When my kids were growing up I had two consumer units in the workshop. One, which supplied the lights and a couple of 13A sockets in a ring main and the other for my machines. This had a 100A isolator, similar to the 32A one shown earlier, but was before the consumer unit. I could therefore isolate and lock out (padlock through the locking holes) all my machines from use by curious fingers with one ‘master switch’. As it turned out, none of my 3 boys had the slightest interest or intention of ever going into the workshop! I’m not sure any of them know which end of a hammer to hold!