There are two main ways to ground a submersible pump, ensuring electrical safety and preventing potential hazards.
Methods for Grounding a Submersible Pump
Proper grounding protects against electrical shock by providing a path for stray current back to the source. Here are the two accepted methods:
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Continuous Metal Path: If you're using metal pipe from the pump's discharge head all the way to the pitless adapter, this creates a continuous metal path to the well casing. This acts as the ground.
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Separate Ground Wire: If you're using plastic pipe, you must run a separate ground wire. This wire should be the same size as the supply conductors.
| Method | Description | Material Used |
|---|---|---|
| Continuous Metal Path | Utilizing a continuous run of metal pipe from the pump discharge head to the pitless adapter, connecting to the well casing. | Metal pipe (e.g., steel, copper) |
| Separate Ground Wire | Running an independent ground wire, sized identically to the power supply conductors, alongside the plastic pipe. | Ground wire (typically copper), plastic pipe |
Importance of Correct Grounding
- Safety: Reduces the risk of electric shock.
- Equipment Protection: Helps prevent damage to the pump and other electrical components.
- Code Compliance: Required by electrical codes to ensure safe installations.
Example Scenario
Imagine you're installing a submersible pump in a well with PVC (plastic) piping. Because PVC doesn't conduct electricity, you must run a separate ground wire down the well alongside the pump's power cable. This wire connects to the pump's ground lug and then to a grounding point at the surface, typically the electrical panel's ground bus.
By following either of these grounding methods, you ensure a safe and properly functioning submersible pump system.
