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RE: Tony Hicks Electrical Safety Letter in MEW 248

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Mike Poole05/11/2016 12:08:17
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I have met plenty of people who think they know what they are doing, these are the people who are probably most at risk. There is no shame in asking if you are uncertain and people with the knowledge should give freely and not ridicule someone for not knowing.

Mike

Mike Poole05/11/2016 12:20:13
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In the Workshop Practice book on electric motors is is recommended that to prove a circuit is isolated it is shorted with a screwdriver. I struggle to think this is a good idea, if the circuit is still on, it is going to damage the screwdriver and maybe eject molten bits of screwdriver or terminal. I do not think the short test proves the circuit is dead anyway, all you have proved is that there is no circuit between whatever you have shorted out. If you do not have the means or knowledge to test for isolation should you really be working on electrical equipment?

Mike

Michael Gilligan05/11/2016 12:53:55
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Many a true word was spoken by Donald Rumsfeld: **LINK**

https://jxb.oxfordjournals.org/content/60/3/712.full

... It's the unknown unknowns that end up biting you.

MichaelG.

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