If you're holding an old bus plug with a worn label, the first question is usually simple: what is this plug, and can it be replaced? This bus plug cross reference guide explains how to identify GE Spectra, Cutler-Hammer CP, Pow-R-Way, and other busway plug-in units before you order a replacement. The safest path is not to match by shape alone. Match the manufacturer, busway family, catalog number, amp rating, voltage, device type, stab design, grounding, and enclosure details. We help identify and source new, used, surplus, obsolete, and new-surplus bus plugs when inventory is available.
For immediate sourcing, start with the Circuit Breakers category, the Bus Plugs category if available, and any matching GE Spectra, Cutler-Hammer, Eaton, Pow-R-Way, fusible bus plug, or circuit breaker bus plug product pages where inventory exists.
What a bus plug does
A bus plug, also called a busway plug-in unit or bus duct plug, taps power from a busway run and feeds equipment downstream. In industrial and commercial buildings, bus plugs are common in manufacturing plants, warehouses, data centers, hospitals, schools, and large facilities where flexible power distribution is needed.
The plug may contain a fusible switch, a circuit breaker, a disconnect, a contactor, surge protection, metering, or other control/protection equipment. That is why a bus plug is not identified only by its outside box. The internal device, busway system, stab base, voltage, amp rating, wiring, and enclosure all matter.
Bus plug identification checklist
Use this table before asking for a cross-reference. If one of these details is missing, the replacement may be delayed or misidentified.
What to check | Why it matters | Example |
Manufacturer | Bus plugs are designed around specific busway systems and product families. | GE / ABB, Cutler-Hammer / Eaton, Westinghouse, ITE, Siemens, Square D |
Busway family | The plug must match the busway system it connects to. | GE Spectra, Cutler-Hammer CP2, CP3, CP4, Pow-R-Way, Pow-R-Way III |
Catalog number | The catalog number is the fastest route to a real cross-reference. | Photo of full nameplate or side label |
Amp rating | The amp rating determines plug size and protective-device selection. | 30A, 60A, 100A, 200A, 400A, 600A, 800A |
Voltage | The replacement must match the system voltage and device rating. | 208V, 240V, 277/480V, 600V |
Device type | A fusible bus plug and a breaker bus plug are not the same product. | Fusible switch plug, circuit breaker plug, switch plug |
Stab/base design | The plug connection must match the existing busway. | Do not match by enclosure shape alone |
Ground / neutral setup | Three-wire and four-wire systems can require different configurations. | 3-phase 3-wire, 3-phase 4-wire, 100% neutral, housing ground |
Enclosure type | The environment affects enclosure and installation requirements. | Indoor, outdoor, sprinkler-proof, plug enclosure |
Photos | Photos help confirm the label, handle, mounting, door, stab area, and busway. | Front, side label, inside label, busway nameplate, installed unit |
For product-level sourcing, start with the Bus Plugs / Busway Plug-In Units category, then confirm any matching GE Spectra bus plug, Cutler-Hammer CP bus plug, Eaton Pow-R-Way plug, fusible bus plug, or circuit breaker bus plug product page against the full nameplate.
"A bus plug cross-reference is a starting point, not an approval. GE Spectra, Cutler-Hammer CP, Pow-R-Way, and other busway plug-in units must be matched to the exact busway system, rating, device type, stab design, grounding, enclosure, and label information. Physical fit does not mean UL, code, or AHJ approval. "
How to identify a GE Spectra bus plug
GE Spectra bus plugs are used with Spectra Series busway. The important point is that the plug must match the busway system, not just the general GE brand. GE Spectra busway can include different plug-in unit types, including fusible switch units, breaker-style plugs, contactor plugs, and other configurations depending on the application.
When identifying a GE Spectra bus plug, look for the Spectra name, ABB or GE labeling, catalog number, amp rating, voltage rating, device type, number of poles, wiring configuration, and enclosure details. If the label is worn, photograph the busway run and the plug-in location as well. The busway nameplate can be just as important as the plug label.
If you are sourcing this through JW Electrical Supply, check available GE Spectra bus plug inventory and related GE / ABB electrical distribution parts before treating the unit as unavailable.
How to identify a Cutler-Hammer CP bus plug
Cutler-Hammer CP bus plugs are tied to older Cutler-Hammer busway families such as CP2, CP3, and CP4. Many facilities still have these systems in service, especially in older industrial buildings, plants, warehouses, and institutional facilities. The challenge is that older CP busway systems are not automatically interchangeable with current Eaton Pow-R-Way III plugs.
For this reason, the article should never say that a Cutler-Hammer CP plug has a universal replacement. A CP2, CP3, CP4, Pow-R-Way, or Pow-R-Way III plug must be identified from the busway family, catalog number, rating, stab design, wiring, and equipment label before any replacement path is recommended.
