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Caravan hook up

Former Community Member
Former Community Member
Hi I am fitting a caravan hook up on the wall next to  the dno incomer box. No wires exposed. Do I still require an earth rod. The earth bond will be prob 1 ft long inside so not exposed. I know if I fit the box away using swa then yes earth rod would be used.
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    AJJewsbury:
    Who would keep such reports - there's not a statutory duty to report such failures.

    If there was no evidence of problems why did JPEL think is necessary to delete the PVC (H05VV-F) option?


       - Andy.


    Round in circles I think here. I've had experience of water migration through PVC, I've pointed to some information from a cable manufacturer who says the same thing.

    Whilst I wasn't involved in producing Section 721 for the 17th Edition, I do know that it arrived in HD prior to it being included in 17th Edition - along with harmonization work of the respective cable standards which we now call EN 50525.


    You asked about "reports" - they won't exist for this, because there's nothing official. If a lead fails "PAT test" or similar, it's replaced, not reported.


     


  • 0
    AJJewsbury:
    Who would keep such reports - there's not a statutory duty to report such failures.

    If there was no evidence of problems why did JPEL think is necessary to delete the PVC (H05VV-F) option?


       - Andy.




     



    The light-duty 318-Y cable is designed for use in domestic appliances, such as those often found in kitchens and offices, with a voltage rating of 300/500V. It is suitable for use with ordinary duty portable appliances such as radios, table lamps and office equipment where the potential for mechanical stresses and mechanical damage is low.



    The 318-Y range is manufactured in accordance with BS EN 50525-2-11 and European harmonised standard H05VV-F  (often misspelled as HO5VVF). Outside of Europe, the H05VVF cable is often called NYMHY cable.  

    318-Y / H05VV-F Cable | Eland Cables


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    Who would keep such reports - there's not a statutory duty to report such failures.

    If there was no evidence of problems why did JPEL think is necessary to delete the PVC (H05VV-F) option?


       - Andy.
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    i agree that reply is indeed  even less useful than the sort of discussions we get  on here, perhaps there should be  a prize for most evasive 'answer'.

    The real answer is it is perfectly OK to use any old cable so long as it is suitable for the load and environmental conditions - orange arctic is fine for lawnmowers after all...

    M
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    A link to this article just appeared in my email inbox, an example of how to dodge answering a question:

    Voltimum
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    AJJewsbury:
    I think the guidance just hasn't been updated Andy

    I'm sure you're right - but that's what the sector appears to be working to none the less. (Just google for images of caravan hookup leads and see how many are orange (or occasionally blue or yellow) - and just how many are black rubber).


    And are there any reports of any failing due to water ingress?


        - Andy.


    Who would keep such reports - there's not a statutory duty to report such failures.


    Provided the caravan is connected to an outlet that's protected by 30 mA RCD, then I think we can accept the risk is at least partly mitigated by that.


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    Gino,

    Have you identified the type of earthing the property already has ?(TT, TNS TNC_S ) That has to be the first step.

    The only one that means you cannot use the house earth is TNCS. Sadly, it is the most common type in any building after about 1975

    If you are not sure, post a photo of the company fuse holder and where the green and yellow wires go, or decide which of the pictures here match what you have .


    If it does turn out to be TNCS, then to meet the law, the caravan should not connect to the mains suppliers earth, but should be made a  TT island - so L and N from the house supply via a double pole RCD and, the supply earth not used at the socket, but an electrode instead.

    No need for SWA cable, could be twin and earth in conduit, or straight into the the box.

    Mike.
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    and 1.5 mm2.
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    I think the guidance just hasn't been updated Andy

    I'm sure you're right - but that's what the sector appears to be working to none the less. (Just google for images of caravan hookup leads and see how many are orange (or occasionally blue or yellow) - and just how many are black rubber).


    And are there any reports of any failing due to water ingress?


        - Andy.
  • 0
    AJJewsbury:
    I think the issue is more that cable harmonization has progressed, we're no longer using the former British Standards for flexible cables - this change occurred for 17th Edition (16th AMD2 permitted H05VV-F as well as H07RN-F), so it's been in place for over 12 years!

    And completely ignored by the sector for all that time - e.g. the Caravan Club's advise (https://www.caravanclub.co.uk/uk-holidays/useful-information/hooking-up-to-the-mains/) says " harmonised code H07RN-F or H05VV-F or equivalent (BS6007 or 6500) 25 metres maximum (+ or – 2 metres) long of three core cable (live (brown), neutral (blue) and earth (green/yellow)) each core of 2.5mm squared section. " and " We recommended that the cable is coloured orange for visibility in long grass. " - yet have there been any reported problems?


       - Andy.


    I think the guidance just hasn't been updated Andy -both of the quoted standards were withdrawn in 2012.


    Although, I have to point out also that BS 6007 is the standard for "singles" - unsheathed single-core cables - so that would make that part of the guidance plain wrong, wouldn't it?


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