Hide Free-Floating TV Wires (Floor Box Outlet)
To hide the power and signal leads that hang between a floor outlet and a wall-mounted TV, do not tuck the TV’s power cord into the wall or floor. Instead, have an electrician install a proper receptacle behind the TV, or use a listed power-relocation kit as directed. Run signal cables on a separate, approved in-wall path, and keep the floor box accessible.
A floor outlet can be a useful power source, but it does not automatically provide a safe route to a TV above it. The clean result comes from planning two separate paths: one for building wiring that supplies a receptacle near the TV, and one for signal cables such as HDMI. That distinction removes visible leads without hiding an ordinary power cord where it does not belong.
Plan the route from the floor box to the TV
A floor box is an electrical enclosure in the floor that holds a receptacle or other listed device. It is not a cable tunnel. Before choosing a route, identify what the box contains, how it is supplied, and what lies between the floor and the TV. The local code and product instructions determine what work is allowed.
Start by checking the box cover and device for damage, loose parts, moisture, or signs of overheating. Keep the floor box reachable after the work; do not bury it beneath flooring or treat its cavity as a passage into the wall. A qualified electrician can trace the floor-box feed, assess the existing circuit, and determine whether it can supply a new receptacle behind the TV.
Next, check the wall and mount. Find the framing, likely utility routes, and any pipes or cables before cutting. Note the mount’s full range of movement, not just its resting position. The new receptacle and cable openings must stay clear of the mount’s fasteners and moving arms.
The route may be straightforward in an open-stud wall, but finished walls can contain fire blocking, insulation, masonry, or other barriers. A path that looks clear from one side may not be clear inside. Do not drill or notch framing until structural limits and concealed utilities have been checked.
The National Electrical Code (NEC) is a model code adopted and amended by local authorities. Confirm the edition and local rules that apply to your home. For branch-circuit work, have an electrician assess or perform the installation rather than assuming an existing floor outlet can be extended in any direction.
Choose a legal power path and a separate signal path
A branch circuit is the fixed wiring that supplies outlets and other electrical devices. A listed power-relocation system uses specified components to bring power from an approved source to a receptacle behind the TV. Signal wiring carries data or audio and video, not household power. Keep these functions separate and follow the code and instructions for each.
NEC 400.12 restricts using flexible cords as a substitute for fixed wiring. That includes an ordinary TV power cord or extension cord hidden inside a wall, floor, raceway, or floor-box cavity. An in-wall-rated HDMI cable does not change this rule: the TV power lead remains a flexible cord, even if placed inside conduit or a wall channel.
| Route option | What it does | When it may fit | Key limit |
|---|---|---|---|
| Listed power-relocation kit | Uses the kit’s specified components to supply a receptacle behind the TV | When the product instructions and local rules allow the planned route | Use the full specified system; do not substitute an extension cord or TV lead |
| New receptacle on a branch circuit | Adds a fixed receptacle near the TV | When an electrician confirms an approved route and circuit capacity | Requires compliant wiring, boxes, connections, and protection |
| Surface-mounted raceway | Encloses cables on the wall surface | When opening the wall is not practical | Use only products rated for the cables and purpose; ordinary power cords still cannot be concealed as fixed wiring |
| Visible cord cover | Covers a cord on the wall surface without placing it inside the wall | When the cord remains accessible and the product is suitable | It is not an in-wall wiring method and does not make an extension cord suitable for concealment |
Run signal cables separately, as their listing and applicable code permit. Choose cable marked for the intended in-wall use; a cable’s label and product data matter more than its appearance. Use approved boxes, bushings, and protection where required. Avoid crushing cables or bending them sharply, and check connector clearance behind the TV before settling on an outlet location.
A passive cable route has no universal airflow requirement. Do not use a wall cavity, box, or enclosure as a ventilation path. The enclosure’s purpose and listed use should match the components installed in it.
Check clearances, box fill, and mounting space
Box fill is the amount of space conductors and devices occupy inside an electrical box. The box must be large enough for the actual wiring and components, not merely big enough to accept the receptacle. Framing clearance, cable protection, and mount placement also affect where the outlet can safely go.
For holes bored in wood framing, NEC 300.4(A)(1) requires the hole edge to be at least 1¼ inches (32 mm) from the framing member’s edge. If that clearance cannot be met, the required steel protection plate must be at least 1/16 inch (1.6 mm) thick. A decorative cover or low-voltage plate is not a substitute for required cable protection.
NEC 300.14 sets minimum free-conductor length at outlet boxes: at least 6 inches (150 mm), measured from where the conductor emerges from its cable sheath. When the box opening is less than 8 inches (200 mm) in any dimension, at least 3 inches (75 mm) must extend beyond the opening. The installer must also calculate box fill under NEC 314.16(B).
For box-fill calculations, NEC allowances include 2.00 cubic inches (32.8 cm³) for each 14 AWG conductor and 2.25 cubic inches (36.9 cm³) for each 12 AWG conductor. These are not the only items that can count toward fill. The calculation must include applicable device, clamp, and grounding allowances, along with the box’s marked capacity.
Choose the TV mount and anchors based on the manufacturer’s ratings for the TV’s weight, mount type, and wall material. There is no universal hardware load rating. Confirm that the fasteners engage the required substrate and that the outlet, cables, and boxes will not conflict with the mount. With a full-motion mount, check the entire movement range.
