T225 busway runs and protected tap-offs suspended above data-center racks; application rendering.

USA TrackBusway applications

Data Center Track Busway Power Distribution

As you add racks or upgrade power distribution units (PDUs), T225’s continuous slot lets you place a compatible tap-off where each rack needs power. Each feed supports up to 225A per phase, with tap-offs available up to 60A per phase. For A/B rows, size each path for the load it must carry if the other goes offline.

Check project timing Explore T225

A/B busway feeds for rack power

Each dual-fed rack takes one connection from busway A and one from busway B. Trace each path back to its source. Two runs fed by the same splitter still share an upstream supply.

Size each independent path for the rack load it must carry if the other goes offline. When you add a rack, account for a tap-off on each run and check the load on each phase.

Separate A and B busway runs with individual cords to four racksSource A feeds busway A. Its four tap-offs A1 through A4 each have a separate cord ending at the A-side PDU input of Rack 1 through Rack 4 respectively. Source B separately feeds busway B. Its four tap-offs B1 through B4 each have a separate cord ending at the B-side PDU input of those same four racks. No cord connects one rack PDU to another, and the sources are not interconnected.Source ABusway A · separately suppliedA1Rack 1PDU AA2Rack 2PDU AA3Rack 3PDU AA4Rack 4PDU ASource BBusway B · separately suppliedB1Rack 1PDU BB2Rack 2PDU BB3Rack 3PDU BB4Rack 4PDU BTwo power paths serving one rackSource A feeds rack 1 PDU A through busway A and tap-off A1. A separate source feeds rack 1 PDU B through busway B and tap-off B1.Source ABusway AA1Rack 1PDU ASource BBusway BB1Rack 1PDU B
Each rack has an A-side PDU and a B-side PDU, each connected to its own busway.
Rack expansion checklist and load record

Expansion review checklist and load record

Illustrative planning sequence for an existing A/B rack row:

  1. Start with the approved layout. Identify the A and B feed sections, existing PDU connections and per-phase load forecast in the approved drawing and load schedule.
  2. Define the change. An added dual-input rack needs a compatible connection on each path. For an equipment upgrade in an existing rack, check whether the PDU input or expected load per phase changes. For a relocated rack, also check tap-off position and cord reach.
  3. Check before release. Assess every phase in normal operation and the required single-path outage against the engineer-established allowable load and margin. Confirm the exact PDU input, connector, feed and tap-off protection, run components, supports and installation requirements. Approve the updated drawing and bill of materials before work.

Keep one expansion record: A/B feed-section IDs; forecast and measured per-phase loads; added-equipment design load; required surviving-path load; allowable load and margin; approval status. Measurements help establish the operating baseline; they do not replace the design forecast or outage assessment.

Use the T225 submittal checklist to coordinate drawings, connectors, monitoring scope, acceptance records and the bill of materials.

Illustrated A/B layout with two existing racks and two future rack additions. Each rack uses two PowerDrops, one from A and one from B; the detached future pair represents one rack.

If connection locations and rack power requirements are expected to stay fixed, compare fixed-window busway. For a backbone or riser, evaluate feeder busway.

Data-center project examples

Server room · Delivered October 2026

Two independent T225 runs for a server room

The customer ordered two 20-foot T225 runs to serve separate A and B rack-power paths. The order included eight PowerTaps and 200% neutral conductors.

The customer received the system on October 28, 2026, 33 calendar days after the September 25 purchase order.

See the order and delivery dates →

Representative overhead busway with tap-off units and power cords above data-center racks; illustration separate from the customer projects described here.
Photo illustration adapted from an original photograph by U.S. Navy / Travis Troller.
The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement.

Critical-power projects · Repeat orders

One project led to two more.

USA TrackBusway supplied T225 busway for a critical-power project. The customer has since placed orders for two additional projects.

Data-center project · Expedited T225 supply

The T225 system was commissioned on schedule

A data-center project needed an expedited busway package. USA TrackBusway supplied two independently fed T225 runs, multi-cord PowerDrops and Schneider feed monitoring, with submittal and installation support.

