Grounding question

Discussion in 'General Electronics Chat' started by bob800, May 5, 2012.

  1. bob800

    Thread Starter Member

    Dec 10, 2011
    48
    3
    Hello,

    I'm in the process of assembling a fluorescent light fixture (no instructions provided), but I've come across a possible problem:

    On no part of the fixture is there any written indication about where a ground wire should be attached (if it's even intended to be grounded). However, I've located a green screw which seems unfit for anything except grounding (see attached image for more detail), so I fastened the wire at that spot. I tested the conductivity to the outer shell with a multimeter and found that the connection was indeed good. But I also found that the ground screw was electrically connected to the body of the ballast transformer... Here's where my lack of knowledge comes into play: Is it safe to ground the body of a transformer without any instruction to do so? It seems safe to me, but I just wanted to get a more educated opinion before I start something on fire...:D
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,049
    3,244
    Yes, that appears to be the ground screw and grounding the ballast case is fine.
     
  3. bob800

    Thread Starter Member

    Dec 10, 2011
    48
    3
    Thanks! -----------------
     
  4. K7GUH

    Member

    Jan 28, 2011
    191
    23
    The whole point of grounding in this fashion is to blow a fuse / breaker if any of the components develop a leak or other defect. It ain't perfect, but it's a lot better than a short circuit through a human body part.
     
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