EHU

Discussion in 'The Beginner' started by Mick James, Aug 26, 2014.

  1. Mick James

    Mick James Read Only Funster

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    HI all, was checking my ehu lead and noticed it is only twin wired with no earth, is this ok or dangerous. I have been using it the last seven months.
     
  2. Gellyneck

    Gellyneck Funster Life Member

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    NO!!!
    Should be earthed.
     
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  3. pappajohn

    pappajohn Funster Life Member

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    Bin it........

    No earth = no personal protection, and that includes anyone touching metal parts outside your van if the chassis becomes live.

    RCD protective breakers rely on an earth to be able to trip....no earth, no trip.
     
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  4. Mick James

    Mick James Read Only Funster

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    Thank you, will change it today :)
     
  5. iceni

    iceni Read Only Funster

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    Get a socket mains tester and plug it into a free socket each time you hook up. This would have shown this up immediately. Also shows any dodgy site sockets up. Only a few quid from an accessory shop.
     
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  6. Badknee

    Badknee Funster

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    Used my socket tester once and live and neutral on the site plug were wrong way round!:oops:
     
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  7. DavidG58

    DavidG58 Funster

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    and then what did you do?

    I wouldn't check, but if told it was wrong what do you do?

    Rewire one end of the lead? or just get on with it?

    Question is open to all not just aimed at you bad knee you have just raised a query that niggles me, as I don't know what to do
     
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  8. scotjimland

    scotjimland Funster Life Member

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    Been debated often on here... I am in the 'doesn't matter ' camp..

    first of all AC does not have 'polarity' .. so it cannot be wrong.. AC by it's very nature changes polarity 50 times a second. It has a LIVE and NEUTRAL .. and no matter which way round it is connected all appliances work, all safety devices work..

    So where is the risk ?

    Well, when you switch an appliance off at the socket and it is wired with 'reverse polarity' you are only breaking the neutral feed, the live is still present.. not an issue unless you intend to poke around inside the appliance with it still plugged in.. and if you do.. and it goes 'bang', .. the gene pool has one less numpty.

    The other camp say it is dangerous and lethal .. and if you feel better having it the 'right way round' buy a socket polarity tester and a short reverse polarity lead..

    Continental vans have double pole switches that break both Live and Neutral.. that' is why they don't bother or care which way it is wired..

    you decide..
     
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  9. Badknee

    Badknee Funster

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    I reported it to the site manager who said they had been having problems with that plug stand so I offered to rewrite the whole stand, six sockets,ejob done. If you can't do that move stands if your cables long enough or move pitches.
     
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  10. Badknee

    Badknee Funster

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    Don't you just love predictive. I rewired the stand, job done.
     
  11. Badknee

    Badknee Funster

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    Ah well there you go, I'm not in your camp.
     
  12. DavidG58

    DavidG58 Funster

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    Thanks (y)
     
  13. motorhomer

    motorhomer Read Only Funster

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    I agree that the risk, if there is one at all, is minimal with regard to "polarity" - by which I mean reversed live / neutral. But if the earth / neutral are reversed it becomes much more serious. So if travelling in suspect foreign parts (eg morocco) it is worth carrying a checker and making sure.
     
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  14. Techno

    Techno Funster Life Member

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    I'm in Jim's camp (y) well put.
     
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  15. pappajohn

    pappajohn Funster Life Member

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    then the site manager is a fool.....as are you.
    if anyone gets a shock, possibly fatal, you are the one responsible for that shock......unless you officially tested and certified it to be safe.
     
  16. pappajohn

    pappajohn Funster Life Member

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    earth neutral reverse......the moment anything is plugged into that socket it will trip.

    dead short to earth.
     
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  17. Badknee

    Badknee Funster

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    Thank you I am aware of that and all work was carried out and tested by me but once again thank you for your concern.
     
  18. motorhomer

    motorhomer Read Only Funster

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    Not convinced that papajohn is right. Alt
    I agree that if you connect live direct to earth current would be very high and it would trip. But the same is true if you connect live direct to neutral. But surely its not a dead short as the resistance of whatever device is plugged in would come in? Would this not be dangerous if neutral and earth were reversed - especially if the earth is poor as is often the case in some countries. You could end up with live current around the van earth circuitry. So as I said I think it is worth carrying a checker to make sure. If I am wrong then no harm done, at least I will still be safe!
    Would it be a dead short when the current would have to pass through whatever device is plugged in? And what if - as is often the case in some countries - the earth is very poor, wouldn't the van's earth circuits then be live? Personally i'd rather check and make sure.
     
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  19. DavidG58

    DavidG58 Funster

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    Electrics are really dangerous, anything you cant see scares to bee jeezus out of me

    But putting a practical hat on here, unless you turn up at a brand new site, or just rewired at least, the EHU post must be safe or it would have killed the previous user

    There can't be many sites that would allow consecutive fatalities

    Its late and I have had a glass or two, so may be my opinion is probably not overly useful :(
     
  20. Techno

    Techno Funster Life Member

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    John is completely correct.
    Line OR neutral to earth will cause an imbalance that will immediately be reacted to by an RCD or RCBO
    If you have a faulty earth then the protective device may not operate correctly which is why you should function test the trip EVERY time you hook up.
     
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