Browse Store Bus Duct - Busway
Note: Our website may not reflect our full in-stock inventory. If you don’t see what you need, call 1-800-328-1842 for a real-time inventory check and options. “Contact us for price” simply means we’ll quote it to confirm configuration and current pricing - not that it’s out of stock.
Square D I-Line II Bus Duct AP2512G | 1200 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2512G aluminum bus duct; 1200 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2512G
Contact us for pricing:
Square D I-Line II Bus Duct AP2513G | 1350 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2513G aluminum bus duct; 1350 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2513G
Contact us for pricing:
Square D I-Line II Bus Duct AP2516G | 1600 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2516G aluminum bus duct; 1600 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2516G
Contact us for pricing:
Square D I-Line II Bus Duct AP2520G | 2000 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2520G aluminum bus duct; 2000 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2520G
Contact us for pricing:
Square D I-Line II Bus Duct AP2525G | 2500 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2525G aluminum bus duct; 2500 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2525G
Contact us for pricing:
Square D I-Line II Bus Duct AP2530G | 3000 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2530G aluminum bus duct; 3000 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2530G
Contact us for pricing:
Square D I-Line II Bus Duct AP2540G | 4000 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II AP2540G aluminum bus duct; 4000 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: AP2540G
Contact us for pricing:
Square D I-Line II Bus Duct CP2308G | 800 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2308G copper bus duct; 800 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2308G
Contact us for pricing:
Square D I-Line II Bus Duct CP2310G | 1000 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2310G copper bus duct; 1000 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2310G
Contact us for pricing:
Square D I-Line II Bus Duct CP2312G | 1200 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2312G copper bus duct; 1200 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2312G
Contact us for pricing:
Square D I-Line II Bus Duct CP2313G | 1350 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2313G bus duct; 1350 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2313G
Contact us for pricing:
Square D I-Line II Bus Duct CP2316G | 1600 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2316G copper bus duct; 1600 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2316G
Contact us for pricing:
Square D I-Line II Bus Duct CP2320G | 2000 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2320G copper bus duct; 2000 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2320G
Contact us for pricing:
Square D I-Line II Bus Duct CP2325G | 2500 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2325G copper bus duct; 2500 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2325G
Contact us for pricing:
Square D I-Line II Bus Duct CP2330G | 3000 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2330G copper bus duct; 3000 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2330G
Contact us for pricing:
Square D I-Line II Bus Duct CP2340G | 4000 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2340G copper bus duct; 4000 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2340G
Contact us for pricing:
Square D I-Line II Bus Duct CP2350G | 5000 Amp 600 Volt | 3 Phase 3 Wire W/ GRND R&G
Square D I-Line II CP2350G copper bus duct; 5000 amp, three phase, three-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2350G
Contact us for pricing:
Square D I-Line II Bus Duct CP2508G | 800 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II CP2508G copper bus duct; 800 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2508G
Contact us for pricing:
Square D I-Line II Bus Duct CP2510G | 1000 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II CP2510G copper bus duct; 1000 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2510G
Contact us for pricing:
Square D I-Line II Bus Duct CP2512G | 1200 Amp 600 Volt | 3 Phase 4 Wire W/ GRND R&G
Square D I-Line II CP2512G copper bus duct; 1200 amp, three phase, four-wire with ground, 600 volt. Reconditioned and guaranteed with a one year warranty.
SKU: CP2512G
Contact us for pricing:
When your busway run needs a section replaced or extended, you need a supplier who can pull the right piece today. EMSCO stocks over 25+ miles of bus duct across all major manufacturers and families, in both copper and aluminum, plug-in and feeder styles, and legacy series that are no longer manufactured.
Shop by Family — Quick Start
If you already know your system, use the Series filter above to narrow fast. These are the families we see most often for replacements, run extensions, and emergency calls:
- General Electric — Armor-Clad, Spectra & Spectra Low Amp, FVK
- Square D — I-Line I & II, Round Bar
- Siemens / ITE — Sentron & Sentron Low Amp, XJ-L, XL-U, XL-X
- Cutler-Hammer — CP-2 / CP-4
- Cutler-Hammer / Westinghouse — ST / CST 100 Amp
- Other brands — call us: Arrow Hart, Federal Pacific, Continental / Crouse-Hinds
Not sure what series you have? Send photos of the nameplate and joint connections — details below. We'll confirm before you commit to an order.
What You Can Source Here — Fast
- Copper and aluminum bus duct
- 3-wire and 4-wire
- Plug-in and feeder bus duct sections
- Broad amp range — 100A to 5000A depending on series
- Legacy and obsolete series — if it ran power in an industrial facility in the last 70 years, there's a good chance we have it
- Matching tap boxes, elbows, T-sections, end caps, and joint packs to complete the run (see Accessories)
How EMSCO Helps You Win the Day
Legacy & Obsolete Systems Are Our Niche
We regularly support GE Armor-Clad, Square D I-Line, Siemens Sentron, ITE/Bulldog, Cutler-Hammer, and other older lines — exactly the stuff that's "not available" through normal channels.
Complete Runs, Not Just One Piece
Need more than a single section? We can help build out a full run, including the accessories you'll wish you'd ordered up front. Don't get halfway through an install short an elbow.
Fast Match Help
When series compatibility, conductor material, wire/ground configuration, and section length all matter, we help you confirm the exact fit before the order ships.
Speed Up the Match — Photos Work
If you want the fastest "yes, that's the one," send what you have. Even incomplete info helps:
- Series name and part number (if visible on the label)
- Amperage and voltage rating
- Wire/ground configuration (3W, 4W, with or without ground)
- Conductor material (copper or aluminum)
- Section length (if known)
- Photos of the nameplate/label, the joint/connection ends, and a side profile shot
Pro tip: A clear photo of the nameplate and a close-up of the connection end will often get you a confirmed match in minutes — faster than any email back-and-forth.
Refurbished Standards — What "R&G" Means Here
- Inspected for condition, configuration, and conductor integrity
- Cleaned and checked for safe, reliable operation
- PEARL-certified — meets Professional Electrical Apparatus Reconditioning League standards
- Tested and backed by a 1-year warranty
Avoid the Wrong Order
- Series compatibility matters: Bus duct sections and bus plugs must match the same series. Armor-Clad duct takes Armor-Clad plugs — mixing families causes fit problems every time.
- Copper vs. aluminum matters: These are not interchangeable within an existing run. Know what your system uses before ordering.
- Plug-in vs. feeder matters: Plug-in sections have openings for bus plugs; feeder sections don't. Confirm which type you need before placing an order.
- Wire/ground configuration matters: 3-wire and 4-wire sections are not the same. Ground bars add a fifth conductor — confirm your system's configuration.
Completing the Job — Not Just the Duct
If you're replacing a run, extending capacity, or getting a system back online, the duct sections are only part of what you need. We can help you source the related pieces that keep the project moving:
- Bus Plugs — breaker and fusible styles for the same series
- Tap Boxes & Accessories — end feeds, center feeds, elbows, T-sections, joint packs, and hardware
Need It Now?
Call our 24-hour emergency line or send us what you have — we'll confirm fit, condition, and availability in real time.