Which materials are best for submersible pump wiring?

Choosing the Right Wire Gauge

When selecting the wire gauge for submersible pump wiring, consider the length of the wire run and the expected current draw of the pump. A longer wire run requires a larger gauge wire to prevent voltage drop and ensure reliable operation. For example, a 200-foot wire run with a 2-horsepower pump may require a 14 AWG wire, while a 100-foot run with the same pump can use a 16 AWG wire.

Wire Insulation and Jacketing

The insulation and jacketing of the wire are critical to its performance and longevity underwater. Teflon-insulated wire is a popular choice for submersible pump wiring due to its high resistance to moisture, chemicals, and abrasion. For added protection, use a wire with a Teflon-insulated jacket or a wire with a PVC jacket rated for underwater use. When installing the wire, be sure to secure it to the well casing or pump motor with a wire tie or other suitable method to prevent damage from abrasion or vibration.

Wire Installation and Testing

Proper installation and testing of the wire are essential to ensure reliable operation of the submersible pump. When installing the wire, follow the manufacturer’s instructions and use a wire stripper to remove the outer jacket and expose the insulation. Use a multimeter to test the wire for continuity and insulation resistance before submerging it in the well. A minimum of 1 megohm insulation resistance is recommended to ensure reliable operation and prevent electrical shock.