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Insulation resistance test

Discussion in 'Electrics UK' started by oldspark, 2 Aug 2007.

  1. oldspark

    oldspark

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    Hi Looked at an industrial unit today for testing theres a large open wharehouse unit with approx 60 fleurescents very high up.

    Whats the way to test them without disconnecting all the lights.

    dont get these very often thankfully.........

    Thanks
    OS
     
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  3. RF Lighting

    RF Lighting

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    hire a scissor lifter
     
  4. tim west

    tim west

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    depends on what type of flourescent if they are starter switch types then remove all the starters this will isolate Live from Neutral
     
  5. oldspark

    oldspark

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    have you seen the price of these thing to hire..............

    any cheaper sugestions
     
  6. Spark123

    Spark123

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    Are you suspecting a fault?
     
  7. oldspark

    oldspark

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    No, just an IR test..... and see what the result finds
     
  8. Spark123

    Spark123

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    As a Periodic Inspection you mean? Is it possible to connect L&N together and IR test to earth?
     
  9. Lectrician

    Lectrician

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    Thats what I would do - although you may get shocking readings due to the inductors - they are never great.
     
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  11. tim west

    tim west

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    They are designed for HT so 500v won't break them down to earth.
     
  12. oldspark

    oldspark

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    Yip thats what I was after, Question is would that test be ok and what readings am i likely to get. the fittings dont look as if they have been up long
     
  13. tim west

    tim west

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    should do test between L+N also.
     
  14. ricicle

    ricicle

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    Not required if it is impractical to remove loads.Just L+N to E is suffice.
     
  15. tim west

    tim west

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    you can isolate L+N by removing all the starter switches if that type.
     
  16. Spark123

    Spark123

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    How do you remove the starters ;)

    The regs call for the insulation resistance for a 500vDC test to be above 0.5 Meg, however anthing less than 2 Meg should be investigated further. Do you have a copy of guidance note 3?
     
  17. tim west

    tim west

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    Starter switches, twist and pull voila done :LOL:
     
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