cable for smoke alarm

Discussion in 'Electrics UK' started by Perth, 8 Mar 2006.

  1. Perth

    Perth

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    Hi want to run wiring for eventual interconnected smoke alarms (my building regs say have to go to mains) so I can plasterboard wall. Got 6243Y 1.0mm 3 core + e for this but need a longer length. The 3 core i got (too short) has red, black, etc cores - is this different from the 1.0mm 3 core + e with blue, red, yell cores or can I use that ?

    Am running a 3 core cable from where CU will be, to location of 1 st smoke alarm (the original 3 core (black/red/etc cable) and from there along to location of 2 nd smoke alarm ( 3 core blue yell red cable) - is that right?

    Sorry if this seems obvious I didn't realise you got 3 core +e in diff colours

    Thanks in advance
     
  2. andy

    andy

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    dont get you with colours

    3core was red yellow and blue, now brown black and grey?

    you need a 3core between lights for a signal line. you can use 3core to CU if you want, but you can get away with twin
     
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  4. Perth

    Perth

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    oops your right - it is brown/black/grey!
    So guess I was sold both the new cable and the old cable at the same time.

    So 1.0mm T+E from Cu to 1st alarm and 3 core +E between alarms.

    Cheers
     
  5. Perth

    Perth

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    Will the elec be happy to get away with twin from CU or will he prefer 3 core?
     
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  7. andy

    andy

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    you only need live neutral and earth to first alarm. so there wont be a problem (and if anything, 1 less core to deal with)
     
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