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PME earthing to a group of static caravans TT earth required?

LittlePlumb
Can anyone give me there valuable opinions on earthing to a static-mobile home please. As per BS7671, PME earthing is not allowed to (mobile) caravans. However, does a static caravan (plumbed in and permanent with a SWA cable supplying it and no plug/socket arrangement) count as a caravan. The Static caravan is metal framed, and placed some distance from the PME source 40m or so, and the cable size is 16mm CSA 3 core, so PME (100A single phase) could be exported on the cable as its greater than 10mm CSA,

The static caravan is permanent and not quite the same as a transportable caravan, so does a TT earth need to be installed?
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    In terms of the regs, maybe not, as static caravans are not explicitly mentioned.



    There have been some changes in the 18th and "residential park homes" do now get a mention in section 708. The BS 7671 prohibition on PME now seems to extends to all socket outlets on the park's installation -  whether they're supplying a caravan (tourer) or a residential park home (static). That wouldn't apply in the OP's case where the static is hard-wired though.


    Interestingly the requirement for 30mA RCD protection also extends now to fixed connections to residential park homes - so things are definitely tending away from treating statics 'just like any other building'.


      - Andy.
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    In terms of the regs, maybe not, as static caravans are not explicitly mentioned.



    There have been some changes in the 18th and "residential park homes" do now get a mention in section 708. The BS 7671 prohibition on PME now seems to extends to all socket outlets on the park's installation -  whether they're supplying a caravan (tourer) or a residential park home (static). That wouldn't apply in the OP's case where the static is hard-wired though.


    Interestingly the requirement for 30mA RCD protection also extends now to fixed connections to residential park homes - so things are definitely tending away from treating statics 'just like any other building'.


      - Andy.
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