Hide TV Cables in Drywall (Recessed Storage Box)
A recessed TV box can hide cables and approved power connections inside drywall, but the right kit and layout matter. Choose a listed assembly, check the wall cavity before cutting, and keep ordinary TV power cords out of the wall. Follow the kit instructions and locally adopted codes, especially for cable separation, framing, fire protection, and access.
A newly mounted TV can look clean until its cords drop down the wall. A recessed box may solve that problem, but it is not just a hole with a cover. The assembly, wiring, and wall all need to work together. I start by checking what is inside the wall and what the product is approved to hold.
Plan the installation and check local rules
A recessed TV cable-management box sits within the wall cavity and provides an orderly place for specified connections or cable ends. Its listing and instructions define how it may be installed. Local building and electrical rules also apply, and the adopted code edition or local amendments can differ.
Before buying a kit, check both sides of the wall if possible. Look for studs, electrical wiring, plumbing, insulation, fireblocking, and signs that the wall is part of a fire-rated assembly. A stud finder helps locate framing, but it cannot confirm every hidden service. Use other inspection methods, such as an existing opening, when available.
Choose a listed product made for in-wall TV cable management. Read its installation instructions before marking the wall. Confirm the approved wall orientation, opening size, cable types, mounting method, power rating, and whether the kit has separate power and low-voltage compartments.
The National Electrical Code (NEC) and model building codes such as the International Residential Code (IRC) provide relevant requirements. The locally adopted rules govern. A product’s listing and instructions are also central to a safe installation. If the wall is fire-rated, or the work may affect framing, ask the local building department or a qualified electrician before cutting.
Next step: Pick the product only after you know the wall type and the cables or power components it must accommodate.
Choose the right recessed box and power method
A low-voltage box holds communications or signal cables, such as HDMI or Ethernet. A power-relocation kit is a listed system designed to bring approved power connections to the TV location. These functions are not interchangeable, and some products provide separate compartments for each.
| Installation need | Suitable approach | Important check |
|---|---|---|
| HDMI or Ethernet only | Listed low-voltage recessed box | Confirm the cable types and fittings are allowed |
| TV needs a nearby outlet | Listed in-wall power relocation kit or a properly located receptacle | Follow the kit’s voltage, load, and connection limits |
| Power and signal cables meet at the wall | Listed divided assembly or another method permitted by the adopted code | Keep separation as required by the product and code |
| TV has an ordinary factory power cord | Plug it into an approved receptacle | Do not conceal the flexible cord inside the wall |
Keep the TV’s factory cord, an extension cord, and a power strip out of the wall cavity. Flexible cords are not a replacement for approved in-wall wiring or a listed power relocation system. If you need power at the TV, use a kit specifically designed and listed for that purpose, or have a suitable receptacle installed.
Do not guess a product’s power limit from its size or appearance. Check the rating in the instructions, and do not exceed it. Some assemblies also have rules about which power components they can contain.
Next step: Match the kit to the actual cable and power arrangement, not just the size of the opening.
Check the cavity, framing, and clearances
Wall framing supports the building, and cutting it to fit a box can create a structural problem. The box opening should fit between framing members without cutting or notching a stud. If the proposed location conflicts with framing, choose another location or ask a qualified professional about options.
IRC R602.6 generally limits bored holes to 40% of a stud’s width. A limit of 60% may apply to nonbearing studs, and has conditions for bearing studs, including rules about doubled studs and successive affected studs. Notches are generally limited to 25% of stud depth in bearing walls and 40% in nonbearing walls. These are model-code provisions; confirm the locally adopted requirements before work.
Wiring and pipes also need protection from screws and nails. Under IRC R602.6.1 and NEC 300.4(A)(1), where a cable or pipe is less than 1¼ inches from the framing member’s edge, protection is typically required. This is often a steel plate at least 1/16 inch thick, or an approved equivalent.
A junction box is an enclosure where wiring connections are made. NEC 314.29 generally requires junction boxes to remain accessible without removing building finish or structural parts. Do not bury a box, splice, or access cover behind drywall or fixed trim.
Next step: If the opening cannot fit without cutting framing or hiding a connection, stop and revise the layout.
Install the box step by step
A careful installation starts with a clear view of the work area and the kit’s instructions. The exact steps vary by product, so use the manufacturer’s specified opening, fittings, and mounting method rather than treating all recessed boxes alike.
- Make the area safe. De-energize nearby circuits as appropriate. If you are unsure which circuit supplies a wire or receptacle, stop and get help from a qualified electrician.
- Inspect the wall. Locate studs and check for concealed wiring, plumbing, insulation, and fireblocking. Inspect from the other side where possible. Do not cut until you have a clear route and the whole opening fits the intended space.
- Mark the opening. Use the template supplied with the kit, if provided. Check the box orientation and required separation between power and low-voltage sections.
- Cut only the specified opening. Do not enlarge it by cutting or notching a stud. If you uncover an unexpected cable, pipe, or barrier, stop and reassess.
- Mount and route. Fasten the assembly to framing or its approved mounting system. Use the listed openings and fittings. Protect cables from sharp edges, and install required nail plates where wiring or piping is too close to a framing edge.
- Finish and inspect. Fit covers and devices as instructed. Keep junctions accessible, and do not cover openings or access panels. Restore required fireblocking or fire-rated construction using approved materials.
