Does anyone have a idea where in the code it refers to the use of "homemade type of conduits and pull boxes. I know that there is an article 409 for Industial Control Panels. But like a company who employ their own electricians in a food prosessing plant and the company would like them to use stainless steel tubing for a conduit to help keep the process floor clean. Use 2" SS tubing as conduit and larger SS fittings as pull boxes. ie... 6" SS flange with short pup welded on it with a welded cap onto it with 2-2" SS tubing entering at a 45 degree angle and welded to the SS pup and have a plate bolt on to the flange for a cover.
