Lew Electric Round Floor Box Kit (Screw Plugs) - Reliable In-Floor

In this review of the Lew Electric Round Floor Box Kit the bottom line is simple: it is a practical choice for homeowners and contractors who need a discreet, functional in-floor outlet for wood floors. The kit's most compelling feature is its straightforward installation and precise fit for a 3 7/8' cutout, which makes it easy to seat in standard wood subfloors. The review highlights usability: a solid metal cover with screw plugs, a lightweight polymer box, and integrated wing clamps that secure the unit without complex modifications.

Key Features

• Cover diameter: The 5 1/16' round cover provides a neat, low-profile finish that blends into most interior floors.
• Cutout compatibility: The 3 7/8' floor cutout dimension ensures the box fits common wood floor openings with minimal trimming.
• Box depth: The 3 1/4' junction box depth accommodates standard wiring and a duplex receptacle while remaining compact under the floor.
• Secure mounting: Three wing clamps hold the box firmly to the subfloor so the installation stays stable without additional brackets.
• Material mix: A solid metal cover combined with a lightweight polymer box balances durability at the visible surface with manageable weight below the floor.
• Warranty and indoor use: The kit is intended for indoor wood floor installations and ships with a manufacturer warranty for added peace of mind.

Who It's For

The Lew Electric Round Floor Box Kit is aimed at homeowners, finish carpenters, and electricians installing in-floor power in rooms with wood floors who want a discreet outlet with an easy installation. It fits remodels and new builds where a round floor opening is acceptable and a clean, metal cover is preferred.

It is not for concrete slab installations or exterior use, and buyers who require deeper junction capacity or specialty wiring accommodations should look for larger or slab-rated floor boxes instead.

Pros & Cons

Pros

• Quality appearance: the metal cover gives a refined, low-profile look that customers note improves room aesthetics.
• Ease of installation: accurate dimensions and three wing clamps make it straightforward to secure in wood subfloors.
• Good functionality: includes a duplex receptacle and screw plug covers for a tidy finish when not in use.
• Compact depth: the 3 1/4' junction box depth handles typical wiring without excessive space under the floor.

Cons

• Mixed build feedback: while many report solid assembly, at least one user noted a plastic seam issue in the polymer box that could affect long-term durability.
• Wood-floor only: not suitable for concrete or outdoor installations, limiting where it can be used.

Specifications

Cover diameter	5 1/16 in
Cutout diameter	3 7/8 in
Junction box depth	3 1/4 in
Mounting	3 wing clamps to secure to subfloor
Cover type	Solid metal with screw plugs
Intended installation	Indoor wood floor installations only
Includes	Duplex receptacle and manufacturer warranty

Our Verdict

The Lew Electric Round Floor Box Kit is a sensible, value-oriented solution for anyone needing an in-floor outlet in wood floors; it delivers a tidy metal cover, accurate dimensions, and easy mounting that save time during installation. For typical residential and light commercial wood-floor projects it offers good utility and appearance, though buyers needing slab compatibility or extra-thick junction capacity should choose a different model.

Frequently Asked Questions

Can this be installed in concrete floors?
No. This unit is designed specifically for wood floor installations and is not suitable for concrete slabs.

Does the kit include a receptacle?
Yes. Each box ships with a duplex receptacle included for immediate installation.

How is the box secured to the floor?
The box uses three wing clamps that tighten against the subfloor to hold the box firmly in place.