Since I plan on running 10/2 cable for the water heater I might as well run another 10/3 cable for the dryer in the same conduit and install a new NEMA 14-30R.
Do I need a GFCI breaker for the dryer circuit? For the water heater I need a regular breaker right? See photos of the panels.
What conduit do you recommend? PVC, EMT, or RMC? What size to be able to fit both cables? I don't need any junction boxes anywhere right? I'm thinking LB conduit body above the subpanel, and type-T conduit body at the top left where the two runs will split.
Is a water heater disconnect needed? Is a flexible conduit needed from the disconnect box or the type-T conduit body or can I just have the cable connected on top of the water heater?
I'm in Sunnyvale, CA. The water heater is in the corner on the left behind the fridge.
EDIT: After more research and the answer and comments below I'm thinking of going with boxes instead of conduit bodies:
- Instal a metal box by the ceiling (top right of my photo).
- Fish 2 NM cables (10/2 and 10/3) vertically to the panel (unsupported cables per NEC 334.30(B)).
- Install another box by the ceiling (top left of my photo).
- Run a 1/2" EMT with 5 10 AWG THHN horizontally between the two boxes.
- Connect a flexible conduit for the water heater in the top left box
- Run a vertical 1/2" EMT with 3 10 AWG to another box that will have the dryer outlet.
- Securely fasten the EMT within 3 ft of each box and at least every 10 ft.
- Add a GFCI breaker for the dryer circuit but not for the water heater since it will be hardwired.
- Skip the disconnect for the water heater since the panel is within sight (about 12 feet away).
- Ground pigtail all three boxes. Splice the two NM cables and ground pigtail to the top right box.
- Add a ground wire in the flexible conduit to the water heater and splice it with the ground pigtail in the box.
- The 5 wires in the conduit will be spliced only in the top right box with the NM cables and they will terminate to the water heater and dryer. i.e. they won't be spliced in the top left box.