In an industrial manufacturing plant environment, we have 220VAC Single Phase equipment on the production floor. These include, Cut-off Saws, Pedastil Drills, Filter Extractor Fans and Sand blasters amongst others. These units are plugged into wall sockets at various locations around the Factory. All of our 3 phase units have isolator lockouts that incorporate a tagging system to lockout the power on the machine. As far as regulations go, I can not find what happens with units that are plugged in. Like a cut-off saw, that is moved from time to time around the factory. Whenan electrician is working on one, and he has unplugged it, there is no lockout provision as with a 3-phase isolator that is installed onto the 3-phase machines.
I can't seem to find a decent answer anywhere including in the standards. If any one has an idea on this, please could you help me out.