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Shock Likelihood at Switch.

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 Chris Pearson over 5 years ago

Alan Capon:

As others who have done it will agree, being an expert witness isn’t the easiest thing in the world, especially if the judge reads up on the subject!

If you want to understand the subject of noise-induced hearing loss (Zoomup, have you got those ear plugs yet?) you may be well-advised to read HH Judge Inglis's judgment in the northern textile workers' case.
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0 Chris Pearson over 5 years ago

Alan Capon:

As others who have done it will agree, being an expert witness isn’t the easiest thing in the world, especially if the judge reads up on the subject!

If you want to understand the subject of noise-induced hearing loss (Zoomup, have you got those ear plugs yet?) you may be well-advised to read HH Judge Inglis's judgment in the northern textile workers' case.
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Shock Likelihood at Switch.

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