Project details

Project timeline: Load calculation approved and validated → submittal, delivery and installation support → commissioning confirmed complete.

The data-center project's details, achievement of the required project dates and successful commissioning were confirmed by USA TrackBusway’s project representative. Its load calculation was approved and validated; feed-level measurement points support review of per-phase loading.

The server-room project's 33-day interval runs from purchase order to customer-confirmed receipt, including transit. It is a project-specific result, not a standard production lead time.

Understand the supply and the load

One three-phase busway. Different rack-power connections.

Our T225 three-phase Track Busway serves single-phase and three-phase rack equipment through compatible tap-offs.

One fitting. Three breakers. Three single-phase cords.

One T225 fitting picks up L1, L2, L3 and neutral. Each cord connects one phase to neutral through its own single-pole breaker and includes protective earth. The wye supply determines the single-phase voltage at each cord.

Three independently protected cord circuits

Watch how a T225 tap-off connects →

T225 three-cord PowerDrop with three breaker positions, one for each single-phase cord circuit.

One fitting picks up all three phases + neutral

Gold shows the contacts supplying the three single-phase cord circuits.

T225 fitting with L1, L2, L3 and neutral selected for three single-phase cord circuits.

Choose triple-cord options & review circuit diagrams ↓

Voltage at each cord

208Y/120V supply120V per cord208V between phases
415Y/240V supply≈240V per cord415V between phases

Match each cord’s connector and voltage rating to the PDU input. All three cords share the same upstream supply.

Three-cord circuit diagram and phase planning

Three phase connections share one busway supply. They do not create independent A/B paths or automatically balance loads. Match each output to its PDU input and approved load plan.

On a wye supply, phase-to-neutral voltage is phase-to-phase voltage divided by √3: 415V ÷ √3 ≈ 240V.

Three cords to three separate rack PDU inputs

On a nominal 415Y/240V supply, the three-cord configuration uses one phase-to-neutral circuit per cord. Each cord connects to one compatible single-phase 240V rack PDU input. The example shows three racks; the final allocation follows your equipment and load plan.

Three separate cords from one tap-off to three rack PDU inputsOne busway supplies one tap-off enclosure on a nominal 415Y/240V source. Three single-pole breakers serve three separate cords: Phase A to neutral, Phase B to neutral, and Phase C to neutral. Every cord includes protective earth and ends at one distinct compatible single-phase 240V rack PDU input. The outputs share one source; the rack PDUs are not connected to one another.Nominal 415Y/240V supply · Phases A, B, C + neutral + protective earthONE T225 TAP-OFF ENCLOSUREPhase A1-pole breakerCord 1: A–N + PE240V nominalRack 1Single-phase 240VPDU inputPhase B1-pole breakerCord 2: B–N + PE240V nominalRack 2Single-phase 240VPDU inputPhase C1-pole breakerCord 3: C–N + PE240V nominalRack 3Single-phase 240VPDU inputThree separate cords from one tap-off to three rack PDU inputsOne busway supplies one tap-off enclosure on a nominal 415Y/240V source. Three single-pole breakers serve three separate cords: Phase A to neutral, Phase B to neutral, and Phase C to neutral. Every cord includes protective earth and ends at one distinct compatible single-phase 240V rack PDU input. The outputs share one source; the rack PDUs are not connected to one another.Nominal 415Y/240V supplyPhases A, B, C + N + PEONE T225TAP-OFFENCLOSUREPhase A1-polebreakerCord 1A–N+ PE240VRack 1Single-phase240VPDU inputPhase B1-polebreakerCord 2B–N+ PE240VRack 2Single-phase240VPDU inputPhase C1-polebreakerCord 3C–N+ PE240VRack 3Single-phase240VPDU inputN: neutral PE: protective earth
Connection concept, not an installation wiring schematic. Each line represents a separate cord containing its phase conductor, neutral and protective earth (PE). The three PDU inputs are not joined together. Match breaker ratings, cords and connectors to the approved assembly.

