Grounding question

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

  1. bob800

    Thread Starter Member

    Dec 10, 2011

    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


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

    Thread Starter Member

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


    Jan 28, 2011
    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.