A seventy-volt loudspeaker is recessed into a visible gypsum board or plaster ceiling and secured with four screw-down locking flanges and a pre-installed mud ring. The housing connects via flexible conduit to a standard single-gang electrical junction box fed by electrical metallic tubing conduit. An independent eye bolt anchored to the overhead building structure provides a secondary safety attachment point. A number twelve American Wire Gauge solid safety wire extends from the eye bolt to the loudspeaker housing, secured with four tight turns at both the top and bottom ends.
VIEW A: BOTTOM VIEW BUILDING STRUCTURE (SEE ARCH DRAWINGS FOR EXACT CEILING ASSEMBLY) STANDARD 1-GANG JUNCTION BOX (BY ELEC) EMT CONDUIT (BY BY ELEC) FLEX CONDUIT TO LOUDSPEAKER (BY ELEC) CONDUIT & WIRE TERMINATION TO LOUDSPEAKER (BY AV CONTRACTOR) 70V LOUDSPEAKER VISIBLE CEILING GYPBOARD/PLASTER: PROVIDE PRE-INSTALL MUD RING T-BAR: PROVIDE SPANNING TRACKS OTHER: PROVIDE PRE-INSTALL DEVICES AS REQUIRED EYE BOLT FOR SAFETY ATTACHMENT TO BUILDING STRUCTURE (USE REQUIRED TYPE PER MATERIAL) #12 AWG SOLID WIRE SAFETY LINE WITH FOUR TIGHT TURNS IN 1-1/2" (TYP TOP & BOTTOM) SCREW-DOWN LOCKING FLANGE (TYP 4) VAR. 7" 8" Ø8" A VIEW B: SECTION VIEW B --
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