Install and verify before closing the wall
A safe finished route depends on the parts behind the wall as much as the visible outlet. Before work starts, identify the circuit and route, confirm the products are listed for their use, and protect conductors from damage. Before closing the wall, inspect the wiring and test the system.
De-energize and verify. Turn off the relevant circuit before opening electrical boxes or working near existing wiring. Verify that it is de-energized with appropriate test equipment. If you cannot identify the circuit or safely confirm its status, stop and call an electrician.
Trace the route. Check the floor-box feed and inspect for obstructions before cutting. Do not assume the floor box can serve as a concealed-wire chase. Confirm the path, framing clearances, and mount positions before making openings.
Install power by an approved method. Use a listed in-wall power-relocation system exactly as labeled, or have an electrician install a new receptacle on an approved branch-circuit route. Use only the system’s specified in-wall components. Never hide an extension cord, power strip, or TV’s detachable power lead in the wall, floor, raceway, or floor-box cavity.
Route signal cables. Use cable rated for its intended in-wall application, with suitable boxes and bushings. Provide required protection, avoid sharp bends, and do not crush the cable when securing or finishing it. Keep the signal path separate from power wiring as required by the product listing and local rules.
Inspect and test. Before closing the wall, confirm that boxes remain accessible, box fill is correct, conductors are protected, and devices are connected as required. Check that no ordinary TV cord is concealed. Test receptacle polarity and grounding with appropriate equipment, then test the signal connection.
Check movement and clearance. Move the TV through its full range before final trim or patching. Confirm that the screen, mount, fasteners, outlet, and cable exits do not collide or pull on cables. Make sure the signal works in the final position.
Real-world layouts: what the route changes
These examples show common planning choices, not a claim that one method fits every home. The correct route depends on the floor-box construction, wall access, circuit, and product instructions. I start by separating the power question from the signal question; that simple check often prevents a visually neat plan from becoming an unsafe one.
Open-stud wall above a floor box: During renovation, a clear wall cavity may make it easier to place a receptacle behind the TV and route signal cable separately. The electrician still confirms the circuit, box location, framing protection, and applicable rules before the wall is closed. The floor box remains accessible.
Finished wall with a fixed mount: If opening the wall is not practical, a suitable surface raceway or cord cover may be less invasive. It can reduce visible clutter, but it does not permit an ordinary power cord to be buried inside a wall or floor. For a fully concealed power lead, use an approved power solution instead.
Full-motion mount near a floor outlet: The TV may sit close to the wall when folded in, then extend or turn during use. Plan outlet and cable exits around the mount’s full motion. If a cable becomes pinched or pulled at any position, adjust the route before finishing.
| Site condition | Practical next step |
|---|---|
| Floor-box cover or receptacle is damaged | Have the box and device assessed before using them |
| Wall route is blocked or uncertain | Do not cut blindly; have an electrician or qualified installer inspect it |
| Outlet would sit behind a mount arm | Reposition the planned outlet or cable exit to maintain clearance |
| No in-wall work is desired | Consider a suitable surface route, while keeping power and signal rules in mind |
FAQ: floor-box power and TV cable concealment
These answers address the usual decisions when a floor outlet sits below a wall-mounted TV. Local code adoption and product listings can change what is allowed, so use the applicable instructions and ask an electrician about branch-circuit work. The core rule remains: conceal fixed wiring by an approved method, not an ordinary flexible power cord.
Can I run the TV’s power cord from the floor box through the wall?
No. An ordinary TV power cord is a flexible cord, not a substitute for fixed wiring concealed in a wall or floor.
Can I put an extension cord inside conduit?
No. Conduit does not make an extension cord suitable as concealed permanent wiring.
Can the floor box itself be used as a cable chase?
Do not assume so. Its listing and construction define its use; keep it accessible and have the route assessed.
What is the cleanest way to hide TV power?
Use a listed power-relocation system exactly as instructed, or have an electrician install a receptacle behind the TV on an approved route.
Can HDMI share the power route?
Only when the cable, system listing, and applicable code permit that arrangement. Use in-wall-rated signal cable and follow separation requirements.
Does an in-wall-rated HDMI cable make the TV power cord safe to hide?
No. The HDMI rating applies to that signal cable, not to the TV’s flexible power cord.
How far must a bored hole be from a framing edge?
Under NEC 300.4(A)(1), the hole edge must be at least 1¼ inches (32 mm) from the framing-member edge. If not, required steel protection is at least 1/16 inch (1.6 mm) thick.
How much conductor must remain at an outlet box?
NEC 300.14 requires at least 6 inches (150 mm) measured from where the conductor leaves its sheath. At least 3 inches (75 mm) must extend past a small box opening under the stated size condition.
Can I put the outlet directly behind the TV mount?
Only if the outlet remains accessible and clear of mount fasteners and moving parts. Check the mount’s full movement before setting the final location.
Do I need ventilation in the cable path?
There is no universal airflow requirement for a passive wiring route. Do not use a wall cavity or electrical box as a ventilation path.
(This article was written by one of our staff writers, Michael Holloway. Visit our Meet the Team page.)
