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melting connectors...

Discussion in 'Safety' started by w3st0n21, Apr 30, 2009.

  1. w3st0n21

    w3st0n21 Active Member

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    so last night, which was the opening night of Grease, we had a little problem after the show. i was standing in the booth with the sound tech (who also helps me with lights when he isnt doing sound) and we hear the stage manager yell back to the booth something to the effect of "your lights are on fire!" which of course sets off a red flag in my head. (mainly because i had borrowed 10 scrollers from my church and would hate to see those go up in flames) so i turn down all the faders on the board and run up on stage to find a smoking/melting/shorting out connector that one of the strip lights was connected too. ben (the sound tech) grabbed the fire extinguisher just in case it did catch on fire, while i went up to the patch panel and unpatched that circuit and cut the power to the dimmers. the whole time we kept people off the stage and away from the molten liquid plastic dropping from the ceiling and got the drama teacher and the maintnance staff in there. so just goes to show that a few high school techs can handle more problems than some might think :grin:
     
  2. gafftapegreenia

    gafftapegreenia CBMod CB Mods

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    So did you figure out what went wrong so something like this doesn't happen again?
     
  3. w3st0n21

    w3st0n21 Active Member

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    Either dirty connectors, causing high resistance. Or the twist lock connector wasn't twisted.
     
  4. Clifford

    Clifford Active Member

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    Twistlock does not have to be locked. I've found lines running at 2.2kW unlocked without a problem.
     
  5. cdub260

    cdub260 CBMod CB Mods

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    It's more likely that there was a loose screw inside the connector and arcing electricity.
     
  6. gafftapegreenia

    gafftapegreenia CBMod CB Mods

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    That's what I'm thinking.

    It's funny that I've seen more melted Twists and Edisons than Stagepin, and I've probably worked more with Stagepin.
     
  7. Les

    Les Well-Known Member

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    That might be because Edisons and Twistlocks usually use a screw which the wire wraps around (or in some cases, the wire is pushed in and tightened between two plates and held in by friction), while stage pins use those push-in connectors (what are those called, where the leads are pushed straight in to the back of the pins?) or ring terminals.
     
  8. w3st0n21

    w3st0n21 Active Member

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    The maintnance staff told me they need to be locked. (I sorta figured they didn't need to be, but in a high school situation it doesn't hurt to lock them. I didn't make the repair myself so I wouldn't know if it was a loose screw or not.
     
  9. tech2000

    tech2000 Active Member

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    Reminds me of an incident several years ago...except it was a problem with plastic wire caps on a 1000w fixture...
     

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