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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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    It is (Very?) common practice now to install as described, with the cables all a short as possible and lives cable tided together, neutrals cable tied together and earths cable tided together. Very neat. 

    The next time that DB is changed nothing will reach and everything will need to be extended. 

    The cable tied cables may well get too hot. 

    I'd prefer to see longer loops of cables and no cable ties at all. Perhaps I'm a dinosaur though. 

    On the upside - the you tube videos do promote neatness which is a good thing; often neat translates to care and a better installation than an untidy installation.

  • 0 in reply to tattyinengland
    tattyinengland said:
    I'd prefer to see longer loops of cables and no cable ties at all.

    Nothing worse than a cable which has been cut too short for a CU change! I wouldn't say NO cable ties - a small one around the two legs of a ring is not out of place.

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  • 0 in reply to tattyinengland
    tattyinengland said:
    I'd prefer to see longer loops of cables and no cable ties at all.

    Nothing worse than a cable which has been cut too short for a CU change! I wouldn't say NO cable ties - a small one around the two legs of a ring is not out of place.

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