Project example: three protected rack-power connections from one PowerDrop. For a confidential data-center client, USA TrackBusway supplied T225 busway with three-cord PowerDrops for 240V phase-to-neutral rack power. Each PowerDrop provided three individually protected 20A single-pole circuits with NEMA L6-20 receptacles, distributed across the three phases.

Project timeline: A separate customer project supplied with T225 busway and three-cord PowerDrops for 240V phase-to-neutral rack power.

Source note

Project-supplied configuration records; this is separate from the commissioned rack-row project and the general application illustration.

Allocate loads across phases

One output on each phase enables planned load distribution; it does not automatically balance the load. Three connected loads drawing 10A, 16A and 22A still load the phases unequally. Review the forecast and measured per-phase loading as equipment changes.

All three outputs share one busway supply. Phases A, B and C do not create independent A/B power paths; those require separately supplied runs and corresponding PDU connections.

Match the tap-off to your rack PDU

Match voltage, current, connector and circuit protection to the PDU input. Choose an outlet box for the PDU’s own cord, or a PowerDrop to bring the connection closer to the rack.

Receptacle & circuit options → · Choose a T225 tap-off →

How a T225 tap-off connects

Watch the fitting meet the overhead busway before selecting the connection for your rack PDU.

T225 runs support up to 225A per phase, per feed, with compatible tap-offs up to 60A per phase; each assembly retains its marked rating. Review system ratings →

Engineering selection checklist and submittal requirements

Start with the proposed feed and the rack PDU input. Qualify the complete path under the loads it must serve.

Qualify one rack-power path
  1. SourceIdentify the supply voltage and upstream protection.
  2. FeedCheck available fault current at the feed.
  3. T225 sectionCheck each phase under normal and required outage loads.
  4. Protected tap-offMatch branch protection to the rack circuit.
  5. Rack PDUMatch the input voltage, phase and mating connector.

For an A/B design, trace each supply separately. See the A/B rack diagram →

Capacity and growth
Add feeds to separately protected, electrically isolated sections as demand grows; each section retains its rating. If one section needs more than 225A per phase, or one tap-off more than 60A, select an appropriately higher-rated solution. System ratings →
Supply and rack connections
Match the actual source, PDU input, circuit protection and connector. Project-specific 208Y/120V and 415Y/240V builds distribute the supplied voltage; they do not convert it. Supply and PDU guidance →
A/B paths and headroom
Check every phase for normal operation, planned growth and the required single-path outage. A shared splitter does not create independent A/B supplies. A/B planning →
Fault-current rating and installation
Confirm indoor, horizontal installation. Compare the available fault current at the proposed feed with the marked short-circuit current rating (SCCR) and protective-device requirements of the selected assembly. The documented 22 kA SCCR applies to Standard and 200% Neutral (N2) T225 busway with chassis grounding only. Verify each selected tap-off’s own rating. Check model coverage and rating evidence →
Grounding configuration
Match the grounding path from the feed through the busway and tap-off to the PDU. For an isolated-ground run (IG or N2IG), obtain model-specific listing and fault-rating evidence before specifying it. An isolated-ground receptacle also needs a compatible device and grounding path. Compare grounding and neutral options →

T225 IEC 60309 tap-offs are available up to 60A. Send the supply nameplate and complete PDU plug model to match the receptacle or cord connection. Compare IEC and NEMA connections →

What to hand over to operations

  • Approved power path. Supply the one-line drawing, feed and section IDs, tap-off assignments, grounding configuration, and documented assembly ratings.
  • Inspection and commissioning. Record joint inspection and commissioning sign-off, outstanding items, and where maintenance records will be kept. Before inspection or service, qualified personnel must de-energize the busway, follow lockout/tagout procedures, and verify absence of voltage. T225 installation and maintenance manual →
  • Monitoring baseline. Identify which readings come from the feed, tap-off, or PDU. Record initial readings and the agreed alarm checks for the installed equipment. Monitoring and integration guidance →

Use the T225 submittal checklist → · Review the pre-energization checks →

T225 end feed with Schneider display meter for critical power monitoring
CAD view of a T225 feed with a Schneider display meter. Monitoring equipment is selected for the project.

