Quote:
Originally Posted by TonyDuell
I was taught 'All wires are live until _you personally_ have proved they are not' I would never joke about isolating a circuit, but if you are working with me, I would not be insulted if you verified that. In fact I would expect it. Similarly I would hope you would not be insulted if I check the wires were dead. Anyone can make a mistake...
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Back in my BBC days one of my tasks was to isolate and earth down 11KV enclosures so the tech could go in and do maintenance. One wise old tech watched me calmly as I went through the process for him, opened the door and handed him the keys. Then he said "Well if it's dead, you go and put your hands on it". That really made me think and I've never forgotten that lesson.