If the unit is Cutler-Hammer CP, compare it with available Cutler-Hammer CP bus plug inventory, Eaton replacement parts, and Pow-R-Way bus plug options before assuming the whole busway must be replaced.
GE Spectra vs. Cutler-Hammer CP: do not cross them directly
GE Spectra and Cutler-Hammer CP are different busway systems. They should not be presented as interchangeable brands. A buyer may search both names because they are comparing old bus plugs, but the article should guide them toward identification, not a direct GE-to-Cutler-Hammer swap.
Bus plug family | What it usually means | Replacement approach | What JW needs |
GE Spectra bus plug | Plug-in unit for GE / ABB Spectra Series busway | Confirm Spectra busway, plug type, rating, voltage, and enclosure before sourcing | Plug label, busway label, catalog number, photos, rating |
Cutler-Hammer CP2 / CP3 / CP4 bus plug | Older Cutler-Hammer busway plug-in unit | Identify vintage busway family and check current Eaton / surplus / obsolete options | CP family, catalog number, busway nameplate, stab photos, wiring details |
Eaton Pow-R-Way / Pow-R-Way III plug | Current or later Eaton busway plug-in platform | May be a replacement path in some Eaton-supported projects, but not a blind swap | Existing busway family, required rating, plug type, neutral/ground setup |
Unknown bus duct plug | Worn label or unidentified plug-in unit | Start with photos and nameplate identification before cross-reference | All labels, installed photos, busway run, measurements, quantity, deadline |
What information to send for a bus plug cross-reference
Before ordering a replacement, collect the information below. This makes the cross-reference faster and reduces the risk of quoting the wrong plug.
- Clear photo of the front label
- Clear photo of the side label
- Photo of the busway nameplate
- Manufacturer name
- Full catalog number
- Busway family or series
- Amp rating
- Voltage rating
- Three-wire or four-wire system
- Ground and neutral configuration
- Fusible switch or circuit breaker plug
- Fuse class and fuse size if fusible
- Breaker type if it is a breaker plug
- Indoor, outdoor, or sprinkler-proof enclosure
- Quantity needed
- Shutdown date or project deadline
During this check, compare the information against available bus plug inventory and any matching GE Spectra, Cutler-Hammer CP, Eaton Pow-R-Way, fusible bus plug, or circuit breaker bus plug product pages.
When an obsolete bus plug can still be sourced
An old bus plug is not automatically impossible to find. Many obsolete bus plugs are still sourced through used, surplus, new-surplus, or reconditioned electrical inventory. This is common for facilities trying to keep a busway system running while they plan a larger upgrade.
Sourcing an original or surplus bus plug may make sense when the busway is still in serviceable condition, the facility needs a fast replacement, the shutdown window is short, or a full busway replacement is not approved yet. In these cases, JW Electrical Supply can help check available options based on the exact nameplate and photos.
When a replacement bus plug may not be enough
Sometimes the bus plug is only one part of the problem. If the busway is damaged, corroded, overloaded, modified, or no longer suitable for the facility, replacing the plug may not solve the underlying issue. In that case, the facility may need an engineered busway repair, transition, modernization, or replacement plan.
A licensed electrician, engineer, manufacturer, or AHJ should review the equipment when the condition of the busway is uncertain. This is especially important for older systems where labels are missing or multiple field modifications have been made.
Get help identifying a bus plug
Have a GE Spectra, Cutler-Hammer CP, Pow-R-Way, fusible bus plug, breaker bus plug, or unknown busway plug-in unit to replace? Send JW Electrical Supply the bus plug label, busway nameplate, and photos. We can help identify the unit and check available new, used, surplus, obsolete, or new-surplus replacement options.
Browse bus plugs and circuit breakers in stock or send us your part number, nameplate photo, and busway details for a quote.
Frequently asked questions
Start with the manufacturer, busway family, catalog number, amp rating, voltage, device type, wiring, ground/neutral setup, enclosure, and photos of the busway nameplate. Do not identify a bus plug by outside shape alone.
No. GE Spectra and Cutler-Hammer CP are different busway systems. A replacement must be confirmed by manufacturer, busway family, catalog number, rating, device type, stab design, grounding, enclosure, and equipment label.
A Cutler-Hammer CP bus plug is a plug-in unit used with older Cutler-Hammer busway systems such as CP2, CP3, or CP4. Replacement depends on the exact vintage system, label information, rating, and available Eaton or surplus options.
Sometimes, but not by assumption. Some old busway systems may have manufacturer-supported transition or replacement paths, while others require used, surplus, or obsolete inventory. The existing busway family and label information must be verified first.
Send the full catalog number, manufacturer, busway family, amp rating, voltage, photos of the plug label, photos of the busway nameplate, device type, wiring setup, enclosure type, quantity, and deadline.
Yes. JW Electrical Supply can help check available new, used, surplus, obsolete, and new-surplus bus plug options when the correct identifying information is provided.