Product Description

4" dia. round fixture support box for use with nonmetallic sheathed cable

Catalog #: SB-CBG

Width: 4 in.
Depth: 2-3/4 in.
Volume: 25 cu. in.

Type of Installation: Old or New Work

Round Ceiling Box

Carton Quantity: 12
Carton Weight: 4 lb.

UPC: 085339945079
UNSPSC: 39121316
U.S. Patent No. 7,855,338

U.S. Patent No. 6,365,831 B1
Country of Origin: United States of America


Machine tapped fixture holes, adjustable mounting plate for additional substrate thickness


New and old work residential construction 2 HR fire resistive floors and ceilings (50 lbs. fixture support)


ANSI / UL 514C: File No. E30594


Ul Code Black


Fire Classification

Fire Test of Building Construction Materials
ANSI / UL 263: File No. CEYY.R9379 (Category / File No.) 

Note: Products must also be certified to: ANSI / UL 514C


Fire Resistance Classification in Floor-Ceiling Assemblies 2-Hours or Less
Distance between boxes in adjacent cavities may be reduced to 5 ½ inches

Note: For more details please refer to the UL fire resistive directory and Allied Moulded’s CEYY.9379 (Outlet boxes and fittings classified for fire resistance)






Internal screws with adjustable slider plate for substrates 1/2" to 1 5/32"

Additional Materials

Galvanized steel brackets and plated carbon steel fasteners

Carbon steel fasteners

Galvanized ground strap with plated carbon steel fastener and green plated carbon steel ground screw

Support Rating

50 lbs fixture support