Hello everyone,
Let me preface what I'm about to type by saying I'm a complete electrical newbie and have been trying to learn for the past few weeks in preparation of wiring for my new workshop (3 car tandem garage). I am moving into a new construction home and want to add a bunch of 220 and 110 outlets with surface mounted conduit. I'm trying to figure out if I have the wiring correct as I want a single 20A, 220V receptacle and a duplex 20A, 110V receptacle in each box.
The attached image is of the first run coming out of the panel. My plan is to have a breaker for the 220 and a separate breaker for the 110 in the panel. I want to run all the 220 outlets on one circuit and the 110 on the other in this particular line (there is about 3 of these in different parts of the shop, all on their own dedicated circuits). This run will have 4 boxes (3 of which you see here, one more not pictured but the same as the right two setups continued down the line). I want to make sure that I have the wiring correct as this is the basis for the other two runs as well which would mimic this run but on the opposite wall as well as one on the ceiling.
Could someone much more intelligent than I when it comes to electrical work please let me know if this is wired up correctly or if I'm completely off base? I really appreciate the help as this is nerve wracking for me and I've been trying to figure out how to do it for the past few weeks in my head so I wanted to get something down "on paper".
I'd also like to know if I need to ground each receptacle in the box? If so, how would that work with one grounding screw in the box and two separate receptacles? Would I just add one more ground wire to each wire nut and run them both (one from the 220 and one from the 110 receptacle) to the one ground screw on the box together?
And yes, I know I can hire an electrician to do this but I won't because 1) there is a lot of work to do on this and it will get expensive very fast, 2) I want to (and feel like I need to) learn how to do this myself in case of future expansion and 3) I am already going to be shelling out a bunch of money for furniture, back yard, etc, so I'd like to save here where I feel like I can actually do this myself (hah!).
Here is a link to a larger Dropbox version of the image: https://www.dropbox.com/s/lz2r9d55gr...-wall.jpg?dl=0
wiring-plan-long-wall.jpg