #6, copper) may be run from anywhere on metal plumbing to the breaker panel and attached to the ground bus bar there. If it fist reaches a GEC it may end and be clamped on there. A bonding jumper should join any section of metal plumbing orphaned by a section of plastic plumbing in between to metal plumbing that is bonded to the electrical system. This is sized for the equipment grounding conductor of the largest branch circuit running near that orphaned section of plumbing.

I conclude that the bare wire end currently stuck like an ostrich head in the sand currently cannot serve any official purpose outside. (It could serve as a ground for a child's (or hobbyist's) crystal radio.) Now you could pull it all inside and connect the loose end to the hot pipe out of the water heater. This provides the recommended bonding of the hot water plumbing to the rest of the plumbing.

I am unable to make tails or heads out of the pictures shown except I see what looks like a plastic water pipe exiting the house underground.

Possible off topic suggestion for those eavesdropping: Do not take vertical (portrait orientation) photographs of material intended to be posted on line or presented using video projectors.

I would not insinuate that somebody might be a Facebook one post wonder after his absence for less than a day.
 

Last edited by AllanJ; 06-18-18 at 06:51 AM.
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Old 06-18-18, 10:23 AM
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That size/type wire was often used for telephone bonding/grounding. The telephone block was attached to the closest water pipe via a 12ga solid wire. That's what it looks like to me.

There should be a heavier gauge wire (#8, #6) from your electrical panel to cold water pipe. In the 60's it was usually attached to the closest water pipe. Nowadays, it needs to be within 5' of where it enters the house. Now you also need 2 ground rods along with a jumper between the hot/cold water pipes at the water heater.

You don't necessarily need to upgrade the grounding/bonding in your house, but it could be a worthwhile project.
 
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Old 06-18-18, 05:36 PM
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That piece of wire was from a utility ground connection. It can now be removed as it's no longer needed.
 
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Old 06-25-18, 05:27 AM
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Smile Thanks so much!!

Thank you, thank you Allen, Pete and Zorfdt so much for taking the time to respond! A great learning process for me. I initially thought it's from the old telephone, but regardless, it's now going to be history. (I found the heavy wire/grounding for our box coming off directly by the hot water heater & followed it outside to grounding rods in the earth .) Have a great 4th of July!
 
 

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