Pelco Heavy-Duty Spectra Back Box BB5HD User Manual

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a. Locate the center point of the mount­

ing location. Drill a hole in the ceiling 
using a 3/32-inch drill. 

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b. Insert the compass tool into the hole. 

Draw a circle on the ceiling using the 
compass tool and a pencil. Cut the 
circle out of the ceiling. 

Use the eight 10-32 x 3-inch screws (supplied) and install the mounting ring and 
two back mounting plates. 

a. Line up the mount ring with the eight 

fastener holes. 

c. Install fasteners through the mount ring, 

ceiling and out the back mounting plate. 

b. Feed one back mounting plate through 

the hole in the ceiling and line up with 
four fastener holes. 

d. Install second back mounting plate. 

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c. Use the mounting ring as a template 

and mark the hole pattern onto the 
mounting surface. Prepare the holes. 

CEILING 

MOUNTING 
RING 

SPRING CLIP 

8-32X.275 INCH SCREW 

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c. Compress the spring clips on the back 

box and push it through the hole, until 
the clips spring back.Tighten the screws 
until you hear a clicking noise. Insert the 
two 8-32 x .275-inch screws to secure 
the back box to the mount ring. 

ATTACH SAFETY CHAIN HERE 

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a. Attach the conduit fitting, lock nut, and 

safety chain bracket. Install a safety 
chain/cable (not supplied) that will 
support up to 16 pounds (7.3 kg). 

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b. Turn  the thumbscrew and open the 

hinged door to the back box. Pull wiring 
into the back box through the conduit 
fitting. Refer to Tables A and B in the 
Appendix for wiring distances. 

Pelco Installation Manual C2429M (3/01) 

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