Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discuss Outbuilding with multiple supply in the Electrical Forum area at ElectrciansForums.co.uk.

Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. captaincaveman
    Offline

    captaincaveman Regular EF Member

    Location:
    manchester
    Hi lovely people.
    Just thinking aloud here wondering if anyone has any points I should consider.
    Been to do a quote on an outbuilding which has had an electrical supply for some time for lights & a couple of sockets. The building is basically a lounge with toilet & utility room.

    The owner wants a shower in there (8kw) and has laid a new 10mm cable along the garden wall from the ccu to the outbuilding just for supplying the shower and now wants it connecting up. The cable enters the outbuilding at the opposite end to the existing supply.

    I need to sit down and plan a design but have never supplied an out building which already has a supply and there's a couple of things I need to look into. Such as being able to isolate both supplies simultaneously. Whether to bond both supplies at the outbuiling side etc, etc...

    Any suggestions or recommendations for me to take into account would be gracefully appreciated.
     
  2. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    I would be asking the customer the reasoning behind the cable they bought ................... is it SWA or T&E?
     
  3. captaincaveman
    Offline

    captaincaveman Regular EF Member

    Location:
    manchester
  4. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    Why would you need to isolate both supplies "simultaneously"?
     
    • Agree Agree x 1
  5. captaincaveman
    Offline

    captaincaveman Regular EF Member

    Location:
    manchester
    I would see it as good practrice. Otherwise DIYer Joe Blogs may isolate one supply to do some maintenance and have a nasty suprise
     
  6. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    Good practice goes out the window when DIY Dave installs the cable!

    Not sure how you can achieve this ................ how does the customer expect you to connect this cable he bought to the supply?
     
  7. Spoon
    Offline

    Spoon Forum Mentor

    Location:
    Lancashire
    Is the water pipe for the shower copper or plastic?
    I presume it's a new circuit? Who will be doing the notification?
     
  8. Leesparkykent
    Offline

    Leesparkykent Super Moderator Staff Member Super Moderator

    Location:
    Kent
    Could be
    Done with a contactor and the coil fed from the Board in the outbuilding. When you knock the main switch off it cuts the power to the coil and disconnects the supply to the shower.
     
  9. wirepuller
    Offline

    wirepuller Forum Mentor

    Location:
    south uk
    It wont be 'multiple supplies', it'll be two circuits from a single source of supply. Just label and identify distribution equipment accordingly.
     
    • Agree Agree x 6
  10. spinlondon
    Offline

    spinlondon Forum Mentor

    Location:
    Harlow Essex
    Yes, I would not be concerned about linking the two isolators.
    I imagine you would be using an up front RCD for the shower anyway?
     
  11. willy fixit
    Offline

    willy fixit Regular EF Member

    Location:
    Exeter - a glorious place to live!
    Business Name:
    Mike Willmott
    What is the earth arrangement? - It should be TT at the outbuilding.
    Could you use the 10mm for everything and disconnect the old supply?
     
    • Agree Agree x 1
  12. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    I was thinking that as well willy but without eyes on the install, it would be a tall order to come to a safe decision on that, but yes it is a good idea.
     
    • Like Like x 1
  13. telectrix
    Online

    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    just what i was thinking.
     
  14. wirepuller
    Offline

    wirepuller Forum Mentor

    Location:
    south uk
    Why should it be TT at the outbuilding?
     
    • Agree Agree x 3
  15. willy fixit
    Offline

    willy fixit Regular EF Member

    Location:
    Exeter - a glorious place to live!
    Business Name:
    Mike Willmott
    Fair comment WP I should've worded it as below.

    What is the earth arrangement? - Should it be TT at the outbuilding?
    Could you use the 10mm for everything and disconnect the old supply?

    I think I would put a rod in to bond the water supply (If it's extraneous) - I guess it depends on how easy it is to run a bond to the MET.
     

    Attached Files:

    • Like Like x 1
Loading...
Similar Threads - Outbuilding multiple supply Forum Date
Multiple TT outbuildings Electrical Wiring, Theories and Regulations Oct 17, 2018
Electric shower in outbuilding 55m from consumer unit Electrical Forum Nov 27, 2018

Share This Page

Users found this page by searching for:

  1. coiled earth bond good idea

Electricians Directory Post a Domestic Job Post a Commercial Job