Inlight Single Gang Electrical Outlet Box, 14 Cu In, 3 Pack Review

Inlight builds this box specifically for old work, meaning it installs into a wall that already has finished drywall rather than needing access from behind during framing. That matters for anyone adding a new switch or outlet to an existing room without opening up the wall more than the box's own cutout requires.

Each box provides 14 cubic inches of interior volume, a figure that matters directly for electrical code compliance since box fill rules limit how many wires and devices can legally share a box of a given volume. The box measures 4 5/16 inches long, 2 1/4 inches wide and 2 15/16 inches deep, sized for a single gang device, and ships as a 3 pack under part number IN-0501-4-3.

UL Listed certification backs the build, and Inlight states the box suits both residential and commercial old work applications, with screws spaced 3 3/8 inches apart to match standard devices and switches.

Sturdy PVC is the stated construction material, and Inlight specifically calls out that there are no moving or loosening parts to deal with, a detail aimed at the common complaint with some old work boxes that their mounting wings or ears can work loose over time or during installation.

Built-in cable clamps are integrated into the box itself, designed to grab wires firmly as they enter, which keeps cable from pulling at the connection point inside the box after the cover plate and device are installed. That is a meaningfully different approach from a box with no clamp at all, where wire strain has to be managed entirely by the device terminals or separate clamp hardware.

Screw spacing of 3 3/8 inches is built to match standard devices and switches, meaning a typical switch or outlet should mount directly without needing an adapter plate or extension screws. At 14 cubic inches of interior volume, the box is sized to code for a single device with a reasonable number of conductors, which is the figure an electrician or careful DIYer checks against the National Electrical Code's box fill table before adding wires.

The 3 pack format and UL Listed status round out the practical side: enough boxes for a small multi room project in one purchase, with third party safety certification rather than an uncertified import box.

For an old work install, the single biggest performance factor is whether the box seats securely in a cutout without wall access from behind, and a PVC box with no loosening moving parts, as Inlight describes it, is built around exactly that constraint rather than depending on screws into wall studs.

The built-in cable clamps are the detail most relevant to long term reliability, since a box that lets wires shift or get pulled at the entry point over years of use is more likely to develop a loose connection than one that clamps the cable firmly where it enters.

At 14 cubic inches, this box is sized for a standard single gang device install, and that volume figure is the number to check against the specific number and gauge of conductors planned for the box under code, rather than assuming any single gang box will accommodate any wiring scenario.

UL Listed certification on an electrical box is a meaningful assurance point, since it means the product has been independently evaluated against a recognized safety standard rather than relying solely on the manufacturer's own claims.