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Lighting Problem.

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In my living room I have three lighting points. One is a centre ceiling point that had  a 100 Watt G.L.S. incandescent lamp.


Then there is a wall light where the bulb has blown but I have not renewed it as it is difficult to access.


And lastly there is another wall light where the 40 Watt G.L.S. incandescent lamp was working.


Last night the centre light and one wall light were working fine through the non-L.E.D.compatible dimmer switch.


This morning it was a bit gloomy so I turned on the dimmer switch and the B6 M.C.B. tripped off in the consumer unit. 


An ideal opportunity to change the dimmer switch for a new L.E.D. compatible type I thought. So I changed the dimmer, reset the B6 M.C.B. to on and discovered that I had no lights at all.


Why?


Z.


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    Failing neutral connection which has finally blown altogether?
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    You hadn't tightened the switched live correctly and it fell out when you pushed the dimmer back?
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    Grumpy:

    You hadn't tightened the switched live correctly and it fell out when you pushed the dimmer back?


    No Grumpy. all connection were good. I applied the tug test.


    Z.


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    whjohnson:

    Failing neutral connection which has finally blown altogether?




    A good suggestion, but no the neutral was good.


    Z.


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    Polarity messed up at the ceiling rose?
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    you have not told us why the B6 blew out to begin with - presumably the dimmer was collateral, not the original fault that tripped, and that has yet to be identified. Maybe a short at the lampholder, and the dimmer acted as a fuse, so the rest of the house stayed on..
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    I would be looking at the already blown, difficult to access lamp.

    This thread has zoomy's replies to the replies before the replies for some reason
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    Ah, I had the "post date" arrow the wrong way up. Takes a bit of getting used to the new forum
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    Reply. The problem was a simple one that threw me to start off with. BOTH tungsten bulbs had blown at the same time for some reason. When I replaced the bulbs (lamps) with new L.E.D. lamps everything worked normally. Always expect the unexpected.


    Z.
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    Zoomup:

     Reply. The problem was a simple one that threw me to start off with. BOTH tungsten bulbs had blown at the same time for some reason. When I replaced the bulbs (lamps) with new L.E.D. lamps everything worked normally. Always expect the unexpected.


    Wind back the clock a few years and I was en route to my chum for a night rally. He had taken the (pre-war) car out of the garage to get it warmed up and so on. All the lamps had ceased functioning.


    By the time that my chum phoned I was only 15 minutes away so I said that I would meet him as planned.


    He is an engineer (now retired).


    He rejected the possibility that all the lamps had blown. Eventually I persuaded him to test them. Every filament (side, tail and head-lights) had blown. And the fuel pump. And the dynamo.


    We never did make it to that year's rally, but we did by and large fix the problem.


    For those who are wondering, I think that he accidentally knocked off the battery isolator, which allowed the volts to reach a dangerous level.


    Back to Zoomy's problem. The MCB tripped, but did both filaments blow at the same time? If so, why?


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