Visibility at the feed and selected tap-offs

Critical power monitoring for rack-row busway

Monitor aggregate loads at the feed; select tap-off or rack-PDU monitoring when you need downstream detail.

Meter choices and BMS, EPMS or DCIM integration

Specify monitoring alongside the A/B layout and rack connections. A Schneider PowerLogic PM5560 meter can measure each phase at a T225 feed; an HDPM6000 head unit with selected busway metering modules can add readings at specified tap-offs. Feed measurements do not identify every downstream equipment load, and rack-PDU outlet telemetry requires separately selected downstream monitoring.

Match the exact meter, modules, firmware and measurement points to the receiving BMS, EPMS or DCIM system. Protocol support alone does not establish software compatibility, alarm delivery or included licenses. See our dated Schneider monitoring and integration summary for the documented interfaces and project checklist.

Explore critical power monitoring

Plan your layout in 3D

Plan T225 rows and feeds for your rack layout, including separate A/B paths where required.

Plan feeds for growth. Add separately fed, electrically isolated sections as rack loads grow. Each section remains rated up to 225A per phase, per feed; a splitter routes power to multiple feeds but does not increase a section’s rating or create independent A/B supplies. Feed and splitter layouts →

200% neutral and grounding options

Select the busway conductor arrangement for the load. Where the design calls for it, evaluate 200% neutral busway lengths with the matched run components. Review standard and isolated-ground paths against the project grounding plan.

Grounding and busway neutral guide →

T225 configurator close-up of the splitter between two end feeds

T225 · 225A

Up to 225A per phase, per feed. Explore run lengths, feeds and compatible connections for your rack rows.

Open T225 configurator →

Match the system to your supply and equipment loads. Need help choosing? Request layout support →

Technical resources for your data-center project

Use these resources to assemble the submittal for your selected system and rack connections.

T225 electrical joiner insert for adjacent busway sections

225A system components

The joiner insert connects the busbars between two T225 sections. Explore it alongside the feeds, couplers and hangers for a row.

Explore T225 components
T225 conductor channels and insulation inside the aluminum housing

ETL listing details

Listed to UL 857 Busway Standards. Standard and 200% Neutral (N2) busway and feeds are included in the T225 listing. Match tap-off receptacles, protection and monitoring to the selected listed build. Intertek Control No. 5011082.

View T225 certification

Data-center busway questions

Start with the voltage and plug your rack PDU needs, then check whether the rack requires independent A/B power paths.

What is data-center busway?

It is an overhead electrical distribution system that carries power along a rack row or equipment zone. Compatible protected tap-offs connect equipment at planned locations along the busway. See our busway fundamentals guide for terminology and applications.

Can T225 serve 208Y/120V and 415Y/240V rack equipment?

Yes, with a project-specific build matched to the actual source voltage, PDU model and load schedule. Not every assembly or meter supports every voltage. Match the selected assembly and meter ratings to the supplied voltage.

Does every rack-power project use the same receptacle?

No. Match the connector’s current, voltage, pole and wire arrangement to the PDU plug and intended circuit. An integral outlet or drop-cord assembly can be selected as part of the project.

Can multiple cords use different phases?

Yes. The illustrated three-cord build uses separately protected A–N, B–N and C–N circuits for compatible single-phase 240V PDU inputs on a 415Y/240V supply. Each cord includes protective earth. Phase allocation does not automatically balance loads or create independent A/B supplies.

How do A/B runs and splitters differ?

A/B runs form separate distribution paths tied to the project’s source and redundancy design. A splitter branches a layout and does not by itself create independent sources or increase a busway section’s rating.

Where does 40A Track Busway fit?

40A Track Busway can serve lighting, support equipment and smaller loads where its ratings fit the application. Use the calculated load, voltage and equipment requirements to select between 40A and 225A systems.

Bring us your rack-power plan

Send your row layout, source voltage, A/B requirements, PDU models and load schedule for a coordinated rack-power plan.