electrical - What is the proper way to install a junction box above a dropped ceiling? - Home Improvement Stack Exchange
Arlington FS420SCL 20 Cubic-inches Fan/Fixture Box for Suspended Ceilings, Metallic, 1-Pack - Ceiling Fan Accessories - Amazon.com
Arlington | T-Box for Suspended Ceiling Grids
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Commercial Electric 4 in. Round 2-1/8 in. Deep 21.5 cu. in. Metallic Ceiling Fan/Light Fixture Box and Brace Kit for Suspended Ceilings CMB218-SC - The Home Depot
Article 393 Low-Voltage Suspended Ceiling Power Distribution Systems.
Arlington FBRS420SC-1 Steel Fan and Fixture Fan Mounting Box for Suspended Ceiling, 70-pound capacity, Metallic, 1-Pack - Electrical Boxes - Amazon.com
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Arlington Introduces T-Box™ for Suspended Ceiling Grids - Electrical Line Magazine
Arlington | T-Box for Suspended Ceiling Grids
EB24 - Electrical Box Hanger and Center Clip - Jet Stream International
Octagon Box with a Back Side Tie Wire Tab, Side T-Bar Slots, & Bottom Knockouts 54171-TBAR - YouTube