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Shock Likelihood at Switch.

Zoomup
Mornin' All,


I have just inspected and tested a renovated  old flat's wiring. The original lighting wiring in places has no circuit protective conductor. The owner has installed metal plate light switches to two positions with wooden back boxes. At these two positions there is no circuit protective conductor. The flat has a new R.C.B.O. consumer unit and all other wiring is good.


I have recommended that the switches have a C.P.C. installed (difficult and disruptive) or be changed to all insulated types.


Just what is the shock risk at these two switch positions? What is the likelihood of the metal plates becoming live due to a fault? Has anyone every seen a metal plate switch break down so that the plates becomes live?


Thanks,


Z.

  • Former Community Member
    0 Former Community Member
    I have recommended that the switches have a C.P.C. installed (difficult and disruptive) or be changed to all insulated types.

    Just what is the shock risk at these two switch positions? What is the likelihood of the metal plates becoming live due to a fault? Has anyone every seen a metal plate switch break down so that the plates becomes live?


    Your issuing of an EICR will have either deemed it satisfactory or unsatisfactory, so is this topic seeking an accomplice if you have already signed to say it is satisfactory?


    Regards


    BOD


  • 0
    Passed as satisfactory with rider as a get out of jail free card.


    Andy B.
  • 0

    perspicacious:
    I have recommended that the switches have a C.P.C. installed (difficult and disruptive) or be changed to all insulated types.

    Just what is the shock risk at these two switch positions? What is the likelihood of the metal plates becoming live due to a fault? Has anyone every seen a metal plate switch break down so that the plates becomes live?


    Your issuing of an EICR will have either deemed it satisfactory or unsatisfactory, so is this topic seeking an accomplice if you have already signed to say it is satisfactory?


    Regards


    BOD




    BOD, I just love your insight. "If" is such a useful word. ?

  • 0
    I wonder if I mention wander lead and insulation tester what response I will get?


    Andy B.
  • 0
    Wander lead and a loop tester located the two unearthed metal light switches. Insulation tests carried out at consumer unit all good.


    Z.
  • 0




    Your issuing of an EICR will have either deemed it satisfactory or unsatisfactory.



     




    Indeed that is true. Which C, which C, that is the question? Whether tis nobler in the mind to  suffer the slings and arrows of outrageous fortune.......


    Z.

  • 0

    Zoomup:

    Wander lead and a loop tester located the two unearthed metal light switches. Insulation tests carried out at consumer unit all good.


    Z.




    Insulation test between the lives and the metal plates of the switches?


    Andy B.

  • 0

    Sparkingchip:




    Zoomup:

    Wander lead and a loop tester located the two unearthed metal light switches. Insulation tests carried out at consumer unit all good.


    Z.




    Insulation test between the lives and the metal plates of the switches?


    Andy B.


     




    The customer fitted metal plate switches are brand new and nobody is getting shocks from them. I have recommended that they be earthed or changed for all insulated ones. I am not going to endorse them by testing them.


    Z.


     

  • 0
    As I recall it that was the Electrical Safety Council aka Electrical Safety First guidance.


    Andy B.
  • Former Community Member
    0 Former Community Member
     I am not going to endorse them by testing them.


    If you've issued a "satisfactory", you have already endorsed them................................


    Regards


    BOD

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