Hide TV Wires Using Pipe (In-Wall Conduit Tubes)
To conceal TV signal cables in a wall, run them through a listed raceway, such as approved electrical nonmetallic tubing (ENT), between accessible openings. Size the pipe for the cables and their connectors, protect wiring where it passes through framing, and restore any required fireblocking. Keep the TV’s factory power cord out of the wall and raceway.
A clean wall should not come at the cost of unsafe wiring or a cable path you cannot service. An in-wall conduit gives signal cables a protected route and makes future replacement easier, but the result depends on planning, the right materials, and local code requirements. I start by checking the route, then confirm that the raceway, cables, and openings suit the wall and the equipment.
Plan the Route and Identify Wall Hazards
A useful route connects the TV opening to a lower opening where signal equipment can be reached, without crossing into an unsafe or restricted space. Before cutting, locate studs and check for wiring, pipes, fireblocking, and other obstacles. Confirm local code requirements and the raceway maker’s instructions before work begins.
I use a stud finder as an initial check, not proof that a cavity is clear. Inspect through existing openings when possible, and use a suitable inspection camera if the route is uncertain. Check both ends of the proposed path. If you cannot identify what is inside the wall, pause and get qualified help rather than drilling blind.
Plan for a straight, serviceable path. A conduit with tight bends can make it hard to pull a cable, especially when its HDMI connector is bulky. Keep the route inside the intended wall cavity; do not send it into a duct, chimney, or other restricted space. Also identify any horizontal or vertical fireblocking that the route would cross.
Before making openings, mark both cable endpoints and the likely conduit route. Consider where the TV mount will sit and whether the lower opening will remain accessible after furniture is moved into place. A box or junction point that needs future service must remain accessible without removing the finished wall, as required by NEC 314.29.
Next step: If you cannot verify the cavity, the fireblocks, or the route around existing services, have an electrician or qualified installer assess it first.
Check Raceway Size, Bends, and Required Separation
A raceway is a tube or channel that protects and routes wiring. Use ENT or another product listed and approved for the specific installation; ENT is covered by UL 1653. There is no single diameter that guarantees every cable and connector will fit. Check the product listing, local acceptance, cable bundle, connector size, and bend limits before choosing.
As a practical starting point, 1-inch trade-size conduit may suit some signal-cable runs. Bulky HDMI connectors may need a 1½- to 2-inch raceway, or a different route. These are planning guides, not code minimums or a promise of fit. Measure the widest connector and test the pull path, including bends, before closing the wall.
| Raceway choice | When it may work | Check before using |
|---|---|---|
| 1-inch trade size | A small bundle with compact connectors | Connector width, cable count, and bend limits |
| 1½-inch trade size | A larger connector or a few cables | Actual internal space and pull path |
| 2-inch trade size | Bulky connectors or a more difficult pull | Wall depth, product approval, and installation instructions |
The listed size is not necessarily the clear inside diameter. Connectors, couplings, bends, and the raceway’s internal shape affect usable space. Avoid choosing a tube based only on cable thickness. A connector may be the part that stops the pull.
Plan separation from electrical power wiring, too. Class 2 and other low-voltage wiring generally must be separated from power conductors. NEC 725.136 has specific exceptions and rules for approved barriers or arrangements, but do not assume that putting both types of wiring in one tube makes it compliant. Keep power conductors out of the low-voltage raceway unless the exact arrangement is allowed by the adopted code and product instructions.
Where a cable passes through a framing member, NEC 300.4(A)(1) generally calls for the edge of the bored hole to be at least 1¼ inches from the framing member’s face. If that clearance is not met, a steel protective plate at least 1/16 inch thick is generally required. Confirm the applicable edition and local amendments.
Next step: Select the raceway only after checking the largest connector, likely bends, framing protection, separation, and local approval.
Install the Raceway and Restore Fireblocking
A sound installation uses listed raceway parts, suitable fittings, and a clear path that follows the manufacturer’s instructions. The openings must allow access to the cable ends, while the conduit must be secured and protected as required for that product. Any fireblocking disturbed during installation must be restored with an approved method.
- Mark and cut the openings. Confirm their position against the TV mount and lower equipment location. Keep openings clear of studs and hidden services. Use a template or low-voltage mounting bracket where suitable for the wall and installation.
- Fit the raceway. Cut it to length as instructed, remove rough edges, and use compatible connectors or bushings. Sharp edges can damage cable jackets. Secure the tube as required by its listing and installation instructions.
- Protect the framing. Keep bored holes at least 1¼ inches from the framing face, or install the required protective steel plate where that clearance is not met. Do not leave cables exposed to screw or nail damage.
- Leave a pull string. Secure a pull string at both ends so it does not slip into the wall. This can help with future cable changes, but it does not make an undersized or sharply bent route usable.
- Restore fireblocking. If the route crosses required fireblocking, restore it with an approved system suitable for that location. Do not leave an open path through a fireblock or alter a fire-resistance-rated assembly without an approved method.
A junction or splice box must remain accessible without removing wall finish. A continuous, unspliced cable run through the raceway helps avoid creating a concealed splice point. If the route requires a box, plan its location so it can be opened later.
Do not treat every wall as a standard interior partition. Fire-resistance-rated walls, shared walls, and other assemblies may have added requirements. If you are unsure whether a wall is rated, or how to restore its fireblocking, stop and check with the local authority having jurisdiction (AHJ) or a qualified professional.
