Still no voltage

Following my previous posting on No Voltage Release switches, I’ve done some further research. Both my pillar drill and bench grinder already have these fitted, the lathe definately does not. Whilst searching the web for these switches, I found several
No Voltage

A local powercut launched a discussion about what would happen if I’d been machining something in the workshop whilst that happened. Well if it had been dark it might have been a little scary whilst all the equipment powered down