Power and low-voltage wiring may need separation under the adopted NEC, including Article 725.136. A divided, listed assembly can provide separation when installed as instructed, but do not assume that putting both cable types in an open wall cavity is allowed. Confirm the method permitted for the specific kit and installation.
Next step: Before closing or finishing the area, verify every connection and cover remains reachable as required.
Check heat, ventilation, and fire protection
A recessed box is not automatically a ventilated enclosure. A tight wall cavity can trap heat from a power supply or adapter. Use only equipment approved for that location and installation, and follow the manufacturer’s ventilation instructions. There is no universal code-prescribed airflow rate, or CFM, for a passive cable box.
Do not place an adapter, power supply, or other heat-producing device in the box unless the product instructions allow it. Do not seal over ventilation openings that the manufacturer says must remain clear. If the instructions do not clearly allow a component in the wall, keep it outside or ask the manufacturer or a qualified installer.
Fireblocking limits the movement of air through concealed spaces. A recessed opening can affect that protection, and a fire-rated wall may need specific materials and methods to preserve its rating. Do not assume ordinary patching compound is an approved repair for every wall assembly. Get approval before cutting a rated wall or changing its construction.
Next step: Confirm the kit’s heat, fire, and ventilation requirements before placing power components inside the wall.
Installation scenarios: choose a safe layout
These examples are illustrative layouts, not reports of specific customer jobs. They show how wall conditions can change the best choice. I use this kind of check before cutting because a clean-looking location is not useful if the cavity cannot safely support it.
Scenario 1: Clear space between studs. A low-voltage box is planned for HDMI and Ethernet, and inspection shows the opening fits between studs with no visible services in the route. A listed low-voltage assembly may suit this setup. The installer still checks cable types, mounting instructions, and separation rules if power wiring is nearby.
Scenario 2: The preferred spot overlaps a stud. The box outline crosses framing. Cutting the stud is not a quick fix; framing limits apply, and the box may not be installed as intended. The safer choices are to move the box or seek professional advice on a compliant alternative.
Scenario 3: TV power is needed at the display. The TV’s factory cord is too short to reach an existing receptacle. Rather than hiding that cord or an extension cord, use a listed in-wall power relocation kit or have a suitable receptacle installed. Check the kit’s rating and connection method.
Scenario 4: A rated wall or hidden service is found. The proposed opening is on a wall that may be fire-rated, or inspection reveals plumbing or wiring. Stop before cutting. Confirm the assembly requirements and safe route with the relevant authority or a qualified professional.
Next step: Treat unexpected wall conditions as a reason to pause, not as an invitation to improvise.
Final inspection before powering the TV
A tidy finish should not hide a mistake. Before energizing the system, compare the installation with the product instructions and check each connection and cover. Make sure the cables are not pinched, the covers can be removed, and no junction or required access point has been concealed.
Use this checklist:
- The box is listed for its intended use and installed in its approved orientation.
- The TV’s factory power cord, any extension cord, and any power strip remain outside the wall.
- Power and low-voltage wiring have the separation required by the kit and adopted code.
- The load, voltage, cable types, and connection method match the product rating.
- Required nail protection is in place, and framing was not cut beyond applicable limits.
- Junction boxes and access covers remain accessible.
- Any ventilation openings stay clear, and fireblocking or rated construction has been properly addressed.
If a connection, rating, or wall condition is unclear, do not energize the setup until it has been checked by a qualified electrician or the appropriate local authority.
Next step: Keep the product instructions and any inspection details with your home records.
Frequently asked questions
These short answers cover common decisions when fitting a recessed TV box. The exact requirements depend on the kit, the wall, and local code. When instructions or local rules differ from a general guide, follow the applicable product listing and local requirements.
Can I put my TV’s power cord inside the wall?
No. Keep the factory cord, extension cords, and power strips out of the wall. Use a listed power relocation kit or a properly installed receptacle.
Can a recessed box hold HDMI and power wiring together?
Only when the listed assembly and installation method allow it, with separation required by the kit and adopted code. Do not assume an open shared cavity is permitted.
Do I need a listed kit?
Use a listed, purpose-made assembly and follow its instructions. A general-purpose low-voltage box does not automatically provide a safe way to route power.
Can I cut a stud to make the box fit?
Do not cut or notch framing simply to fit a box. Code limits apply, and the right choice may be to move the opening or consult a qualified professional.
How close can a cable be to a stud edge?
Where a cable or pipe is less than 1¼ inches from the framing edge, nail protection is typically required under the cited model-code provisions. Check local rules and use the required approved protection.
Can I cover a junction box with drywall?
No. Junction boxes must remain accessible under NEC 314.29. Do not bury a box or access cover behind finish materials.
Does every recessed box need ventilation?
Not necessarily. Follow the product instructions and use only equipment approved for that location. Do not assume a box is ventilated or invent an airflow requirement.
Can I install a box in a fire-rated wall?
Do not cut first. Confirm approval and the required method for preserving the wall’s fire protection with the local authority or a qualified professional.
What if the wall cavity contains insulation?
Check the kit instructions for permitted wall conditions and clearances. Do not compress or remove insulation unless the product and applicable rules allow it.
When should I hire an electrician?
Get qualified help if the work involves power connections you are unsure about, concealed services, altered framing, a rated wall, or unclear code or product requirements.
(This article was written by one of our staff writers, Michael Holloway. Visit our Meet the Team page.)
