Wiring Matters Mythbuster articles.

Many thanks for the Mythbuster Articles. In Mythbuster #6 there is the following statement

" In itself, this is not a problem, as there is no risk of shock, but a second fault on another item of equipment or a distribution cable could present a shoc

See https://electrical.theiet.org/wiring-matters/years/2020/82-september-2020/mythbusters-6/#:~:text=All%20generators%20need%20to%20be%20earthed%20unless%20floating for Mythbusters #6

Please can you explain further, as my understanding is that if the two class 1 pieces of equipment have their exposed metal parts connected together via the earthing system then I cannot see how a shock risk would occur. If the fault to earth was L1 on both of them then not an issue as such, if one was L1  & one was L2 then fult current would flow and cause the fuse or MCB to trip.

Parents
  • James Eade did a presentation during a NAPIT event at Birmingham City Football Club a few years ago, and he explained some of the issues with temporary electrical installations. 

    I'm still tempted to attend a BS7909 course to learn more,  basically everything should be plug and play having been tested before arriving on site,  but it still needs a very good understanding of possible issues to ensure it's all safe. 

    The actual webpage:

    electrical.theiet.org/.../

Reply
  • James Eade did a presentation during a NAPIT event at Birmingham City Football Club a few years ago, and he explained some of the issues with temporary electrical installations. 

    I'm still tempted to attend a BS7909 course to learn more,  basically everything should be plug and play having been tested before arriving on site,  but it still needs a very good understanding of possible issues to ensure it's all safe. 

    The actual webpage:

    electrical.theiet.org/.../

Children
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