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Discuss which type of isolator as back up for tails over 3metres? in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Aaron Roberts
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    Aaron Roberts Guest

    I'm changing my old rewirable cu for a new dual rcd board and must also replace the old isolator located away from the cu. It's next to the meter which is over 3 metres away in the front porch.

    Which type of isolator should I use and how should it be fitted e.g. in an ip rated enclosure using blind grommets with slits in. Is this method in breach of the regs ip4x?

    Please help :)
     
  2. thw1965
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    thw1965 Guest

    well if its in a covered waterproof porch it wont require a waterproof enclosure. Any double pole isolator with the appropriate ampage rating, they are normally 80 or100 amps will do.
     
  3. Knobhead
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    Knobhead Guest

    HaHa now go walking the trolls
     
  4. rich.250
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    rich.250 Electrician's Arms

    Location:
    Cornwall
    Business Name:
    Rich Williams Electrical
    It will need to be an over current protective device, not isolator. As you are 'fusing down' to protect the tails.
    I'd suggest a switched fuse unit
     
  5. rich.250
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    rich.250 Electrician's Arms

    Location:
    Cornwall
    Business Name:
    Rich Williams Electrical
    Also IP4X is only for a readily accessible top surface, The rest you need to achieve IP2X.
    And additional protection for tails if buried in a wall, by rcd or other means.
    Hope this helps
     
  6. WPD Lad
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    WPD Lad Guest

    Sounds like you'll need a KMF depending on the route of the tails
     
  7. High Tower
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    High Tower Trusted Advisor

    Location:
    Birmingham
    kmf or if your feeling flush, a wylex 110/M switch fuse
     
  8. Engineer54
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    Engineer54 Guest

    An isolator won't cut it i'm afraid, it needs to be an appropriately rated switch fuse.
     
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  9. Richard
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    Richard Electrician's Arms

    Always used a KMF in this situation. Rich
     
  10. GLENNSPARK
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    GLENNSPARK Electrician's Arms

    Location:
    west yorks.
    firstly ...you need to be sure that the new position for the C/U is OK.....that is to say that the C/U and anything alse asocciated with this install (earthing....bonding ...both main and supplementary) etc is up to the latest edition of BS7671...before undertaking ANY WORK HERE...............
     
  11. GLENNSPARK
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    GLENNSPARK Electrician's Arms

    Location:
    west yorks.
    and to make sure that theres no external influeses (mutual detrimental influenses)such as hot pipework.....band 2`s..or any other sillyness like that................
     
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