System Sensor SBBRL L-Series Wall Surface Mount Back Box, Red, 4x4

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System Sensor SBBRL — red wall surface-mount back box for standard 4 by 4 L-Series horns, strobes and horn strobes.L-Series appliances normally drop into a recessed electrical box, which is not an option on poured concrete, block or brick. The SBBRL gives those walls a finished surface-mount can in the same red as the appliance, with threaded conduit knockouts and a grounding plate already fitted, so nobody is improvising a box and a ground path on site. Wall surface-mount back box sized for the standard 4 by 4 L-Series horns, strobes and horn strobes Dual threaded knockouts accepting both 1/2 in. and 3/4 in. conduit adapters Grounding plate and grounding screw included 4.8" W × 5.8" H × 1.9" D (12.2 × 14.7 × 4.8 cm); the L-Series dimension drawing gives 4.82" × 5.78" × 1.85" Red finish; SBBWL is the identical box in white Match the box to the appliance, not to the wall. SBBGRL and SBBGWL are the smaller 2 by 4 compact boxes and take 1/2 in. knockouts only; SBBCRL and SBBCWL are the round ceiling boxes; speakers and speaker strobes need SBBSPRL or SBBSPWL, drilled for 3/4 in. conduit only. Show more