MikeD wrote:techiefan: Thanks for your last useful response! One quibble I have, however, is that I found the 1-gang PVC Carlon E980EFN FSE Box (19 CU in) not only adequate by 2017 NEC box fill standards (3 x 5 cu in < 19 cu in [vs 32 CU in for a similar 2-gang box]), but preferred because this box provides for a total of 6 receptacle mounting points instead of the 2-gang box's only 4 mounting points. I note also the 1-gang box is deeper than the 2-gang box, which might be important depending on which manufacturer's 14-50R receptacle you decide to buy.
I grant you, however, that the significant difficulty in working with the very stiff 6 AWG wire might cause one to prefer the 2-gang over the 1-gang box!
It might be useful to have posted detailed pictures of good 14-50R installs for the DIYers. Anyone?...
As far as I know the 1-gang PVC Carlon E980EFN FSE Box would be for exterior wall mounting with the use of PVC as needed for exposed wiring in a garage, but they do make a deeper 1 gang box "old work" that probably would work. In the past I have always come across a 2 gang box for a 14-50R but a far as I know it's not a code thing, just having enough room inside is etc.
Getting the 14-50R into place is a pain so have the extra room is nice.
I took pictures but can't post them here and don't want to host them but really there is not much to see. The entire install is fairly basic just with stiffer wire and a larger receptacle using 240v (two hots instead of one).
Hardest part for most would be getting from the panel to the location of desire. I say this because getting wires in walls from point A to point B can by for many a daunting task and add 6 AWG to the mix. It gets more complicated when ones panel is recessed with sheetrock all around it as you have to very carefully cut some out for access. In my case my panel was located in my basement which was fully exposed and my basement has drill (hole) access from below up into a wall cavity in the garage. So the entire job took about 2 hours and cost about $80. When I add the GFCI breaker the total cost will be around $160. 50 AMP GFCI breakers are expensive, but swapping it out should take about 30 min.
Thanks for the feedback too!