A recessed 5S junction box is installed at the ceiling level and attached to a three-eighths-inch diameter threaded rod for structural support. Conduit connects to the back box and runs alongside a cable tray. A three-eighths-inch diameter threaded rod extends upward and attaches to the structure above. One-half-inch gauge galvanized aircraft cable is provided in four directions with a minimum twelve-inch spacing, requiring attachment to the structure above per sheet A2/A-643.
CEILING LEVEL BACK BOX ATTACHED TO 3/8"Ø THREAD ROD 3/8"Ø THREAD ROD ATTACHED TO STRUCTURE FOR SUPPORT, TYP CONDUIT CABLE TRAY RECESSED 5S J-BOX CONDUIT CLIP SCALE: NONE 2 TYPICAL BACK BOX MOUNTING DETAIL 12" MIN. 1/2" GA. GALV. AIRCRAFT CABLE IN 4 DIRECTIONS. SEE A2/A-643 FOR ATTACHMENT TO STRUCTURE ABOVE PLAN
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