Im putting outlets into my new Shop, planning for a 1" EMT conduit containing three circuits running from the panel box: A 20A 120V, B 30A 240V and C 50A 120/240, so 7 conductors plus the conduit ground.
The outlets will be attached to the conduit and mounted similar to the installation in this photo.
One difference is my shop has the continuous hoop connections up at the 3 foot level allowing more bolt holes (like the lowest part of this picture). The Conduit will be hung on P Clamps every 2' attached to the existing metal bolts holding the building "hoops" together.
I Plan on putting 4"x4" boxes every 4' with either a 120V dual outlet or an appropriate 240V single outlet (either NEMA 6-30 or 14-50 for the two circuit types). Since each circuit carries different size conductors it should be easy to keep them straight (12AWG, 10AWG and 6 AWG). Two different sets of circuits will run one clockwise and one counterclockwise out from the panel for 6 circuits total. Additional individual special circuits will be run for lighting (120V), a 240V compressor, and a 240V cooler. Total of ~15 spaces in my 30 space panel.
I'm in Tucson AZ under the 2017 NEC for this. Is there anything I'm doing here which seems concerning to the experts online or any additional advice I should consider?
After-report: Some more detail on How I ended up running along the Quonset hut interior. (The small handy box is just for splicing to make the pull easier) And yes there is a ground wire even though its not supposed to be required using EMT; however My inspector wanted it in [see this question: https://diy.stackexchange.com/questions/207090/conduit-for-ground-in-metal-shop ]
Best Answer
I ended up riveting the boxes to brackets and bolting those to the existing "grain bin" bolts holding the Quonset Hut Hoops together. Then ran EMT through them anchored to other bolts via P-Clamps. An important note: The boxes need to be secured rigidly, not merely hung on the conduit and supported by conduit (this would not be allowed)
I posted a picture of the final configuration in the question.