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Thread: Grounding a submersible pump

  1. #1
    DIY Member Arky217's Avatar
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    Default Grounding a submersible pump

    Just had a well drilled with a PVC casing; for lightning protection, driller said to tap into the ground wire at the well head and run the tap to a driven ground rod near the well head.

    In other words, the ground wire from the service panel is to go to a driven ground rod located near the well head and then continue on down the well to the pump ground.

    Does this sound right ?

  2. #2
    DIY Senior Member craigpump's Avatar
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    We run the ground from the pump to the well cap & casing and then to the controls in the house. The electrician then grounds it back to the breaker box.

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    DIY Member Arky217's Avatar
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    Quote Originally Posted by craigpump View Post
    We run the ground from the pump to the well cap & casing and then to the controls in the house. The electrician then grounds it back to the breaker box.
    That makes sense if the casing is metal, but mine is PVC. So, would a ground rod subsitute for the metal casing ?

  4. #4
    DIY Senior Member craigpump's Avatar
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    You shouldn't have to do that if the breaker box already has a ground rod.

  5. #5
    DIYer, not in the trades LLigetfa's Avatar
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    Quote Originally Posted by Arky217 View Post
    So, would a ground rod subsitute for the metal casing ?
    A single ground rod would be a poor substitute to what a metal casing can do in so far as dissipating lightning. It would probably take a dozen ground rods to be the equivalent of what a metal casing can be. Code would require that you use #6 wire to bond between grounds.

    Lightning protection is complex and the amount of protection needed can vary by the situation. I have done work in that field, grounding high tension lattice towers for the POCO. For comprehensive protection, each situation needs to be evaluated and in the end, the cost of the protection needs to be weighed with the cost of replacement.

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