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How to Wire a Circuit for a Pool Pump

Wiring a circuit for a pool pump requires an understanding of 220 voltage since most pool pumps are run by 220-volt electric motors. Electrical circuits for 220 volts are wired differently than the more common 120-volt circuits. One hot wire and a neutral wire are used in 120-volt circuits, whereas two hot wires are required for a 220-volt circuit without a neutral wire. Install a disconnect switch or subpanel near the pump motor in case it needs to be turned off quickly in an emergency.

Swimming pool pumps usually require a 220-volt electric motor.
  1. Read the name plate on the pump and ensure that a 220-volt circuit is required.

  2. Mount a subpanel box on the exterior wall of the house within a few feet of where the pump will be installed. The panel box can be small since only one 220-volt breaker is needed.

  3. Run 12-2 non-metallic sheathed cable with a ground wire between the main panel and the sub-panel. The cable needs to be run through the house attic or underground. Wire on outside of the house has to be placed in 1/2-inch conduit connected to the panel boxes with box connectors and fastened to the wall with conduit straps.

  4. Remove the inside covers of the two panel boxers. At the main panel, attach the black wire in the cable to one of the terminals of a 220-volt breaker and the white wire to the other terminal. Connect the ground wire to the ground terminal in the panel box. Turn the breaker off and install it in the panel box.

  5. Connect the other end of the cable to the subpanel box by attaching the black wire to one hot terminal and the white wire to the other terminal. Connect the ground wire to the ground terminal.

  6. Run 12-2 metallic sheathed cable with ground wire from the sub-panel box to the pump. Secure the cable with cable box connectors to the sub-panel and the pump's wiring box.

  7. Attach the black wire in the metallic cable to one of the terminals of a 220-volt breaker and the white wire to the other terminal in the sub-panel box. Connect the ground wire to the ground terminal. Turn the breaker off and install it in the panel box. Connect the other end of the cable to the terminals in the pump's wiring box.

  8. Replace inside covers on breaker panels and the wiring box cover on the pump. Turn on both breakers.

Warning

  • Make sure the electricity is off when handling bare wire. Become familiar with national and local wiring codes before beginning the job.