I have to question the need for 220v outlets all over the place. Most 220v outlets are installed for a specific piece of equipment that is normally parked in one spot (Lift, Compressor, welder, etc.). What portable equipment will you be using that requires that many outlets? Will all of them be the same amperage? I have a 220v 50a welder and a 220v 30a welder with one outlet for each at the welding table and on the rare occasion I need to move elsewhere in the shop I have matching 30a and 50a extension cords.
If I were you I'd lay out the outlet locations (painters tape on the wall) and have your licensed electrician tell you how he wants you to run the conduit in the building. With more than three circuits in a raceway you get into derating the ampacity of the circuits in that raceway.
Also, check with your local inspector to confirm PVC conduit is OK. It's prohibited to be used in areas where subject to physical damage, unless identified for such use. He may think your shop falls under that part of the code. I'd use EMT if I were installing it for you...
I WOULD put a 120v outlet between the doors, inside and out! That's the only location you won't ever block with a perminate piece of equipment and you'll use it ALL the time!
As for air, one hanging next to the center lift leg with 50' of hose will handle the entire shop. Maybe add one at the workbench, one at the sand blast cabinet and one outside between the doors. It you run the line up high, every time you drop down put the quick connect outlet on a Tee and install a 12" drop leg below the outlet TEE with a ball valve at the bottom so you can blow the accumulated water out from time to time. Don't forget some sort of an air dryer if you plan on sand blasting...they hate water.
Have your electrician price the entire install and then give you a deduct if you run the conduit, you may find the deduct is so small it isn't worth your time...cheaper and faster for him to do it all.
Where is the 100a main feed coming from? Is that panel/service capable of providing that much power to the shop?
Mike B
