I plan to install a NEMA 6-50 outlet in my garage, from a 50A breaker in the main panel. I plan to use 6/2 cable, unless there is a better recommendation. The run is about 50 feet, planned as follows:
a. about 20' along joist in basement
b. drill through block basement wall, exiting just above the floor of the garage
c. up wall of garage, through drywall ceiling into garage attic
d. across ceiling joists in attic
e. straight down through ceiling to outlet.
My questions pertain to steps b, d, and c/e.
b: When passing the wire through the block wall, is conduit required? I don't believe so, but please advise.
d: I under stand that the NEC permits the wire to run across the ceiling joists unsecured, provided that the attic is inaccessible (no permanent stairs, which is the case here--I have to use a ladder and climb up) and the wire is run at least 6' from the opening, which will also be the case here.
c and e: I assume conduit IS required for runs up and down the garage wall, otherwise the cable would be exposed to damage. So, I'm planning to use 3/4 PVC conduit, based on these factors:
NEC requires that cable take up no more than 53% of the space inside the conduit; Outside diameter 6/2 cable = .3664; Inside diameter 3/4 PVC conduit = .824 (Link to home depot 3/4 Conduit for specs); Thus, cable will occupy only 44% of the conduit.
Please let me know your thoughts on these plans.