I'm adding power for an outdoor pond, I will need four outlets in the end. I have an existing 15 amp circuit out of my main house service panel that connects to an outside wall. I want to tie into that with 12-2 and run it about 80 feet away (buried in rigid conduit) and it was suggested that I put a small sub panel on the remote end to help isolate that run later (Question 1. Is the sub panel unnecessary in the first place?). In the end I need four GFI outlets near the pond.
Concept: I was going to take a typical AC disconnect box and swap in a new 15 amp breaker. The question is about the wiring. The AC disconnect box has two main lugs and what I guess is the neutral bar at the bottom. I'm guessing I need to add a ground bar and then my incoming 12-2 will connect this way: Hot (black) to one of those lugs, Neutral (white) goes to the neutral bar, Ground (bare copper) goes to new ground bar. I assume the ground bar and neutral bar are not bonded in this scenario? Should I also bury a ground rod and tie that panel's new ground bar to the ground rod? From this new breaker I'll run the two new outlets in a separate weather proof box. I will use one GFI and then connect the second standard outlet on the load side so they're both protected. Have I described it proper or did I miss something major? Thanks!
UPDATE: Answering questions
Load to consider on the pond end:
- Pump: 12 Volt, 28 Watts, 60Hz,
- UV: 120 Volt, 60Hz, 9 Watt UV Lamp
- LED: 0.76 Watts
There is a single outlet on the existing circuit.