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Caravan electrical hook up?

D4G
I've been asked to install a supply to a hook up for a caravan in a garden.

I see that the connection of a PME earthing facility to any metal work is prohibited, is there anything else I may have overlooked?


Thanks in advance :)
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    IET Guidance Note 7 recommends a separation distance of 10 m below ground between the TT earth electrode of a caravan, and a PME system used to supply it.


    However, that may be problematic in many domestic premises, because of a "return of touch potential" issue - this is covered in Annex H of the 4th Edition of the IET CoP for EV Charging Equipment Installations (example in Figure H.4).



    "Just TT it" isn't always a good solution.
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    IET Guidance Note 7 recommends a separation distance of 10 m below ground between the TT earth electrode of a caravan, and a PME system used to supply it.


    However, that may be problematic in many domestic premises, because of a "return of touch potential" issue - this is covered in Annex H of the 4th Edition of the IET CoP for EV Charging Equipment Installations (example in Figure H.4).



    "Just TT it" isn't always a good solution.
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