How ironic. I would love to have your knowledge of industrial electrics. Instead I only know how to wire house/offices etc. I think industrial electricians are real electricians somehow. Its the real deal in with 11kv and up I am only graded to 1kv. Still at least I am relatively safer in domestic office environments. At my age it is too late to pick up the knowledge of industrial electrics but would have loved to really. I cant imagine why you would want to go domestic, but welcome anyway. I think there is something to what Hightower said. Having been around domestic light commerciall installation for forty years I feel quite happy to move over to Inspecting and testing instead of the hard graft of installation. Crawling under floorboards crouching in lofts up and down ladders and stairs. But years of that is what gives the basis of later inspection and testing. As you know every little subtlety of house/office wiring. I imagine its the same if I tried switching to industrial, I dont think I could really do it now. I'd start with your own house if you have not already and try a few friends houses first for EICR. Its one thing in the classroom but so very different in the real world and there are so many things to check and tick it can get a bit crazy, you really have to have your marbles about you. I wish you good luck with your change. And once again welcome.