I have educated myself about gfci's although I am a diy'er. My gfci has my dock plugged into it. About once a year it trips and can't be reset only replaced. All outlets on the dock are weather proof. I am trying to find out if I need to rewire the dock or if the supply to the gfci can cause the tripping. This is a critical issue I need to resolve as I understand the implications of swimming near the dock if electrified. Again, I'm concerned that if I replace the dock wiring and the supply to the gfci is causing the tripping then I have to replace the supply side, not an easy task.