adding 3 sockets from an existing socket

Discussion in 'Electricians' Talk' started by darren yarnold, Aug 16, 2018.

  1. darren yarnold

    darren yarnold New Member

    hi all,

    i am looking to add 3 double sockets in to loft space as currently going through a conversion, what would be the best way to wire these in from an existing socket in the below bedroom.?

    thanks in advance
     
  2. rogerk101

    rogerk101 Screwfix Select

    Two options:
    1. Create a 13A fused spur from the ring that feeds the bedroom sockets, and hang the three double sockets in the loft from that.
    2. Break into the ring that feeds the bedroom sockets and add the three loft sockets into that ring.
    The former is not notifiable, but the latter is notifiable.
     
  3. peter palmer

    peter palmer Screwfix Select

    Don't think either way is notifiable, only new circuits need notifying via the scam providers. You can extend ground floor and upstairs rings and lighting circuits for a new 3 bed extension and also possibly a new bathroom without having to sign anything off but you can't wire a single socket right next to the mains unit if its on its own MCB. So sleep easy tonight knowing the people that make out laws know what they are doing.
     
  4. seneca

    seneca Screwfix Select

    Neither is notifiable, you're just extending an existing circuit whichever way you do it.
     
    stuartibstock likes this.
  5. Sparkielev

    Sparkielev Screwfix Select

    Not notifiable, but should test the circuits it may look like a ring but it not be
     
  6. MGW

    MGW Screwfix Select

    Forget if noticeable or not, the problem is testing, to extend a ring final the first you need to get the loop impedance of original circuit to be able to calculate if the loop impedance of the new circuit will take it out of the limits set for volt drop and automatic disconnection in the case of a fault.

    In the main the line - neutral loop impedance or prospective short circuit current is not recorded for indevual circuits, so you need to measure, there are two meters that can do this, the loop impedance meter and the low ohm meter latter must use 200 mA so not a simple multimeter.

    However the loop impedance required for a 13A spur is very different to that required for a ring final, so if the person doing the work has not got the meters required then the risk of going out of spec is far lower with a 13A spur than with an extension to the ring final.

    Ok no circuit should be modified without testing, but to try and tell DIY people they should not do the work themselves we know will fall on deaf ears, so pointing to use a FCU and fused spur is likely the best option, and if not already RCD protected then a RCD FCU can be used.

    It's not regulations or law, but doing a safe job.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice