This is an NSI/Leviton 3- to 4-Gang Blank Floor Pocket (CTP-6-7200). These rugged boxes are used for power distribution in TV and film studios, theaters and large venue public spaces.
Superior strength 3/8" (9.5 mm) cast iron cover plate
Non-skid tread
Cable opening to handle full size 12/3 cables
Angled receptacles so cable exits without kinking and lies flat to the floor
Two box sizes, up to six receptacles
Voltage barriers available upon request
Self-closing hinged door with 2 or 4 cable slots will not open accidentally
Black finish
Suitable for mounting in concrete or wood
Includes a hinged, self-closing "clean-out" opening
Equipment ground bonding jumper between back box and cover is provided
UL listed #E151877