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ZS Testing

Discussion in 'Electrical Forum' started by Sparky 63, Feb 23, 2014.

Discuss ZS Testing in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Sparky 63
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    Sparky 63 Guest

    Hello Guys, when carrying a ZS test on 13amp sockets , can you confirm that all appliances have to be removed prior to the testing of the circuit,

    Thanks
     
  2. Pete999
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    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Well yes I would as a matter of course, why do you ask?
     
  3. cotty
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    cotty Guest

    Unless of course the lady of the house has her hitachi wand plugged in!!
     
  4. R G
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    R G Guest

    With a 20 amp pulse down the earth I would defo recommend unplugging appliances , not only because you could damage some appliances , you will be inducing a live supply to the casing of class 1 appliances ,,,
     
  5. telectrix
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    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    90% of the time, though it 15mA. ( no trip).
     
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  6. guest119
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    guest119 Guest


    Hold on and I'll go have a look.


    Boydy
     
  7. walsall
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    walsall Regular EF Member

    Location:
    West Midlands
    I always do. If the ELI is high there could be a shock risk while doing the test. There is always a risk that someone could be in contact with the equipment.
     
  8. spark 68
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    spark 68 Electrician's Arms

    Location:
    UK
    How do you work that out ?

    If the ELI is high enough to allow >50V touch voltage on the CPC the test aborts, my meter allows me to set this at either >= 25V or >= 50V, I would assume most other meters do the same or similar.
     
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  9. GLENNSPARK
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    GLENNSPARK Electrician's Arms

    Location:
    west yorks.
    no BS3036s left then down your way Tel?
     
  10. walsall
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    walsall Regular EF Member

    Location:
    West Midlands
    If the CPC was totally open circuit there has to be a shock risk.
     
  11. spark 68
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    spark 68 Electrician's Arms

    Location:
    UK
    But the test aborts in that case.

    What I was getting at was if you look at all of the calcs in the regs concerning Bonding, sup bonding, RCDs, Earth rods on TT, they are all concerned with stopping the touch voltage from rising above 50V , exactly the same as your meter does during the test, for the same reasons.

    By your reasoning you could have a fully compliant system (albeit on the edge), that could be err... dangerous in the event of a fault, which is precisely what the regs are designed to prevent. no?
     
    • Like Like x 1
  12. GLENNSPARK
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    GLENNSPARK Electrician's Arms

    Location:
    west yorks.
    yep...

    i read that one...and thought it was drivvel....
     
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