Back in my younger days as an apprentice with a firm installing commercial communication, timekeeping, alarm and security systems..Once when I was an apprentice I was asked by my electricians to put a socket front on. I couldn't understand why when I tried to strip the insulation I kept receiving an electric shock and yet it was a new house and the supply hadn't yet been put on. Eventually after many shocks I heard sniggering. One of the electricians was on the landing watching me, the other had an insulation resistance tester connected to a socket on the ring main. each time I tried to strip the cable the sparks on the landing gave a signal for the other to power up the tester. Rotten sods.
...leaving the test kit behind for a quick escape!and I knew it was time to run!
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