- 1). Turn off the main circuit breaker located at the top of the panel box.
- 2). Loosen the screws on the panel cover and remove it, exposing the electrical wiring.
- 3). Locate the wiring for the pool. The numbers and colors of the wire vary depending on the voltage of the circuit. A 110-volt circuit has three wires--black, white and bare copper. A 220-volt circuit has four wires--black, red, white and bare copper.
- 4). Insert the GFI breaker in the panel box. Look at another breaker in your panel to model the installation in the same way.
- 5). Wire the GFI breaker to the pool load wires. Strip one-fourth of an inch of insulation off the hot or black wire and slide it under the set screw at the back of the GFI breaker labeled "load." Tighten the set screw to hold the load wire securely. Strip one-fourth of an inch off of the remainder of the pool load wires and slide the white wire under the set screw on the GFI breaker labeled "white line neutral" or "neutral line." All the neutral wires connect to a common neutral bar, and the curly wire on the back of the GFI breaker will attach there also. Slip the pre-stripped curly white wire under a set screw on the neutral bar and tighten securely. Should you have an additional red load line, attach it under the second set screw on the breaker labeled "load line."
- 6). Replace the cover panel and turn the main breaker back to the on position.
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