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Outside light wiring

Discussion in 'Electrics UK' started by Nick standley, 23 May 2021.

  1. Nick standley

    Nick standley

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    The company I work for does industrial electrical work. Final connections will be done by a qualified electrician.
    I am putting up some outside wall lights connected together with glued conduit. The lights will be fed direct from the fuse board with their own trip,and a light switch inside of the garage. I have 2 questions.
    1, can I run 1.5mm singles through the conduit to the switch and lights?
    2, what size trip shall I use.
    Looking forward to your replies.
     
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  3. Nick standley

    Nick standley

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    I am asking cos I don’t want to bug my work mates on a Sunday and I want to order everything tonight.
     
  4. AndyPRK

    AndyPRK

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    1.5mm
    B6 trip
     
  5. bernardgreen

    bernardgreen

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    Double pole switch to provide isolation of the lights if ( when ) they are damaged or soaked and a Neutral to Earth fault occurs. An RCD will trip on a N to E fault even is the Live the lamps has been switched OFF.
     
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  6. ericmark

    ericmark

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    For lighting using B15. B22. E14. E27 or E40 lamp holders has a maximum size of 16A, normal is to use 6A are ceiling roses rated at 6A, normal is to use 1.5 mm² cable. Unless one gets special authorisation outside lights are limited to 150 watt, however for all we know you are wiring a out door sports stadium with 20 x 250 watt flood lights, so we can only guess.
     
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  8. SUNRAY

    SUNRAY

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    OOO When did the 150W rule come in? I hat to think about the number of 300W & 500W floods i've installed.
     
  9. ericmark

    ericmark

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    A long time ago, all part of building regulations. Today it would be lumen not watts, I think around 2000 around 1992 I worked fitting as you say 100's of 500W and 1500W lamps, but by 2000 it was metal halide and most were 75 to 150 watt, where I worked we had one 500 watt and we had to get planning permission for it.
     
  10. 333rocky333

    333rocky333

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    Was about the same time most places stopped selling the normal halogen fittings and started selling the silly little ones with the shorter lamps
     
  11. securespark

    securespark

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    For a long time, I was fitting Osram 100W lamps in the 500W floods.

    They were surprisingly bright.
     
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