Next step: Before pulling cable, confirm the raceway is secure, its openings are accessible, and any required fireblocking is restored.
Pull Cables and Verify Access and Compliance
In-wall signal cables are designed and marked for use inside building spaces. Use cable with an appropriate in-wall rating for the location and installation, and keep its jacket intact during the pull. Pull gently, avoid tight bends and crushing, and check that both ends remain reachable after the TV and equipment are installed.
First, attach the cable to the pull string in a way that creates a smooth, narrow leading end. Tape the connection so it will not snag at joints or bends, but do not build up a bulky lump. Feed the cable slowly while another person guides it, if possible. Stop if it catches; pulling harder can damage the jacket or connector.
Follow the cable maker’s bend guidance. There is no single bend radius that applies to every HDMI, network, or audio cable. Do not kink the cable, force a connector through a bend, or use the cable to pull the raceway out of position. After the pull, check the full accessible length for crushing, cuts, or other damage.
Before mounting the TV, test the signal path with the actual equipment. Confirm that the cable reaches without strain and that both ends are available for service. Leave enough slack for connection and maintenance, while keeping it controlled inside the accessible openings. If the run will carry more than one cable, label both ends.
The TV’s factory power cord is not in-wall wiring. Do not put it inside the wall or low-voltage conduit, even if it fits. Do not substitute an extension cord or power strip in the wall. For power at the TV, use a properly located receptacle or a listed in-wall power relocation kit installed according to its instructions and local electrical code.
Next step: Test the signal, inspect the cable jacket and endpoints, and confirm that no ordinary power cord is concealed in the wall.
Which Concealment Method Fits the Installation?
An in-wall raceway is useful when you want a protected route for signal cables and may need to replace them later. Surface raceways avoid opening the wall but remain visible. A power relocation kit addresses the separate need for safe TV power; it does not make a factory cord suitable for in-wall use.
| Method | Best suited to | Main limitation |
|---|---|---|
| Listed in-wall raceway | Signal cables between accessible wall openings | Requires a suitable cavity, approved materials, and careful installation |
| Surface raceway | A route where wall cutting is not suitable | The cover remains visible on the wall |
| New receptacle near the TV | A proper power connection at the display | Electrical work may require a qualified electrician or permit |
| Listed power relocation kit | Moving power to the TV location using an approved system | Must be installed as directed and accepted by local code |
Do not use a low-voltage raceway as a shortcut for power wiring. The two jobs have different rules and materials. If you need both signal and power at the TV, plan each route separately and verify the exact permitted arrangement.
Installation Examples: What Changes the Plan?
These examples show how common wall conditions affect the work. They are planning scenarios, not claims that every home has the same framing or code requirements. The actual route, materials, and approval depend on the building and the locally adopted rules.
Interior wall with a clear vertical cavity: A TV sits above a media console, and an inspection confirms a clear path between the two openings. I would check the HDMI connector size, choose an approved raceway that can pass it through the planned bends, and keep the lower opening accessible. I would still verify framing protection and any fireblocking before pulling cable.
Wall with a fireblock or uncertain services: A proposed route meets a horizontal block, and an initial scan suggests wiring may be nearby. I would not drill through based on guesswork. The route needs a safe way past the obstruction, and any disturbed fireblocking must be restored with an approved method. If the cavity cannot be verified, a surface raceway or professional assessment may be the safer choice.
Frequently Asked Questions
Can I run HDMI cables through in-wall conduit?
Yes, if the cable is suitable for in-wall use, the raceway is listed and accepted for the installation, and the route follows local code and manufacturer instructions.
What size pipe do I need for TV wires?
There is no universal size. One-inch trade size can be a practical starting point, while bulky HDMI connectors may need 1½- to 2-inch raceway. Check actual connector dimensions and bends.
Can I put the TV power cord in the conduit?
No. A TV’s factory cord, extension cord, and power strip should not be run inside the wall or low-voltage raceway. Use a proper receptacle or a listed power relocation kit.
Can low-voltage cables share conduit with electrical wiring?
Do not assume they can. Separation is generally required, subject to specific code exceptions or approved barriers and arrangements. Check the adopted NEC and local requirements.
Do I need to use ENT?
No single product suits every wall. ENT is one option, but use only a raceway listed and approved for the installation, and follow its instructions and local code.
Can I leave a cable splice inside the wall?
A splice or junction box must remain accessible without removing wall finish. A continuous cable run through the raceway avoids creating a concealed splice point.
What if a conduit bend makes the cable hard to pull?
Stop rather than forcing it. Check the bend limits, connector size, and route. A larger raceway or a straighter path may be needed.
Can I install the raceway in a fire-rated wall?
Do not assume a standard method is acceptable. Fire-resistance-rated assemblies may have special requirements. Confirm an approved approach with the local AHJ or a qualified professional.
How do I protect cables where they pass through studs?
Keep the edge of a bored hole at least 1¼ inches from the framing face, or use the required steel protective plate when that clearance is not met, subject to the adopted code edition.
Do I need a pull string?
A pull string is a useful way to support future cable changes. It does not replace a properly sized raceway or a route with suitable bends.
Final Checks Before Mounting the TV
A successful in-wall cable route is accessible, protected, and sized for the actual cables and connectors. Check local rules, use approved raceway, keep power cords out of the wall, and restore any required fireblocking. Before finishing, test the signal and confirm that the cable ends remain reachable for service.
(This article was written by one of our staff writers, Michael Holloway. Visit our Meet the Team page.)
