Track busway is an overhead power-distribution system with a continuous access slot for compatible plug-in devices. Enclosed busbars carry electricity along the track; tap-off units, outlet boxes, and drop cords bring power directly over equipment and workstations.
The track provides the power path. The plug-in devices determine where equipment connects.
See Track Busway Come Together
Watch a T225 run being suspended, joined, fed, and fitted with plug-in tap-off units.
How Track Busway Works
- A feed supplies the run. A compatible feed connects the building's electrical supply to the track.
- Busbars carry power overhead. Insulated conductors inside joined track sections distribute electricity along the route.
- Plug-in devices deliver power. Compatible tap-offs connect along the open slot to supply receptacles, drop cords, or other approved devices.
When equipment moves, its power connection can be repositioned along the existing run. That can reduce the new conduit and wire pulls needed for a layout change.
Connection locations and changes must follow the selected system's ratings, compatible components, and installation instructions, including de-energization where required.
Main Parts of a Track Busway System
Runs & supports
Straight track sections form the route. Joiners connect adjoining lengths, hangers support the track, and end caps close the ends.
40A runs and componentsFeeds
Feeds bring power into the run. Their number and location depend on the layout, loads, system configuration, and electrical design.
40A feed optionsTap-offs & power drops
Compatible plug-in devices take power from the track to equipment through receptacles, drop cords, or other connections.
Tap-off selection guideRows, rectangles, and grids
A row follows a line of equipment or workstations. Coordinated runs can form rectangle or grid layouts to serve a larger work area. The feed arrangement, crossings, and connections must be planned for the chosen system; the layout shape alone does not determine electrical capacity.
Track Busway vs. Other Power-Distribution Systems
Track busway is a form of plug-in busway. Its distinguishing feature is continuous access along the slot, rather than a series of fixed tap-off windows.
| System | Where power connects | When layouts change |
|---|---|---|
| Track busway | Compatible plug-in devices connect along a continuous access slot. | Devices can be repositioned at approved locations along the existing run. |
| Fixed-window plug-in busway | Tap-off units connect at factory-provided openings. | New connections must align with available compatible openings. |
| Feeder busway | Primarily connects major equipment or distribution points. | Changes concern the main power route rather than frequent equipment outlets. |
| Cable and conduit | Field-installed conductors feed wired outlets or equipment connections. | A new equipment location may require changes to conduit, wiring, or outlet positions. |
Is bus duct different from busway? The terms commonly overlap. “Bus duct” does not automatically mean fixed-window or feeder-only construction. Our Busway Fundamentals guide explains busway, bus duct, busbars, and conduit.
Compare fixed-window and continuous-access plug-in busway in more detail
USA TrackBusway's 40A and 225A Systems
USA TrackBusway offers two system families. These are our product options; track busway as a category is not limited to these ratings.
40A Track Busway
Steel housing with insulated copper conductors. Review the available single-phase and three-phase configurations, feeds, and compatible plug-in devices for your equipment.
225A / T225 Track Busway
Extruded aluminum housing with insulated copper conductors, rated 225A per phase. Conductor options include Isolated Ground and 200% Neutral where specified and supported.
Available configurations include 120V, 208Y/120V, 240V, 277V, and 480V applications, with systems up to 600V depending on the selected components. Confirm voltage, phase, calculated load, feed arrangement, and tap-off compatibility for the project.
For layouts using 450A splitters, separately fed T225 sections remain rated 225A per phase each. A splitter does not turn one run into a 450A run.
USA TrackBusway systems are Listed to UL 857 Busway Standards. See listing and code information and the product specifications and technical resources for the selected system.
Single-phase specifications (PDF) · Three-phase specifications (PDF)
Where Track Busway Is Used
- Manufacturing and assembly: equipment rows, work cells, tools, and production layouts that change.
- Laboratories: benches, test instruments, and overhead power drops.
- Commercial spaces and studios: workstations, displays, and compatible lighting connections.
- Data centers: rack rows and planned expansion where the selected system meets the electrical requirements.
Where the flexibility helps
The benefit is strongest when equipment positions change but the overhead power route can stay in place. Modular sections can reduce field wiring, and movable connection points can reduce later rework. Savings depend on the installation and the changes actually needed.
For a fixed circuit or a large backbone feeder, another distribution method may fit better. Compare the load, route, environment, and expected changes before choosing a system.
Common Questions About Track Busway
Can a feed be added along the run?
Compatible feeds can be located along a run as the approved layout requires. Feed placement must be coordinated with circuit separation, source, protection, and load calculations. The 3D Configurator illustrates feeds and PowerDrops in a 40A row.
Can plug-in devices be moved after installation?
Yes, compatible devices can be repositioned along approved locations. Follow the manufacturer's procedures and electrical requirements; continuous access is not blanket permission to make changes while energized.
Is Track Busway the same as lighting track or cable tray?
No. Lighting track is intended for its approved lighting system, while cable tray supports cables. Track busway distributes power through enclosed busbars and supports the plug-in devices approved for that system.
Do tap-offs from different systems fit the same track?
Do not assume interchangeability. Match each feed, tap-off, joiner, and accessory to its approved system family and ratings.
See How a Track Busway Layout Comes Together
Build a 40A row in the 3D Configurator and see how feeds and PowerDrops can be placed along the run.
