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Nail down a floorboard -bang, lights out

Discussion in 'DIY Disasters' started by NorthantsPete, 28 Nov 2016.

  1. NorthantsPete

    NorthantsPete

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    So I thought id nail down a floorboard that was squeeking as one final job of the day. BANG the lights go out - ive hit a mains cable.

    As the hole is in the center of the joist i have a thread going to work out how to repair, the cable was tight, no slack for a junction box either side.

    Got a 300v wago holding it in place atm over the top of the joist but need a long term fix and going to be inaccessible
     

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  3. PrenticeBoyofDerry

    PrenticeBoyofDerry

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    Oh dear, nailing down the centre of a floorboard is not something that would be recommended.
    The cables should really be capped off or holed at a depth of at least 50mm from floorboard/ceiling board.

    So the repair would require a length of twin and earth cable (ideally rated at the same as the existing cable, likely 1.0mm2 or 1.5mm2), so you can join either side of the joist (if you have no slack, to bring the joint past the joist.

    The you need a couple of maintenance free (MF) junction boxes. j804s or j803s can be used.
    You will also need some earth sleeving for bare earth core/CPC.

    Cut the existing cable back at both sides of joist, feed the extra length of twin/earth through joist and join the cables together via MF junction boxes.
    The cables insulation needs making off to expose about 12mm of conductor for the MF terminals to grab. It would be wise to test for continuity once the repair is made.

    https://www.google.co.uk/webhp?sour...install+a+hager+maintenance+free+junction+box

    There is a guide PDF file on the MF junction boxes
     
  4. Chud

    Chud

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  5. PrenticeBoyofDerry

    PrenticeBoyofDerry

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    Could you instruct the OP, which Wagos are classified as MF, because not all are!!!!!!!!

    The link states they meet BS7671:2008??? That could mean anything but not everything within that standard. It does not state that they meet the requirements of BS EN 60670-22 or BS5733.
     
    Last edited: 30 Nov 2016
  6. Chud

    Chud

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    Iirc it's in the instructions that are supplied with that wagobox.

    This is from memory (used once previously) but it specifies what connectors must be used, cable grip spacing and needs to be locked by a cable tie in a specific location. It's pretty clearly worded.
     
    Last edited: 30 Nov 2016
  7. Seafarer1966

    Seafarer1966

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    What abeyt yee wee looorrd? Chill out mate. The use of exclamation marks is considered aggressive. Eight exclamation marks at the end of your sentence is downright unnecessary.
     
  8. PrenticeBoyofDerry

    PrenticeBoyofDerry

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    Not aggressive or unnecessary, purely making a point, due to information given was lacking quality.
    The WAGO boxes are not classified as MF or marked as so, nor do WAGO claim they are(!)
    The enclosures come under a different standard.
    And I believe only two types of the connectors have reached the standard required by BS5377.
    So before someone starts locating joints in inaccessible places, with non-compliant products, I thought best I make that point.
    If you have no constructive information to offer the topic, I suggest in a non aggressive manner or grammar, you but-out!
     
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  10. Chud

    Chud

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    From the instruction leaflet https://www.connexbox.com/assets/index/download/id/44/:

    My suggestion was marked as IIRC, so not handed down as fact. It was based on the OP already having some familiarity with Wago connectors - (and that they can use google/read instructions) as such they may already have the required connectors for MF (773 and 222 series) and may just need to buy a couple of the appropriate boxes for about £3 rather than spend £20+ on a couple of the hager MF boxes (good as they are).

    Considering the board is currently up and the cable is jointed over the top of the joist even a temporary repair using a pair of old fashioned JB's would probably be an improvement at this point so the board can at least be laid down for the time being?
     
  11. PrenticeBoyofDerry

    PrenticeBoyofDerry

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    A fine and informative reply/post.
     
  12. Seafarer1966

    Seafarer1966

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    Like I said me bowler hat and orange sash wearing chum......aggressive.

    The Boy from Derry stands in front of the wardrobe mirror daubed in camo paint with his headband on, teeth clenched and holding a badminton racquet (pretending it's an M60)...."don't push me"....

    I'd could pick you off a shelf......I could so I could.

    I'm not even a catholic but I'll be one just for you love.
     
  13. PrenticeBoyofDerry

    PrenticeBoyofDerry

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  14. Seafarer1966

    Seafarer1966

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    So sure l'm an Ulster Orangeman, from Erin's isle I came,
    To see my British brethren all of honour and of fame,
    And to tell them of my forefathers who fought in days of yore,
    That I might have the right to wear, the sash my father wore!

    Chorus:
    It is old but it is beautiful, and its colours they are fine
    It was worn at Derry, Aughrim, Enniskillen and the Boyne.
    My father wore it as a youth in bygone days of yore,
    And on the Twelfth I love to wear the sash my father wore.

    Chorus

    For those brave men who crossed the Boyne have not fought or died in vain
    Our Unity, Religion, Laws, and Freedom to maintain,
    If the call should come we'll follow the drum, and cross that river once more
    That tomorrow's Ulsterman may wear the sash my father wore!

    Chorus

    And when some day, across the sea to Antrim's shore you come,
    We'll welcome you in royal style, to the sound of flute and drum
    And Ulster's hills shall echo still, from Rathlin to Dromore
    As we sing again the loyal strain of the sash my father wore!
     
  15. PrenticeBoyofDerry

    PrenticeBoyofDerry

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