Well Water Grounding

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mjc

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Currently involved with the install of a new 2500sq.ft. residential building with crawl space, that does not have an underground water supply but will have a well. My question is: What is the grounding method used for this type of situation?

Dont think 250.50 is available (rebar ground rod). 250.56 will be used but it seems to me that this is only a supplment to an approved method. Is there an easy way to accomplish this ?

Looked around the forum search link but cant seem to find anything reguarding my question.
Thanks in advance , Mike
 
If there is no metallic water line and no CEE present then 1 or 2 ground rods are all that's required. The well casing is not on the list of permitted grounding electrodes which means that it doesn't qualify as one.
 
This is driven pipe usually deeper than 8' or if the water table is that close there are most likely in a lake swimming
 
infinity said:
If there is no metallic water line and no CEE present then 1 or 2 ground rods are all that's required. The well casing is not on the list of permitted grounding electrodes which means that it doesn't qualify as one.
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The well casing is on the list of permitted electrodes but it is not on the list of required electrodes. You can use it, you don't have to. If you do use it no rods are needed. I would bet the well casing would be better than two ground rods but if it is 200 yds from the house it would not be economical to utilize it.
Either way as stated it must be bonded to the circuit supplying the well motor.

Assuming well casing is metal.

250.52(A)(7)
 
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Well Water Grounding

electricmanscott said:
The well casing is on the list of permitted electrodes but it is not on the list of required electrodes. You can use it, you don't have to. If you do use it no rods are needed. I would bet the well casing would be better than two ground rods but if it is 200 yds from the house it would not be economical to utilize it.
Either way as stated it must be bonded to the circuit supplying the well motor.

Assuming well casing is metal.

250.52(A)(7)
Click to expand...

I agree, it is most likely the best ground available. I believe it was once a required electrode,but don't remember the code cycle.

I find many fail to provide the required bond to the suppling circuit, and it results in a return for the ec, as I Will not pass it.
 
electricmanscott said:
The well casing is on the list of permitted electrodes but it is not on the list of required electrodes. You can use it, you don't have to. If you do use it no rods are needed. I would bet the well casing would be better than two ground rods but if it is 200 yds from the house it would not be economical to utilize it.
Either way as stated it must be bonded to the circuit supplying the well motor.

Assuming well casing is metal.

250.52(A)(7)
Click to expand...


Yes you're correct, it is a permitted electrode but not a required one. Sorry for the confusion.:rolleyes:
 
Never said it was required, but assuming your intent is to achieve a low impedance connection to earth I'd lay money that in the average installation the well casing beats the required two rods.
 
brian john said:
Never said it was required, but assuming your intent is to achieve a low impedance connection to earth I'd lay money that in the average installation the well casing beats the required two rods.
Click to expand...


I agree with that....
 
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