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Discuss Blown dimmer in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. baggy61
    Offline

    baggy61 Guest

    Hi guys,
    New to this posting lark (not good at typing either) but to get up & running I got called to a house a few weeks ago, the dimmer on a cieling candalabra had blown. replaced it with 2g alto 250w dimmer . Got call today to say lamp in mathing wall light had gone,they replaced it but now that dimmer switch had stopped working I put a meter across terms & got 19v. (240 to earth).
    I replaced the switch again and it works fine. The lady mentioned that she had previously replaced the switch.Installation looks about 50 years old , signs of diy(checked tightness of terms in c.u & cooker earth hanging loose) I'm going back soon for EICR but would appreciate any ideas (voltage spikes ) perhaps.
    Its a TT system,retro fit mcbs & 30Ma rcd on incomings.
    Thanks in advance,
    Martin.
     
  2. telectrix
    Offline

    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    a light bulb ( sod off lamp fanatics ) blowing sometimes will take a dimmer out with it.
     
    • Like Like x 3
  3. baggy61
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    baggy61 Guest

    Thanks Telectrics, do you think its possible three times ?
     
  4. John Toomey
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    John Toomey Guest

    What type of lamp is it?

    - - - Updated - - -

    What type of lamp is it?

    - - - Updated - - -

    What type of lamp is it?

    - - - Updated - - -

    What type of lamp is it?
     
  5. Toonlad
    Offline

    Toonlad Electrician's Arms

    Location:
    Newcastle
    Parrot..... you must be getting some internet lag
     
    • Like Like x 1
  6. SPARTYKUS
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    SPARTYKUS Electrician's Arms

    Location:
    Shropshire

    What makes you say that?
     
  7. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    How many lamp bulbs in the fitting and of what rating?
     
    • Like Like x 2
  8. baggy61
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    baggy61 Guest

    Ceiling candalabra has 3x candle gls 40 or 60w then 3wall lights with 2 of the same on each.
     
  9. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    In which case I suspect the dimmer gave up the ghost. you need a dimmer with a greater capacity and maybe a deeper back box!
     
  10. SPARTYKUS
    Offline

    SPARTYKUS Electrician's Arms

    Location:
    Shropshire

    Today replaced a dimmer module - fed two lights that took a standard security light lamp (or bulb). Both had a 150w lamp in for ...well, 4 years since I put them there.

    dimmer module rated at 400w.

    blew lamp. Owner replaced lamp. Mcb tripped. Light doesnt work.

    replaced dimmer module. Didnt check lamps (!).

    Week later mcb trips again. Hmmm. Ask owner to check what is written on two lamps that they have replaced. One says 150w, one says 500w!

    :)
     
  11. baggy61
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    baggy61 Guest

    Surely only 120 or 180 w on candalabra though 240 or 360 on wall lights. Back box has a spacer , but good point , thanks, I'll check what lamps are in there tomorrow. Seem to be looking for dimmers that work on tiny loads for LEDs probably overlooked the obvious. D 'oh.
     
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  12. ipf
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    ipf Forum Mentor

    Good at sums then, eh
     
    • Like Like x 1
  13. baggy61
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    baggy61 Guest

    12 fingers 12 toes simples:wink5:
     
    • Like Like x 1
  14. John Toomey
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    John Toomey Guest

    Its them evil candle lamps!! especially if they are mounted vertically. Sometimes when they blow the element falls across the support wires, cheap or even good quality lamps never blow their internal fuse quick enough so the short circuit current blows the dimmer first. I had a couple of chandeliers in a night club pulling a lot less than the dimmer ratings but was changing the dimmer modules, alto newlec or sector, even hamilton on a regular basis. In the end I fitted Lutron dimmers which have internal overloads which reset after such a occurance. Problem solved! They are around £60 tho, but for my customer with my extortionate hourly rate :) it was the best option. Spacer required tho!!
     
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  15. John Toomey
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    John Toomey Guest

    Lamps glow bulbs grow, as they used to say at the East Midlands Electricity Board Concentration Camp!
     
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