The metal double-gang box (40 yrs old) is stripped where you place the 8/32 screws. I should have replace the box in the beginning. It took me an hour or so to put a nut on both of these screws from within (not touching any wires) behind the stripped holes to hold the screws. Do most electricians replace the box or get the next size screws up (10/32)?
Answer: tap it out one size larger for
Grandfather clause may over rule the following but figured you'd like to know....
First: That box is only rated for
18 21 cubic in. capacity. You got at least 13 conductors, counting each switch as 2 conductors per Code.
- 14 AWG = 13 x 2.00 = 26 Cubic capacity
- 12 AWG = 13 x 2.25 = 29.25 Cubic capacity
Plus you're missing a ground jumper which counts as one conductor. (Devices have to be of the self-grounding type to omit bond jumper.)
The switch plate would need to add at least 5 cubic in. for it to work with 14 AWG. Otherwise, you'll need a 1900 box extension to pass muster
Lastly, you maybe wondering about using a larger course screw. While this is a quick fix certain care should be followed not to allow the sharp threads to damage conductors and not to use a longer than necessary screw. NEC 314.23(B)(1) prohibits using screws and nails