I installed a 14-50 outlet in my garage with NM-B 6/3 cable and now I'm ready to patch up the holes in the drywall and I was wondering if I should fasten the cable to the studs. I looked at NEC 300.19 and table 300.19(A). The cable goes from the breaker panel (2nd story) to the garage (1st floor) like this: 6 ft from the breaker panel to the floor, 1 foot between the floor joist to the top plate garage wall, then 8 ft (thru a fire block) to the outlet below. If I read the NEC right, I only need one staple below the top plate and another between the breaker panel and the floor. Am'I right?