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Thread: LED: wire colors?

  1. #11
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    Quote Originally Posted by MattS87 View Post
    I see this color scheme on a lot of 24V photo eyes and proxes as well. So is the voltage not relevant on the IEC chart?
    My guess is that it's coincidental for that instance. But I'm also assuming there's a typo there and don't know what was meant by "proxes."

  2. #12
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    Likely he means proximity card or fob readers for entry systems.

    -Hal

  3. #13
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    Quote Originally Posted by MAC702 View Post
    My guess is that it's coincidental for that instance. But I'm also assuming there's a typo there and don't know what was meant by "proxes."
    Sorry maybe a typo but I am referring to an inductive proximity sensor. I use a lot of AB and TURCK that are 4 wire where Brown is +, Blue is -, Black and white are n.c/n.o. This is the case whether AC or DC sensors

  4. #14
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    Quote Originally Posted by MAC702 View Post
    Would this have to be an isolation xformer? Couldn't this application also be done with an autotransformer?
    Yes it could, But 240 x 240 transformer is likely going to be preferred over 120x240 when possible anyway.

  5. #15
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    I doubt that the luminaire is listed. UL 1598 Standard For Safety For Luminaires, requires that the insulation of the neutral conductor be white or grey or have a white trace or raised longitudinal ridges, if a parallel conductor flexible cord.

    My guess is this is a European luminaire with a CE mark only and has never been evaluated to UL 1598.

    Chris

  6. #16
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    Quote Originally Posted by azebra View Post
    Friend of mine receives light fixture with yellow/green stripe wire,(earth gnd), then a blue and a brown lead? Being in the industrial construction field mostly, I am not familiar with these colors and am hoping for guidance from the experts on here. Thanks and merry Christmas, Paul.

    so open the light fixture and read the diagram on the controller itself. (ballast looking thing) its will tell you everything you need to know. most now days are universal voltage types typically rated 120-277 which yes includes 240 be it to neut as in the UK or two hots or high leg here in the US.

  7. #17
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    Quote Originally Posted by Little Bill View Post
    No, these machines either were totally 120V line to neutral or a mixture of line-line 208V-240V or line to neutral 120V.

    But I am aware of Europe's 240V line to neutral voltage.
    And the different frequency - not that it always matters.
    Si hoc legere scis nimium eruditionis habes.

  8. #18
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    Quote Originally Posted by raider1 View Post
    I doubt that the luminaire is listed. UL 1598 Standard For Safety For Luminaires, requires that the insulation of the neutral conductor be white or grey or have a white trace or raised longitudinal ridges, if a parallel conductor flexible cord.

    My guess is this is a European luminaire with a CE mark only and has never been evaluated to UL 1598.

    Chris
    Does standard require to mark one conductor white if polarity doesn't matter to operation or for things such as a luminaire with screwshell lamp holder?

    Don't mess with the quartz tube fixtures much at all anymore - unless maybe removing one, but seems those typically had both supply leads same color, sometimes both were even white.

  9. #19
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    Quote Originally Posted by kwired View Post
    Does standard require to mark one conductor white if polarity doesn't matter to operation or for things such as a luminaire with screwshell lamp holder?

    Don't mess with the quartz tube fixtures much at all anymore - unless maybe removing one, but seems those typically had both supply leads same color, sometimes both were even white.
    UL 1589 requires the screwshell of a lampholder directly supplied by the branch circuit shall be connected to the neutral grounded conductor. Then it goes on to say that a conductor that is intended to be connected to the neutral conductor of the branch circuit needs to be white or grey etc. The standard does not specifically address non polarized connections.

    Where UL 1598 specifies that a neutral conductor be white or grey the use of a white wire for an ungrounded conductor would not meet the standard.

    Chris

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