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Discuss Running SWA underground in the Solar PV Forum area at ElectrciansForums.co.uk.

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  1. synergy power
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    synergy power Guest

    I'm running about 20m of 6mm SWA underground, does anyone have the regulations for doing this?
     
  2. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    18" deep, surround with sand, warning tape at 12" deep, cable suitable considering load and volt drop, better in ducting if possible.
     
  3. i=p/u
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    i=p/u Trusted Advisor

    ansd attatch a drawing of cable route for future refrence is all i cvan add
     
  4. yellowvanman
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    yellowvanman Electrician's Arms

    Location:
    Dorset
    Here we go again!

    Regs doesn't specify a minimum depth except on farms, in caravan sites and marinas! Its a depth you think is suitable to prevent damage.
     
  5. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    cheshire/staffordshire
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    Telectrix
    was thinking of worst scenario, without details of the exact circumstances. obviously, in certain situations, the depth can be less.
     
  6. i=p/u
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    i=p/u Trusted Advisor

    electricians guide to building regs say at least 500mm
     
  7. synergy power
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    synergy power Guest

    Cable route is under a footpath and garden, No heavy use going on above... I was just going to lay the cable about 10-15 inches deep and then lay electrical cable tape above?
     
  8. i=p/u
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    i=p/u Trusted Advisor

    at about 6 inches below surface for tape and your flying
     
  9. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    N

    under garden.how deep is a spade thrust? i would go with at least 15" with tape at 10" ( thereabouts.). make sure cable is bedded on sand with sand on top, at least 4" top and bottom. you don't want nasty sharp stones piercing the sheath, do you?
     
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  10. Guest112
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    Guest112 Guest

    teles right definately use sand under and over the cable and the tape of course
     
  11. needasparks
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    needasparks Electrician's Arms

    Location:
    Essex
    Ask the sparks whos making it off would be best. If its underground is outside, if its a new supply also both need registering unless of course this is not from a domestic supply.
     
  12. SPARTYKUS
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    SPARTYKUS Trusted Advisor

    Location:
    Shropshire
    Not sure but i think "double digging" (two spades' depth) is an important consideration in gardens.
     
  13. Earthstore
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    Earthstore Guest

    Have you ever hit a cable that some lazy sod has not burried deep enough, because I have..
    It was in a garden, and I hit it with a fork, fortunatly I knew what I had hit, but someone else might not have been so lucky.
    Oh and the lazy sod was the MEB, and they wanted to charge me for the repair...
    It just so happened that my brother worked for the SEB, and he told me what I should do about it.
    It does not matter where it is, just bury the thing deep enough...
     
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    Last edited by a moderator: Feb 19, 2012
  14. johnboy6083
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    johnboy6083 Band Member Trusted Advisor

    Location:
    South east
    Dont forget to derate the cable too. 0.9 rings a bell, but check chapter 6 of the red OSG (don't know the green one yet)
     
  15. supasparxs
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    supasparxs Electrician's Arms

    Location:
    Leigh, Lancashire
    Telectrixs has never been very good at measuring,
    you should see what he says 6" is!!

    :)
     
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