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Shock Likelihood at Switch.

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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.

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  • 0

    perspicacious:

    Is it just me, but I cannot see why an unsatisfactory could not have been given and once the remedial work had been carried out (apparently the minor works of fitting some insulated switches), a satisfactory issued?


    Is it because one wants to be seen as "nice"?




    Yes, but the customer may not want remediation, especially if the appearance is everything. ?



    Alan Capon:

    What code for a wooden back box? 

    Are we really talking about a wooden back box, or just a wooden surround?


    I have installed those wooden sockets and switches. Now then, how can I be polite? I wasn't impressed by the quality. ?
Reply
  • 0

    perspicacious:

    Is it just me, but I cannot see why an unsatisfactory could not have been given and once the remedial work had been carried out (apparently the minor works of fitting some insulated switches), a satisfactory issued?


    Is it because one wants to be seen as "nice"?




    Yes, but the customer may not want remediation, especially if the appearance is everything. ?



    Alan Capon:

    What code for a wooden back box? 

    Are we really talking about a wooden back box, or just a wooden surround?


    I have installed those wooden sockets and switches. Now then, how can I be polite? I wasn't impressed by the quality. ?
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