I am connecting my shed to a 110V 15A GFCI-protected circuit. The wire on the side on the house is THWN inside 1/2" metal conduit. The wire going to the shed is UF-B buried direct and protected by 3/4" nonmetallic (PVC) conduit protecting the UF-B where is it above ground. This is all standard code-compliant stuff and I don't have any questions on that part. My questions are about how to connect these two conduits using a weatherproof box.
I need to connect the THWN that is inside the 1/2" metal conduit to the UF-B that is inside the 3/4" nonmetallic conduit before it goes underground. I will do this inside a weatherproof box attached to the side of the house. The box will have the 1/2" metal conduit connected to the box on the top, and the 3/4" PVC conduit connected on the bottom. I would prefer to use a metal weatherproof box, but a PVC box would be OK if it's code compliant.
Questions:
1. Metal weatherproof boxes have all 1/2" threaded holes OR 3/4" threaded holes. So, the first question is, which one to use? Whichever I uses, I would have to use some sort of adapter for one of the conduits.
2. If I use a metal box with 3/4" threaded connections, the 3/4" PVC conduit is easy to connect. Can I use a 3/4" to 1/2" metal reducer bushing for the 1/2" metal conduit? Can I made this bushing rain tight?
3. If I use a metal box with 1/2" threaded connections, the 1/2" metal conduit is easy to connect. What would I use to connect the 3/4" PVC conduit?
4. I prefer to use a metal weatherproof box, but PVC weatherproof boxes are available with mixed 1/2" and 3/4" threaded connections, so the PVC box would eliminate the size adapter problem. If I used a PVC weatherproof box will this be NEC-compliant?
I need to connect the THWN that is inside the 1/2" metal conduit to the UF-B that is inside the 3/4" nonmetallic conduit before it goes underground. I will do this inside a weatherproof box attached to the side of the house. The box will have the 1/2" metal conduit connected to the box on the top, and the 3/4" PVC conduit connected on the bottom. I would prefer to use a metal weatherproof box, but a PVC box would be OK if it's code compliant.
Questions:
1. Metal weatherproof boxes have all 1/2" threaded holes OR 3/4" threaded holes. So, the first question is, which one to use? Whichever I uses, I would have to use some sort of adapter for one of the conduits.
2. If I use a metal box with 3/4" threaded connections, the 3/4" PVC conduit is easy to connect. Can I use a 3/4" to 1/2" metal reducer bushing for the 1/2" metal conduit? Can I made this bushing rain tight?
3. If I use a metal box with 1/2" threaded connections, the 1/2" metal conduit is easy to connect. What would I use to connect the 3/4" PVC conduit?
4. I prefer to use a metal weatherproof box, but PVC weatherproof boxes are available with mixed 1/2" and 3/4" threaded connections, so the PVC box would eliminate the size adapter problem. If I used a PVC weatherproof box will this be NEC-compliant?