I have a 50 amp 240v 4wire hot tub that I need help with. (1) Can I run 6/3 romex from the main panel in the garage, down to the basement, thru the basement to a Junction box, then out of the JB thru the basement wall with pvc 30' to a disconnect at hot tub. (2) Drive a ground rod at the tub with #6 ground wire. (3) Where the wiring passes from the garage wall to the basement it will be below 18" but it will be in a drywall wall is that ok. (5) I have been told that if the tub is setting on a concrete slab with no steel in it it must have a rubber mat under it if so who sell this mat.
