Adding a switch to control an outside outlet
Recently built a gold fish pond in my wife's flower garden. Initially, I added an additional outside receptacle to utilize a fountain that my wife purchased for her new goldfish pond. Eventually, my wife asked if I could install a switch to control the power to the outlet. I installed an outside switch with a protective box to protect the switch and circuit from the elements. Since that point anyone touching the metal switch or the metal outlet cover gets a small shock. The very old circuit I inserted the switch into was originally run with just a two- wire (no ground) wiring. What is a quick soultion to grounding this circuit.