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P.M.E. and Potato Peelers.

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About 2 years ago I was asked to undertake electrical work at a local chip shop/fast food outlet. I was concerned about large metal drummed wet potato peeling machines located on a wet floor in an old outbuilding and the P.M.E. earthing system. I could not devise a safe system in my mind where the large potato peeling machines positioned on a wet stone floor could be made safe with the P.M.E. earthing.


Anyway, unfortunately recently the place burned down and is now boarded up. The cause may not be electrical, but due to oil catching fire.


I have not done any work in the building at all.


Because the machines could not be effectively TT earthed I did not proceed with any work.

https://www.edp24.co.uk/news/norfolk-norfolk-fire-at-mundesley-business-7985784


Z.
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  • 0
    whjohnson:

    I just winder if there is too much paranoia surrounding the loss of a neutral in a PME system in a built-up area. Maybe different out in the sticks, but with local substations being relatively plentiful in urban areas what is really the risk?


    You could well be right.  Lower risk than we perceive perhaps. I was going through a concerned phase at the time. The 14th edition used to require that single phase sockets on different phases be kept at least 2m apart. Was there really a risk if single phase appliances were supplied by sockets on different phases? What were the real life reported accidents?


    Z.


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  • 0
    whjohnson:

    I just winder if there is too much paranoia surrounding the loss of a neutral in a PME system in a built-up area. Maybe different out in the sticks, but with local substations being relatively plentiful in urban areas what is really the risk?


    You could well be right.  Lower risk than we perceive perhaps. I was going through a concerned phase at the time. The 14th edition used to require that single phase sockets on different phases be kept at least 2m apart. Was there really a risk if single phase appliances were supplied by sockets on different phases? What were the real life reported accidents?


    Z.


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