In most cases, a trench will be dug from your electric panel to the equipment location. This conduit by code must be metal, wrapped with insulation, and buried 6" underground. It is important to mark any sprinkler lines or other obstructions that must be protected. The conduit must remain uncovered until the city inspects it. GFI circuits protect all light and electrical plugs. These are also used near sinks and bathrooms inside your house. GFI protected circuits instantly trip and shut down when contact is made with water. In addition, all steel, motors, and metal within 5' of the pool is grounded. You may notice small copper wire attach to metal windows, fences, handrails, and diving boards.