SystemOne Fully Adjustable 4-Inch Round Recessed Floor Box


Adjustable Floor Box

The Hubbell SystemOne Fully Adjustable Recessed floor box is the next step in a long line of quality products delivering power, data and A/V for any application. The challenge of a recessed adjustable floor box is the device depth would vary for different floor thicknesses.

Hubbell has solved this issue with the integral, patent pending, mounting cup which adjusts the device mounting depth to 3 inches, no matter the floor thickness. Additionally, this is helpful for engineered flooring on concrete; the cup allows for the electrical devices to be adjusted upwards up to 1½ inches. This feature is particularly accommodating when the final flooring is unknown at the time concrete is being poured.

Utilizing the same cover design as our 4-inch Recessed Fire-Rated Poke-Throughs, a common look is now possible anywhere in a building, on grade or above


• Patent pending post pour adjustability cup

• High visibility white cup for making easy connections

• cULus Listed – Scrubwater compliant

• PVC, stamped steel or cast iron construction available

• Multiple, open architecture mounting plates for power, data and A/V

• Recessed connections

Adjustable Mounting Cup

The Adjustable Mounting Cup (AMC) is the unique feature of the CFBS1R4 Floor Box product line, and must be purchased separately from the floor boxes. With teeth spaced in 5/32 inch increments, the adjustable cup allows for installation ease and flexibility. The AMC is dropped into the floor box collar then rotated clockwise to set the height and is adjustable until the ground plate is installed. Once the ground plate is installed, the cup is locked into place preventing unwanted adjustment of height. Lastly, the device mounting plate and electrical devices are installed.