Sockets in Garage....

Discussion in 'Electricians' Talk' started by MrE, Aug 9, 2019.

  1. MrE

    MrE New Member

    Got blown to bits, but curiosity got the better of me, here's inside the no2 image and also inside the garage
    Sorry I don't know why the images are 90 degrees, they aren't on my Mac.

    IMG_5869.JPG

    IMG_5865.JPG
     
  2. Tony Goddard

    Tony Goddard Active Member

    Still my favourite wiring system, and as bazza says we all learned conduit bending back in the day, how to make set bends, how to work out the length of the radius so it all lined up perfectly without trimming, a dying artform!, good conduit work, like good pyro work is in my eyes a thing of beauty
     
    andyscotland and Bazza like this.
  3. Bazza

    Bazza Well-Known Member

    Yes, looks like 2.5mm2 twin & earth cable run in conduit.

    The second box looks like plastic not steel.
     
  4. Tony Goddard

    Tony Goddard Active Member

    OK so its steel conduit with T&E in, presuming the metal box you show is the house end. The steel conduit passes out the back of the box into the house. The white box in the garage has a different colour cable in, so there must be a join, maybe in the box on the outside of the garage. not a problem if its a well made joint and the box has a gasket.
     
  5. Tony Goddard

    Tony Goddard Active Member

    Bazza, is it me or is it white T&E in the metal box and grey in the plastic one, or is it just a trick of the light?
     
  6. MrE

    MrE New Member

    Ill check tomorrow, but you right one is white, one is grey. The plastic one is in the garage. the metal one is on the house. The CU is about 4m or 5m away from the outside wall. I think it's 2.5mm too, and that right for 16Amp isn't it?
     
  7. andyscotland

    andyscotland Active Member

    I remember all that, and fabricating all the different types of bends and junctions from straight sections of steel trunking. Was hugely satisfying to get it neat, tho even then the lecturer was telling us it was one of those things we had to do for the test then never again.
     
  8. andyscotland

    andyscotland Active Member

    That's slightly curious. The conduit disappears into the ground between the two? There shouldn't really be a joint in the cable other than in an accessible box.
     
  9. MrE

    MrE New Member

    I temporarily used a screw from the inside box, for the missing one on the outside box. but i was amazed there was no gasket between the lid and the little round access trap (in my pics) no waterproofing except metal contacting metal.
     
  10. Tony Goddard

    Tony Goddard Active Member

    My bet is that there is a join in the box on the outer wall of the garage
     
  11. Tony Goddard

    Tony Goddard Active Member

    You can buy rubber gaskets from any electrical wholesaler, and brass M4 screws for the lid
     
  12. Tony Goddard

    Tony Goddard Active Member

    I'm lucky enough to do it most days still being mainly industrial, my garage is done in galvanised 50x50 trunking all round with 20mm conduit drops to sockets and switches and a canalis busbar running up the middle of the roof to feed the lights - very much overkill, but all done with offcuts and overstock from jobs.
     
    andyscotland likes this.
  13. MrE

    MrE New Member

    Yes the metal conduit goes under a concrete path (path was clearly broken up for it to be laid at some point). Path is about 800mm wide, basically access to garden.
     
  14. Tony Goddard

    Tony Goddard Active Member

    99% certain you will find a join in the box outside the garage
     
  15. ajohn

    ajohn Well-Known Member

    I suspect the sparks will tell you that an new cable could be pulled through and what size if needed.

    May be wrong as I would need to look but isn't 2.5mm ok for a 20A mcb ? The ratings of the rcd's might say otherwise though.

    John
    -
     
  16. MrE

    MrE New Member

    I will open that up tomorrow and have a look, but im sure you are right

    I really appreciate all the effort everyone has taken to chip in on this topic.

    Still would like to check, i do need to get this signed off (part P?) when I've added two sockets?
     
  17. Tony Goddard

    Tony Goddard Active Member

    It's 2.5 without a doubt, and that is fine on either a 16 or 20A MCB at this length, no need for a new cable, just to ensure that:

    The joint is OK

    The conduit is earthed

    Gaskets are fitted to the boxes
     
  18. Tony Goddard

    Tony Goddard Active Member

    No, that is a very minor work, you are not adding a new circuit or making a huge alteration, so it's certainly within the scope of DIY work the likes of which go on every weekend up and down the country. Saying that it would be good to get the earthing checked by an electrician who will have a tester for that job, they may well certify it for you as part of that testing depending on what you ask them for, many electricians, including me will not certify someone elses work for obvious insurance reasons, I would do it as a limited EICR on a single circuit at the request of the client.
     
  19. Bazza

    Bazza Well-Known Member

    It’s fine as it is. What do the “ratings of the RCDs” have to do with anything??
     
  20. spinlondon

    spinlondon Well-Known Member

    Could have an RCD rated at 10A I suppose?
    Think the lowest I’ve seen in use is 40A.
    I think it’s a grey cable in both pictures, just the light reflecting off the cable in the first picture makes it look white.
     

Share This Page