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Electrician videos on Youtube. Are they dangerous to all?

David Stone

I was watching a bit of a Youtube video, which showed a DB with very "tidy" wiring, of the type that now appears to be in vogue. A large number of circuits were all bundled and cable tied into a very neat cable form of the type found inside Electronic equipment. The length of this was probably a couple of feet, so comes under the regulations for derating of cables in close proximity, and the overall rating of each circuit was probably 1/4 of that the designer expected. The cables inside switchgear should all be loose and as far as possible in free air to keep temperatures within limits, and as you know DBs get quite hot even with this arrangement. How have we got to this situation of incompetence? I did leave a comment, but this will probably be removed!

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  • 0

    In a way YouTube doesn't introduce any new problems with misinformation that we didn't have before - remember "An Illustrated Explanation of Earthed Equipotential Bonding" by our Mr Cockburn - disseminated with Caxton era technology. YouTube may make it somewhat cheaper and easier - but that also has the result that the audience is probably far more aware that it may contain dross and are less likely to take it as definitive that previous "text book" generations.

       - Andy.

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  • 0

    In a way YouTube doesn't introduce any new problems with misinformation that we didn't have before - remember "An Illustrated Explanation of Earthed Equipotential Bonding" by our Mr Cockburn - disseminated with Caxton era technology. YouTube may make it somewhat cheaper and easier - but that also has the result that the audience is probably far more aware that it may contain dross and are less likely to take it as definitive that previous "text book" generations.

       - Andy.

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  • 0 in reply to AJJewsbury

    In the days when one had to go to the central reference library, there was an element of editorial control. That is absent online. 

    Some manufacturers put films on there; some from people like EFixx seem to be thinly disguised adverts, but reliable; some are downright unhelpful. The real question is whether the intended audience can tell them apart.

  • 0 in reply to AJJewsbury

    Oh god, that was a truly dreadful book. I'd forgotten just how bad until you brought it up.
    But at least the more responsible publishers had warnings - I had a few books that had an inset fly leaf  warning for the foreign reader that American circuits would be designed to a level of safety suitable for for 115V and references to neutral earthing practice may be inappropriate.
    Mike

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