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  1. Ohmslaw
    Offline

    Ohmslaw New EF Member

    Location:
    Cheshire
    I recently had the house (3 bed semi) rewired and have come across some things that are causing me concern. I’ve made the Electricuan aware but have not yet had a proper response so I just want to get some alternative “expert” opinion.

    Basically three issues.
    1. The upstairs and downstairs sockets are now fed by an MCB, Type B rated 16A. I’m of the opinion these are probably too small and should be at least 20 if not 32A? For info we have 16 x 13A sockets downstairs alone. The reason ( I think) for it being 16A is explained below.
    2. Downstairs, instead of rewiring a 60 year old property as a ring main, the Electrician has connected the sockets as radial spurs and fed them with 2.5mm cables from the ceiling void. Hence, I think, the reason why the breaker is only 16A? I don’t know why they were not run as a ring but shouldn’t the cable be at least 4mm, thus allowing a biggger MCB?
    3. There was a single 13A socket which we had an extension block connected too, feeding tv, sky box, dvd etc. I wanted this changing to 4 new sockets (two doubles) to get rid of the extension block. The Electrician has also wired this as a spur and a spur off a spur, all run again in 2.5mm.

    What are your thoughts on this and what would be your advice?
     
  2. westward10
    Offline

    westward10 In echoed steps I walk across an empty dream. Staff Member Trusted Advisor

    Location:
    Northamptonshire
    Was the power at your property totally rewired in other words all existing circuits removed with all new cabling fitted or are they alterations to the existing system.
     
  3. Andy5678
    Offline

    Andy5678 Electrician's Arms

    Location:
    Scotland
    How long have you been waiting for a response from your electrician?

    Have you been issued with a certificate for the works?

    16a radials in 2.5 are ok. But your electrician designed it so prob best he answers your questions to begin with.
     
    • Agree Agree x 2
  4. Pete999
    Offline

    Pete999 Trusted Advisor

    Location:
    Northampton
    Business Name:
    None
    Ask your Electrician if he has designed and installed the sockets in accordance with Appendix 15 BS7671?
    Has he given you an EIC Electrical Installation Certificate for the new circuits he installed, and an Minor New Works Certificate for any circuits that have just been altered ?
    Have you Paid him yet?
     
    • Like Like x 1
    • Optimistic Optimistic x 1
  5. Spoon
    Offline

    Spoon Trusted Advisor

    Location:
    Lancashire
    When the electrician did you a quote for the work, what was stated on the quote regarding the 16A?
     
  6. Ohmslaw
    Offline

    Ohmslaw New EF Member

    Location:
    Cheshire
    A bit of both. By this I mean the job was set as a complete Rewire but parts of the electrical wiring had had previously (in the past) been added or renewed. Where this was the case the Electrician said he checked the integrity and if it was sound he left it in place. I’d say 80% was rewired.
     
  7. Wilko
    Offline

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Hello and Welcome to the Forum- what a great name :) .
    Yes 2.5mm2 conductors can normally support 20A loads at least. As the current carrying capacity is limited by heat dissipation it's often insulation in cavity walls and ceilings which causes design issues and may be why 16A MCB has been used in this case.
     
  8. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    What did the original quote say?
     
    • Like Like x 1
  9. Ohmslaw
    Offline

    Ohmslaw New EF Member

    Location:
    Cheshire
     
  10. westward10
    Offline

    westward10 In echoed steps I walk across an empty dream. Staff Member Trusted Advisor

    Location:
    Northamptonshire
    Can you be certain the circuits you quote in #1 have been completely rewired or are alterations to existing circuits left in place.
     
  11. Andy5678
    Offline

    Andy5678 Electrician's Arms

    Location:
    Scotland
    It’s a bit late to complain about the design of the circuit now it has been done. Should have been discussed at the design stage and put in writing if you wanted to be particular about it.

    What is your knowledge on bs7671 and how did you come the conclusion that your not happy with the final design.

    The electrician could have done a good job for all we no.
     
    • Like Like x 1
    • Agree Agree x 1
  12. Spoon
    Offline

    Spoon Trusted Advisor

    Location:
    Lancashire
    So what was stated on the quote?
     
    • Optimistic Optimistic x 1
  13. n180
    Offline

    n180 Active EF Member

    16A on 2.5mm is usually fine.

    But if you've had all your upstairs and downstairs rooms on one radial, then that's just really poor design (even though it may technically be fine according to regs). Not sure what you discussed or what your contract with electrician was but I would'nt settle for one radial feeding most of the property.
     
    • Agree Agree x 2
  14. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    Any chance you could post a picture of the fuseboard?

    AND for the benefit of any home owners perusing this thread, I would recommend you get several written quotes for this type of work ...
     
    • Like Like x 2
    • Agree Agree x 2
  15. Strima
    Offline

    Strima Electrician's Arms

    Location:
    St Neots
    Kitchen appliances aside, would a standard domestic radial circuit get anywhere near 16 amps?
     
    • Agree Agree x 2
    • Like Like x 1
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