Hide Fuse Box Cables (Wall Trunking Enclosure)
To conceal fuse-box cables, cover only the cable route with a listed, compatible surface raceway, while leaving the panel face, labels, handle, door and required work space clear. Check the locally adopted electrical code before planning the route. Keep junctions accessible, protect cables from fasteners, and ask a qualified electrician to review any wiring changes.
You notice it every time you enter the room: a neat wall interrupted by exposed cables running to or from the fuse box. A surface raceway, often called wall trunking, can tidy that route without hiding the equipment itself. The key is to plan around access and code requirements, not simply cover what looks untidy.
Plan the Cable Route and Confirm the Applicable Code
A surface raceway is a listed enclosure designed to contain wiring along a wall. Before choosing one, identify the panel, cable type, route, wall construction and local code rules. The aim is to conceal only the route, without disturbing conductors or covering junctions.
In the United States, check the locally adopted National Electrical Code (NEC) edition and amendments with your authority having jurisdiction (AHJ), the local body responsible for code decisions. Relevant provisions may include NEC 110.26 for working space, 312.8 for wiring space in enclosures, 314.29 for box access and 300.4 for cable protection. Requirements can vary by edition and local adoption.
Start with a survey. Identify whether the equipment is a fuse box, circuit-breaker panel or another type of enclosure. Trace where visible cables begin and end, and note every box, splice and opening along the route. Do not pull, cut, splice or move conductors to make the layout work. Have a qualified electrician identify wiring that must not be disturbed.
Next, inspect the wall. Note the material, thickness, framing and likely hidden services. A cable route that looks simple on the surface may pass near concealed wiring or a junction box. Before drilling or fastening, locate hidden services and follow the raceway and cable requirements for protection.
Mark the proposed route and panel limits before buying materials. Record the panel door swing, labels and access points, then compare the route with the required clearances. If the route would enter a restricted area, ask the electrician or AHJ to review it before installation.
Preserve Panel Access and Required Clearances
The panel must remain usable after the cable cover is installed. Its deadfront, operating handle, labels, door and required working space must stay clear. A slim chase can still cause a problem if it intrudes into the space needed to work at or open the equipment.
For equipment up to 600 volts, NEC 110.26(A)(1) generally sets working-space depth at 3 feet for Condition 1, 3.5 feet for Condition 2 and 4 feet for Condition 3. The right condition depends on factors such as voltage to ground and what is opposite the equipment. Do not select a depth by guesswork; check the applicable table in the adopted code edition.
The working-space width must be at least 30 inches or the equipment’s width, whichever is greater. Its height must be at least 6.5 feet or the equipment’s height, whichever is greater. The space must also allow the equipment door to open at least 90 degrees. Measure from the equipment as the code requires, and confirm any detail with the AHJ or a qualified electrician.
NEC 110.26(E) also addresses dedicated equipment space directly above the panel. In general, this space extends from the equipment to 6 feet above it or to the structural ceiling, whichever is lower, across the equipment’s width and depth. Do not run a new trunking enclosure through this area without approval.
These rules concern access and equipment space, not a general need to leave room for airflow around a typical closed panel. There is no universal CFM ventilation requirement for such a panel. Do not add vents or enclose the panel face as a substitute for checking its listing and access needs.
A common planning error is to treat a shallow decorative chase as harmless because it projects only a little from the wall. Its position can still reduce working depth or enter dedicated space. Mark the clearances on the wall before setting the route.
Install Listed Trunking and Finish the Wall
Listed trunking is a surface raceway tested for an intended use. Its listing, fittings and instructions determine how it can be used, supported and filled. Select a system that suits the wiring method and location, and have an electrician confirm that the existing conductors may be routed within it.
| Route or condition | Planning check | Suitable next step |
|---|---|---|
| Cable runs along a clear wall | Confirm cable and raceway compatibility | Use listed trunking with matching fittings |
| Route is near the panel | Check working and dedicated equipment space | Move the route or seek electrician/AHJ review |
| Route crosses a junction box | Confirm the box remains accessible | Keep its cover reachable without removing finish |
| Route passes near framing | Check cable protection rules | Use required setback or approved protection |
| Existing cable type is unclear | Do not assume it can go in surface trunking | Ask an electrician to identify it |
Install the enclosure according to the manufacturer’s instructions. That includes the permitted fittings, support method and fill limits. Do not pack conductors tightly or force the cover closed. If the route needs a splice, additional box or wiring change, stop and have a qualified electrician determine the correct method.
