An electrical enclosure box is anchored to wall backing using four number twelve self-drilling screws secured through point-four-two-inch diameter interior box mounting holes. The box measures twenty inches wide by sixty-eight inches high with edge clearances of two-and-a-half inches and three inches. Backing attachment is detailed per sheet reference ten slash S five point six zero.
TYPICAL BOX WITH INTERIOR BOX MOUNTING HOLES (4) .42 DIA (4) #12 SELF DRILLING SCREWS INTO BACKING PER 10/S5.60 20.00 68.00 2.50 3.00
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