lighting circuit

Discussion in 'Electricians' Talk' started by firsttimebuyer, Sep 25, 2016.

  1. firsttimebuyer

    firsttimebuyer New Member

    20160925_101809.jpg Hi all. Under a building notice I am about to wire a new kitchen/dining room. I am an industrial electrician by trade but do not have a mass of experience with domestic lighting. Could somebody please take a look at the following diagram and let me know if it all looks okay and similar the usual way that a domestic installer would set it out . Or can it be made simpler.
    Many thanks
     
  2. Bazza

    Bazza Screwfix Select

    I'm not concentrating too much this morning (!) but two quick overview points:

    1. You should NEVER have the smoke alarms on a switch like that. Anybody could turn it off. They should be wired straight off the lighting circuit. Unless you want to put a keyed switch in there.
    2. The other sswitches, are they supposed to be working as 2-way switches? If so, for which lights? They wont work as 2-way as far as I can see from your diagram.

    PS 1mm will be big enough, assuming your light MCB is 6A.
     
  3. firsttimebuyer

    firsttimebuyer New Member

    Thanks for the quick response. The smoke detectors are fed from permanent live side of the switch so can't be switched off. The top "rose" is supplying main unswitchd feed to the fist 2 gang switch which is carried over to the 3 gang switch then onto the smoke detector. Maybe I've missed something i will look again.
    Thanks.
     
  4. JP.

    JP. Screwfix Select

    Concur with Baz - 1.0mm is ample - I use to use 1.5mm for lighting circuits etc, never again as designing the circuit/s appropriately can accommodate the 1mm nicely (no more scrunged wires and stuff)
     
  5. Bazza

    Bazza Screwfix Select

     
  6. firsttimebuyer

    firsttimebuyer New Member

    Yes 2 way. Left hand switch on 2 gang and 3 gang for kitchen light. Right hand switch on 2 gang and centre switch on 3 gang for dining room light. Right hand switch on 3 gang for out door light just 1 way switch for outdoor light.
     
  7. Thomas Winfrey

    Thomas Winfrey New Member

    It seems Okay!
     
  8. Bazza

    Bazza Screwfix Select

    The 2-way wont work for dining room light. There's a conductor missing from the 2G switch. SAme for the kitchen light (I assume the red line that passes over the switch terminal doesn't actually connect there?????) In fact, I cannot see how any of your 2-way switching can work.

    Using the way that you have laid it out, it should be a bit like this:

    Screenshot 2016-09-26 09.28.18.png

    Basically the live goes in the COM at one end, the light live goes in the COM at the other end and there's two strappers between the L1s and L2s. Nothing more than that.

    Methinks you need a rethink.

    Sorry, no it doesn't!
     
  9. firsttimebuyer

    firsttimebuyer New Member

    Thanks Bazza.
    I have done a revision. I know that there are a lot of cables in the back boxes but really want to avoid any junction boxes etc under the floor or extra cables at the lighting points, I have plenty of room for a 47mm back boxes if need be. I just wonder if I'm completely missing some obvious way of making this easier.
    Here is the revised plan.
    20160926_122955.jpg
    Thanks again
     
  10. Bazza

    Bazza Screwfix Select

    Looks good to me! (Dont forget the earths, everywhere)
    BTW, what do you use to make your drawings?
     
  11. firsttimebuyer

    firsttimebuyer New Member

    Excellent. No I won't forget the earth's, just left them off of the drawing to make it clearer.

    The drawing software is Microsoft Visio. I use it a lot for work, its really straight forward and you can design/add in your own components and symbols.
     
  12. Comlec

    Comlec Screwfix Select

    I use Visio too. If you have an O365 subscription you can add Visio for another £12.00 a month or less if you take an annual subscription.
     

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