How hard is it to install nema 14-50 by myself? And also, what things should I prepare for it? The panel are inside the house, but there are already hole on the wall, just wonder how hard is it to do it myself as no experience in those kind of electricity work. But I am a engineer major. I already bought, 50A breaker, 6/3 nm-b cable, receptacle. Wire cutter already have, screwdriver also. Been reviewed some Youtube video for how to install it, for me no in the wall wiring requirement, it really looks like plug the breaker in, plug the cable in both cable and receptacle, and done. The total amp for the board is 100A I think, and there are likely 4 window 6000 BTU AC run at same time at night while charging. By the way, is UMC water proof?, should I unplug it if in the rain?