John asks this question, which concerns caravan park regulations. It has been answered by SELECT (Theme – Regulations and Legislation):
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Question: I was after some advice regarding the BS7671 Regulations concerning the requirements for a caravan park installation.
One of our Electricians is testing at the moment and wanted advice regarding Regulation 708.553.1.14 which refers to the requirements for the socket-outlets. The system is TN-S and I am finding Regulation 708.553.1.14 difficult to interpret as it refers to a TT system in its wording.
I know a PME system cannot be used for the final connection to caravan sockets, as Section 708 confirms, but I was confused as to if it is okay to wire the TN-S system right up to the caravan socket? Also, does the "socket-outlet" referred to in 708.553.1.14 mean any internal 13A sockets outlet, as well as the external Commando style socket?
Answer: Regulation 708.553.1.14 is only applicable where the system earthing is TN-C-S (PME) and therefore would not apply where the system earthing is TN-S.
The remainder of Regulation Group 708.55 applies to plugs and socket-outlets at the caravan pitches, not within the caravans themselves. Refer to Section 721 regarding socket-outlets within individual caravans.
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