Bus Duct - Busway

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

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

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