Keep every junction and outlet box accessible. NEC 314.29 generally requires access without removing building finish or structure. A cover that can be removed without damage may preserve access, but a fixed panel, glued trim or wall finish over a box does not. Confirm that the box can be opened and serviced after the decorative work is complete.
Protect cables from screws, nails and other fasteners. Where NEC 300.4(A)(1) applies, cables must generally be at least 1¼ inches from the nearest framing edge. If that setback cannot be met, use the code-compliant steel plate or equivalent protection required for the situation. The electrician should confirm the correct protection before the wall is closed.
For a clean finish, align the trunking with a wall edge, trim line or other clear architectural line where possible. Use compatible corners and end fittings rather than leaving exposed cable at turns. A removable cover can help with future access, but it must not cover panel openings or interfere with the panel door, handle or labels.
Two route-planning examples
These examples show how to assess common layouts; they are not code approvals. Actual requirements depend on the wiring, equipment, adopted code and site conditions.
In a room where cables run down beside a panel, the first question is whether the proposed trunking stays outside the required panel spaces. If it does not, consider a route farther along the wall. Do not solve the conflict by covering the panel face or reducing the space in front of it.
In a renovation where a cable route crosses a wall box, the key question is whether the box will remain accessible. The raceway may need a suitable opening or a revised route, as permitted by its listing and the applicable rules. Do not bury the box behind fixed trim or finish.
Verify Access, Protection, and Compliance
A final check confirms the cover is secure and the equipment remains accessible. Inspect the full route before closing the wall or completing decorative work. If a wiring method has changed, or a clearance is uncertain, ask the electrician or AHJ to verify it first.
Use this sequence:
- Check that the panel deadfront, handle, labels and door are unobstructed.
- Confirm the door opens at least 90 degrees and the required working-space width, height and depth remain available.
- Confirm the trunking does not enter dedicated equipment space unless the AHJ approves the arrangement.
- Check that every junction box can be reached without removing building finish or structure.
- Verify cable protection, raceway support, fittings and fill against the product instructions and applicable code.
- Make sure the raceway cover is secure and does not seal over panel openings or interfere with operation.
If any item fails, pause and revise the route. Do not rely on decorative trim to hide an access problem. Keep product information and any electrician or AHJ guidance with the renovation records.
Conclusion and FAQs
A good cable-concealment plan hides the route, not the electrical equipment. Choose compatible, listed trunking, keep boxes accessible, protect wiring and preserve panel clearances. When the route conflicts with access or code requirements, change the route and get qualified guidance before finishing the wall.
Can I cover the fuse box with a decorative panel?
No. Do not conceal the panel face, deadfront, handle, labels or door. Keep the equipment accessible and preserve the required working space.
Can trunking run beside a fuse box?
It may be possible if it does not obstruct the panel or intrude into required working or dedicated equipment space. Have the route checked against the locally adopted code.
How much space must I leave in front of a panel?
For equipment up to 600 volts, working depth is generally 3, 3.5 or 4 feet, depending on the applicable condition. Confirm the correct value in the adopted code edition.
Does the panel need ventilation openings?
There is no universal CFM ventilation requirement for a typical closed electrical panel. Do not add vents or alter the enclosure without checking its listing and getting qualified advice.
Can I hide a junction box behind trunking?
Only if the box remains accessible as required. A fixed finish that must be damaged or removed to reach the box does not preserve access.
What type of trunking should I use?
Use a listed raceway suited to the wiring method and location, with compatible fittings. Follow its instructions for support and fill, and ask an electrician to confirm the cable is suitable.
Can I drill near the cables to secure the raceway?
Do not drill or fasten until hidden wiring has been located. Follow applicable cable-protection rules, including the required setback or approved protective plate where relevant.
Can I install the trunking myself?
That depends on local rules, the wiring and the work involved. A qualified electrician should assess any conductor changes, uncertain cable type, new junctions or disputed clearances.
What if the trunking would enter the space above the panel?
Do not install it there without review. NEC 110.26(E) sets limits for dedicated equipment space; ask the AHJ or a qualified electrician to assess the proposed route.
Does a removable cover make a hidden box accessible?
Not necessarily. The box must be reachable without removing building finish or structure. Confirm that the cover and surrounding work allow normal access to the box.
(This article was written by one of our staff writers, Michael Donovan. Visit our Meet the Team page.)
