Hi, New member. I scored a nice 60 gallon vintage 220 air compressor that I am restoring. I also have a smaller craftsman 220 that I would like to utilize. I eventually will get a arc welder. I have a sub panel with some space, about 40-50 feet from my garage. I would like to put a panel in the garage for use of these implements. What am I gonna need? Wire sizes? Panel size (number of circuits). I want this all to be legal. Thanks for any advice. P.S. Plates on vintage compressor corroded and note sure of necessary fuse amperage. any suggestions?
Just because you have spaces in a panel does not mean that you can add to it.
You need to have a load calculation done to determine what load is currently being drawn from that panel. You also need to consider the additional load on the entire service.
Next you need to determine how much load you will need for the new sub panel. Once that is all done, calculations for your new panel wireing can be made. Wire length from the main service panel to the first sub panel then from the first sub panel to the new sub panel should also be taken into consideration.