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Flood light wiring

Discussion in 'Electrics UK' started by Snowyy, 24 Jul 2021.

  1. Snowyy

    Snowyy

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    Hi
    Looking at replacing my floodlight with intergrated pir with a separate light and separate pir that will be located around the corner from the light. I also want to add an additional light with an intergrated pir to the same circuit and would like both lights to come on when either of the pirs are activated. The current light is run of a plug from the inside of the house, I have an idea of how to wire these but want to make sure it is correct. Figured it was supply to pir, then n, sl and e from pir to light. Also n, l and e from pir to light with pir. Then sl from light to sl to light with pir, resulting in light with pir having power and triggering the other light when motion detected and pir having power which switches light on and triggers the other unit when motion detected. Hope I’ve got that correct.
     
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  3. ericmark

    ericmark

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    Some PIR's will work in parallel others will not, so you need to read the instructions. Personally I intend to move to internet devices and app on phone, I see no point in helping an intruder by lighting their way, and find the lights going out as PIR has not detected me dangerous.
     
  4. Taylortwocities

    Taylortwocities

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    The basic problem with your plan is that many of today’s integrated floodlight+PIR products do not provide support for switching or being switched by external devices. Most of them only have L&N terminals. The SL connection being buried inside the guts.
    There may be some out there, but you’ll find information thin on the ground. Also, as Ericnark says, they often cannot work in parallel with other devices.

    IMO, the reliable way is to abandon the integrated FLOOD+PIR approach, but use standard floods and as many separate PIRs that you think you need. Then you can arrange a variety of switching options.
     
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  5. bernardgreen

    bernardgreen

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    Taylor has given the best advice.
     
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  6. FrodoOne

    FrodoOne

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    I agree with both of the above
    BUT
    I wish to add the following: -

    When one installs multiple PIRs to control any circuit it is a "good idea" to install, between each of the "control" wires of those PIRs and the "load", a Connect/Disconnect switch, so that each individual PIR can be used to control the Light Fitting (Luminaire) concerned and whatever is happening to the other PIRs does not interfere with any such setting of an individual PIR.

    Yes. This IS an additional cost and initial inconvenience.
    However, it makes setting up the sensitivities of each PIRs much easier and, when one of them fails (as they will), it makes determining which one it is much easier.

    Plan ahead !!!!
     
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  7. sparkymarka

    sparkymarka

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    Or fit a proper lighting system that will last far longer that the cheap tat ….EG….GJD lighting system …
     
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