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Discussion Starter · #1 ·
Hi all, first post here! I have the opportunity to pick up as many used 4'x2' flourescent fixtures as I can carry from an office building that's being renovated, and I'm thinking of using them in my basement and garage, both of which are unfinished. These light fixtures were installed in a dropped ceiling, but I don't have any ceiling grids, so I'm trying to think of a way I could install these without installing a grid. Each fixture has a suspension point on each corner which was used to add support to the fixture when it was placed in the grid. I'm considering using those to suspend the fixtures directly from the ceiling joists, but I have a few ideas on how to do it:

  1. Install nails or hooks on the ceiling joists; 4 per fixture, so I support each corner individually.
  2. Install hooks on the ceiling joists; only use 2 per fixture, with a chain that goes from the two suspension points on the 2' side of each side of the fixture (so each fixture uses two chains spanning from corner to corner on the short sides, and that chain then hooks to the hook attached to the joist).
  3. Drill holes in the body of the fixture and mount it directly to the ceiling. (I'm afraid this might compromize the structural integrity of the fixture; thoughts?)

I'm also not quite sure what the requirements would be for conduit, etc. I'm assuming I would need to run romex to a junction box (one per fixture), with flexible conduit running from the j box into the fixture. This would follow suit with the majority of the other newer wiring in my house. Do I need to do more/less here?

I'd appreciate your thoughts and ideas, thanks!

-Dan
 

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Why are these available ? The most likely answer is that they are probably the obsolete T12 fixtures.

I don't recall ever seeing of a manufacturer approved way to hang troffers other than the dropped ceiling grid installation. Without the mfg approval, your other methods are a technical code violation.
 

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Discussion Starter · #3 ·
Why are these available ? The most likely answer is that they are probably the obsolete T12 fixtures.

I don't recall ever seeing of a manufacturer approved way to hang troffers other than the dropped ceiling grid installation. Without the mfg approval, your other methods are a technical code violation.
They are T8 fixtures; my company is actually renovating this office space we recently acquired. Someone didn't like the old fixtures, so they bought all new ones.

Regarding code violation, I was concerned about that, but I also didn't know how the rules changed between residential vs commercial.
 

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Check the voltage on them as well. You may need to change all the ballasts to be able to use them at home.
Industrial fixtures are typically 347 volts in Canada or 277 volts in the US.

If they are usable I would just screw them into the joist.
 

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Discussion Starter · #5 ·
Check the voltage on them as well. You may need to change all the ballasts to be able to use them at home.
Industrial fixtures are typically 347 volts in Canada or 277 volts in the US.

If they are usable I would just screw them into the joist.
Good point (on both points). I will definitely verify voltage before I pick them up (the electricians on site will know).
 
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