Here is a mini quiz,visited a supplier today,went to large side roller-shutter door to load up and noticed control box with isolator inside at side of door.Isolator (rotary) was locked off with combination padlock in the ON position.I asked the proprietor if there was a reason for this and he said "company policy" to prevent "messing". I asked him if he could think of any reason this would be a bad idea and fairly quickly,he thought up a couple of tricky scenarios,but he had a memo so that was that! My question would be,bearing in mind what is its use,can anyone think up a justifiable reason that say,a legal representative,could put forward.....:devil: