[jyl]

Okay, subpanel is installed and operating. No, I didn't re-use old wires or old breaker. New 60A 2 pole breaker, new 6 gauge THHN in conduit with separate neutral and ground.

(Hey, I never claimed to work fast).

Now to install the circuit for the dishwasher. It requires 240V 50A (4 wires incl ground) and the installation manual specifies 8 gauge wire.

The simplest path for the circuit is vertical from the sub panel (on a basement wall) up to the floor joists, horizontal across the joists to the dishwasher location along the kitchen exterior wall, then vertical through the floor and up the wall to the outlet under the kitchen counter. The run is about 15 feet. The dishwasher location is next to the kitchen sink.

I plan to use 8 gauge THHN wire in 3/4" (correction: 1") Sch 40 PVC conduit. I plan to fasten the conduit to the underside of the floor joists. Under the kitchen counter, I plan to surface mount the conduit and outlet to the wall. Since the outlet is in the kitchen, I believe GFCI protection is required. I plan to use a 240v 2 pole 50A GFCI breaker ($100!) in the subpanel.

My questions, for the PPOT braintrust:

1. Any problems you see with the run and conduit plan? I want to use conduit instead of Romex (is there even 50A Romex?) for additional protection. I want to fasten the conduit to the underside of the joists and to avoid drilling 3/4" holes in old joists.

2. Any problems with surface mounting the receptacle box under the kitchen counter? This is so that I don't have to install conduit inside the existing wall and drill 3/4" holes in old sill plates, or to make a conduit-to-Romex transition. (I do need to verify there will still be sufficient under-counter depth for the dishwasher.)

3. Any problems with getting the GFCI protection at the breaker, instead of at the receptacle? I'm not finding any GFCI 240v 50A receptacles.