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Minimum Number of Circuits Competition in a Domestic Dwelling.

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I am starting a competition for all forum members as to the least number of final circuits found supplying a domestic residential installation.


Yesterday I worked in a bungalow that has three final circuits at the consumer unit supplying the whole domestic bungalow.


1. Lighting.


2. Sockets.


3. Shower.


The lighting circuit supplied the whole building.


The sockets were supplied by a B32 M.C.B. and comprised two ring finals circuits bunched together. (Which I later separated).


The shower might have been the old cooker circuit as the bungalow had no cooker circuit. It had a gas cooker.


So who can beat that?


Z.
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    Last year I worked in a bungalow where an electrician had just installed a sixteen way CU in a bungalow that originally would have had a three way board.


    Andy
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    Of course the winning answer has to be zero (https://www.bbc.co.uk/news/uk-northern-ireland-48202236) but I think that is probably not the intent of this competition.

    Alasdair
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    Alasdair Anderson:

    Of course the winning answer has to be zero (https://www.bbc.co.uk/news/uk-northern-ireland-48202236) but I think that is probably not the intent of this competition.

    Alasdair




    Hello Alasdair,

                           the judges seem to be a long time discussing the wind-up radio.


    Z.

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    Sparkingchip:

    Last year I worked in a bungalow where an electrician had just installed a sixteen way CU in a bungalow that originally would have had a three way board.


    Andy 




    No, no Andy. We are looking for a smaller number not a larger one. Now please concentrate or I'll have to send you to the headmaster. And put that away.


    Z.

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    Zoomup:



    Hello Alasdair,

                           the judges seem to be a long time discussing the wind-up radio.



    The question was final circuits and the wind-up radio is only a consumer - maybe it counts as half a final circuit.....

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    Alasdair Anderson:




    Zoomup:



    Hello Alasdair,

                           the judges seem to be a long time discussing the wind-up radio.



    The question was final circuits and the wind-up radio is only a consumer - maybe it counts as half a final circuit.....


     




    You seem to be much too bright for this class Alasdair, I think that we will put you up to Mr. Stern's class next year. Wind-up radios, consumers indeed. What ever next. And where's last week's homework? Has anybody got any sensible answers here? And just to think that I could have been a vet.


    Z.

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    Zoomup:




    Sparkingchip:

    Last year I worked in a bungalow where an electrician had just installed a sixteen way CU in a bungalow that originally would have had a three way board.


    Andy 




    No, no Andy. We are looking for a smaller number not a larger one. Now please concentrate or I'll have to send you to the headmaster. And put that away.


    Z.


     




    Ah!


    The three circuits did many years service, having installed a sixteen way board to serve the same purpose there was mention of arc fault devices and I pointed out that as it stands at the moment that would mean fitting a thirty two way board to do what the the original three way board did at a cost of several thousand pounds.


    We know you like YouTube videos, have a look at a Wylex AFD promotional video  the thought seems to be that four circuits are adequate for an installation and make the consumer unit less than nine hundred quid to buy, so perhaps four circuits is it what is actually needed, but I’m sure that in most cases we can get it down to three and maybe even two.


    Andy 


     

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    Zoomup:




    Alasdair Anderson:




    Zoomup:



    Hello Alasdair,

                           the judges seem to be a long time discussing the wind-up radio.



    The question was final circuits and the wind-up radio is only a consumer - maybe it counts as half a final circuit.....


     




    You seem to be much too bright for this class Alasdair, I think that we will put you up to Mr. Stern's class next year. Wind-up radios, consumers indeed. What ever next. And where's last week's homework? Has anybody got any sensible answers here? And just to think that I could have been a vet.


    Z.


     




    Hello Andy,

                        the most important thing about the Wylex video which you kindly linked to is this:


    Why is the dad at the beginning of the video still bottle feeding his boy? The boy is old enough to drink from a cup.


    Also, why is the lazy man's way of terminating the c.p.c.s used in the new Wylex consumer unit, I always double over the ends to ensure a good termination. If installed singly the copper conductors can be loosened with movement and be unreliable. 


    If the new devices automatically switch off, we are not really sure why. With separate devices fault finding is easier as the device often indicates the type of fault. Or do these devices have an L.E.D. flash code as to the type of fault that has caused them to turn off? Imagine getting the customer to explain this over the phone. These days if an R.C.D. trips off we can talk the customer through the initial fault finding/rectification process over the phone. This often prevents a long journey, and then when we get there the customer says: "Oh, it's alright now we found the problem....didn't Tom contact you?"


    When the price drops by 80 per cent I might be tempted.


    With single multi-protection devices, if one aspect of them fails, the whole device has to be renewed. Hardly green is it?


    Z.








     

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    I did one with only a single 230 volt circuit, a 32 amp ring final.

    And one 12 volt circuit, a 10 amp radial for lighting.

    No mains electricity supply. The 32 amp circuit was equipped with a 32 amp Ceeform inlet for connection of a generator. The 12 volt circuit was terminated in a pair of battery clamps. Tenant to supply generator and 12 volt battery.
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    My house had a 15a radial for sockets, and a 5a for lights.


    built in 1958

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