I have a dock with a fixed pier that leads to another dock (electrically raised/lowered) and a boat lift. The power for the boat lift goes from the pier to the lift thru a waterproof flexible conduit that drops below the pier, thru a seawall, along the lake bottom, and then up the lift's steel piling to the lift. Total length of the run is about 50'. 220v, three wires. Probably 20 years old. A floating log hit the conduit and broke it below the pier just above the water line, though it didn't seem to damage the wires. The conduit is filled with water, and the wires are exposed in the gap that now exists in the conduit. The lift still operates. Clearly this needs to be fixed, I'm wondering how to do so. I could certainly replace the entire run, though that would be a pain and I'm wondering (hoping??) there is a shortcut. I could perhaps pull the wires back thru the conduit and try to blow out the water in the conduit with compressed air, then use a connector to splice the conduit back together. Not sure if this would be very effective and/or worthwhile. Thoughts? thx!

I an trying to install two 100 watt pole lights at the end of my driveway and a receptacle in a weatherproof box to run a occasional leaf blower or drill. The run from the panel is 465 feet. I have calculated I need #6 wire to make the run with a 5% voltage drop. Question is, do I also need to run a #6 ground as well, or can the ground wire be a small size such as a #8 or #10?