Posting a message to the forum will remove the above advertisement
  1. angel While you're here, would you mind checking out our Electrician's Insurance section to see if we could save you a few quid? - Specifically our Van Insurance Deals and Public Liability Insurance Deals. Thanks for supporting the forum! angel

Discuss Something wrong here ! in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

Thread Status:
Not open for further replies.
Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. Flyingsparks
    Offline

    Flyingsparks Regular EF Member

    Location:
    Derbyshire
    Customer moved into a 4 bed property a couple of months ago and has just had an electricity bill for £500 for one month !

    I was called out to find out what was causing such a large bill, and found out that the immersion heater had been left switched on permanently.

    During my inspection of the electrical installation I discovered this main isolator.

    2012-02-22_09-44-02_437.jpg

    Apart from the obvious 2.5 cable fused off a 100A fuse to feed a sw spur for the local light, my main concern is the 2 SWA cables that have been used as a sub main to feed the house.

    The incoming supply is only single phase but is connected to a 100A service connector and 3 lots of meter tails feed into this switch fuse. The outgoing 3 core SWA cable is then used as a sub main to feed the phase conductor to a 3 phase distribution board in the house.

    A further 2 core SWA has been used to take the neutral and earth conductors to the same distribution board.

    This obviously does not comply with the regulations as these would in effect be classed as single conductors, & eddy currents could be present in both SWA cables !

    Do you think that this could also contribute to the high electricity bills ?
     
  2. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    well the immersion heater would not run up £500 in a month
     
  3. mark1979
    Offline

    mark1979 Regular EF Member

    Location:
    northern ireland
    did you check the roofspace for metal halide fittings?
     
  4. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    and a funny aroma?
     
    • Like Like x 3
  5. Flyingsparks
    Offline

    Flyingsparks Regular EF Member

    Location:
    Derbyshire
    That what I figured, so I started digging deeper.

    They have had another electrician fit downlights in 4 rooms about a month ago, but these only add up to about 1800 W total.

    I did notice that he had installed a three phase RCD on the 3 single phase conductors feeding the distribution board in the house but obviously did not check the sub main !
     
  6. mark1979
    Offline

    mark1979 Regular EF Member

    Location:
    northern ireland
    maybe he had checked out the crop before starting work?
     
    • Like Like x 1
  7. Flyingsparks
    Offline

    Flyingsparks Regular EF Member

    Location:
    Derbyshire
    No unfortunately the only aroma I could smell was the babies nappy :smoking:
     
  8. D80
    Offline

    D80 Guest

    It could easily cost £2-300 a month or so if always on. Without a doubt it's going to be the biggest problem.

    It would be worth getting the clamp meter out and seeing what each circuit is pulling, and also getting everything turned on when doing so.
     
  9. mark1979
    Offline

    mark1979 Regular EF Member

    Location:
    northern ireland
    was it definitely 500 for a month and not a quarter? i had nearly the same thing recently.
     
  10. Flyingsparks
    Offline

    Flyingsparks Regular EF Member

    Location:
    Derbyshire
    The immersion heater is in the bottom of the cylinder in the colder water so it may may be on most of the time.
     
  11. mark1979
    Offline

    mark1979 Regular EF Member

    Location:
    northern ireland
    the immersion would be turning itself off on the stat.
     
    • Like Like x 1
  12. D80
    Offline

    D80 Guest

    NIE/Power NI rates, so more expensive!
    3kw * 17.4p tariff * 24 hours a day * 30 day month
    Gives £376 or thereabouts. If on 24/7 it won't run 24/7 though, it will hit temperature and cut out. Its the main problem though. A lot of other things can contribute on top of it (Washing machines, electric hob/oven Electric Shower, halogen downlights, tumbled dryers....

    Would be well worth clamping each circuit and seeing what pulls what load. Could sell a few GU 10 Led's, an immersion booster switch plus maybe others and save the customer a fortune in the long run.
     
  13. Knobhead
    Offline

    Knobhead Guest

    How are the tails connected in to the meter?
     
  14. mogga
    Offline

    mogga Just me Electrician's Arms

    there have been various theroyes about Immersion heaters leave them on turn them on at specific times arguments were
    leave it on the stat will turn it off when water is hot and assuming tank is foam lagged it will stay hot for a good while only turning on when water is drawn hence only heating water used bar "ticking over" every so often keeping tank hot
    Against time clock When a bath is run FULL tank requires heating due to latent heat ect ect But I doubt £500 would be from immerser as for that switch fuse SOMETHING is wrong you need to find out what goes where and what else is tapped off IE neighbours house ect
     
  15. GT1
    Offline

    GT1 Guest

    How is the house heated..
    Gas or Electric..?
     
Loading...
Similar Threads - Something wrong here Forum Date
Something for ALL diyers to watch DIY Electrical Forum Jan 2, 2018
Shopfitting. . .. am I missing something? Electrical Forum Dec 18, 2017
Thread Status:
Not open for further replies.

Share This Page

Electricians Directory Post a Domestic Job Post a Commercial Job