Bus Duct & Busway: Product Families
Bus duct, also called busway, carries heavy current through a building in enclosed copper or aluminum bars instead of cable. Feeder runs move power from a transformer or main switchboard to distribution equipment. Plug-in runs have openings along their length where fused or breaker tap-off units connect. Switchboard stub sections join a run to the switchboard it serves.
The ratings that decide a match are continuous current, voltage class, short-circuit withstand, conductor material and housing construction. Sections and fittings are usually specific to one manufacturer series, so buyers of surplus or replacement sections normally ask for the series name and rating first.
24 product families from 8 manufacturers
Feeder
Siemens
Sentron Busway
Sandwich-style busway sold as plug-in, riser and feeder sections; feeder sections carry current without plug-in outlets.
- Rated range
- 225-5000 A (aluminum 225-4000 A, copper 225-5000 A); max 600 V; UL 857 / NEMA BU1
Schneider Electric (Square D)
I-Line Busway
Low-voltage busway in plug-in and feeder types for commercial and industrial distribution.
- Rated range
- up to 4000 A Al / 5000 A Cu at 600 V
ABB
ReliaGear Busway
Listed as current
Custom-built modular busway offered in feeder and plug-in styles, combining Spectra-style busway with Tmax XT breaker plug units.
- Rated range
- up to 5000 A; housing from 4.5 x 4.4 in. for 225-800 A
ABB (GE Spectra Series lineage)
Spectra Series Plug-In and Feeder Busway
Legacy
Plug-in and feeder busway documented in GE-numbered manual GEH-5876, now hosted in ABB's library.
- Rated range
- Instructions cover busway rated 600 V or less; ampacity bands 225-5000 A
Schneider Electric (Square D)
Power-Zone Metal-Enclosed Busway
Custom non-segregated phase bus feeder runs for utilities, municipal and lab sites.
- Rated range
- 600 V to 38 kV, through 6000 A
Eaton
Non-segregated phase bus
Listed as current
Bus conductors and joints run inside a single enclosure, used where cable reliability is not enough; ties to Eaton switchgear.
- Rated range
- up to 6000 A; up to 38 kV; up to 100 kA sym.
Powell Industries
Non-segregated phase bus duct
Listed as current
Non-segregated phase bus for utility, industrial and commercial feeders.
- Rated range
- 600 V to 38,000 V, up to 8000 A
Powell Industries
Cable bus
Listed as current
Metal enclosure carrying fully insulated cable conductors on spacer blocks, used as a heavy feeder.
- Rated range
- up to 38,000 V, up to 5,000 A
Schneider Electric
Canalis KT
IEC-style busbar trunking system for high-power transport and distribution.
- Rated range
- 800-6300 A
Plug-In
Eaton
Pow-R-Way III
Listed as current
Sandwich-style aluminum-housed low-voltage busway fed by polarized bus plugs; indoor, sprinkler-proof and outdoor variants.
- Rated range
- up to 5000 A Cu / 4000 A Al; up to 600 V; up to 200 kA interrupting
Eaton
Pow-R-Flex
Discontinued
Low-ampere aluminum-housed busway with shutter-type plug-in outlets.
- Rated range
- up to 600 A Cu / 400 A Al; up to 600 V; up to 42 kA
Eaton
PowerWave 2
Listed as current
Track-style overhead busway with tool-free tap-off boxes for data centers and light industrial use.
- Rated range
- Ratings not stated
Siemens
Sentron Busway (plug-in sections)
Listed as current
Plug-in sections with reversible openings on 24 in. centers; Siemens circuit-breaker bus plugs 15-800 A and fusible plugs 30-600 A.
- Rated range
- 225-5000 A; max 600 V
Schneider Electric (Square D)
I-Line Busway (plug-in)
Listed as current
Plug-in type of the I-Line system; plug-in units include fusible and breaker versions and tap boxes (e.g. 400-600 A, 600 V).
- Rated range
- up to 4000 A Al / 5000 A Cu at 600 V
Schneider Electric
Powerbus Busway
Listed as current
Lightweight aluminum-housed plug-in busway with copper bars, including a data-center high-density version.
- Rated range
- 100 A, 225 A, 400 A; 600 V
ABB
ReliaGear Busway (plug-in style)
Listed as current
Plug-in style of ReliaGear, with Tmax XT breaker or fused switch plug units.
- Rated range
- up to 5000 A
ABB (GE Spectra Series lineage)
Spectra Series
Legacy
Plug-in and feeder busway; plug installation guidance covers 30-200 A fusible plugs and larger devices.
- Rated range
- busway rated 600 V or less
Legrand (Starline)
T3 Series track busway
Listed as current
Track busway with plug-in tap-offs, copper bars in a full-length insulator.
- Rated range
- 100 or 225 A, 4-pole, 600 V
Legrand (Starline)
T5 Series track busway
Listed as current
Larger track busway tested to UL 857 and IEC 61439-6.
- Rated range
- 250, 400, 600, 800, 1000, 1200-1250 A at 600 V (1200 A system 480 V)
Legrand (Starline)
Series-S (S3/S5) track busway
Listed as current
Industrial-oriented track busway line.
- Rated range
- S3: 100/225 A at 480 V; S5: 250-1200 A at 480 V
Schneider Electric
Canalis KS
IEC-style busbar trunking for medium power with high tap-off density.
- Rated range
- 100-1000 A
Switchboard Stub
ABB (GE Spectra Series lineage)
Spectra Series Evolution Switchboard Stub Connection
Legacy
Busway joint integrated into an Evolution switchboard so Spectra busway bolts directly to the board, top or bottom feed.
- Rated range
- Ampacity bands 225-4000 A aluminum, 225-5000 A copper (from GEH-5660 gasket table)
Siemens
Sentron Busway flanged ends
Listed as current
Flanged ends connect Sentron busway directly to switchgear, switchboards, MCCs and panels; the equipment maker supplies lugs and hardware.
- Rated range
- Sentron 225-5000 A; max 600 V
Schneider Electric (Square D)
I-Line Busway flange end
Flange-end feeder section that bolts to switchboards; example part AF2520G10FEB is 2000 A, 600 V, aluminum.
- Rated range
- 2000 A example; family up to 5000 A Cu
Looking for a specific part?
Tell us the manufacturer, series and rating, or the part number, and ask for a quote. The entries on this page are a reference list, not a stock or price list.
Ratings and lifecycle notes come from the manufacturer pages linked on each entry.
Manufacturer and product names are trademarks of their respective owners and are used only to identify equipment.