800 A to 5000 A “Factory Assembled" Busway Systems (or Components)

Class 5615 / Refer to Catalog 5600CT9101

Standard Straight Lengths

The basic component of a busway system is a straight section with a “joint pak” factory-affixed to one end. Plug-in busway is available in standard lengths of 4, 6, 8, and 10 feet. Feeder busway is available in lengths from 16” to 120” in increments of 1”.

Riser Busway

We also offer a “Riser” Plug-In busway with openings on one side only for riser installations. This busway offers the same short circuit ratings as our standard plug-in busway.

Indoor Drip Resistant and IP54 Splash Resistant Busway

These water resistant features are available as an option for indoor plug-in and feeder busway.

Outdoor Construction

Outdoor construction is only available in feeder busway. It prevents the entry of rain and can be installed in any mounting position.

High Short Circuit Bracing

I-Line busway is available with either standard short circuit bracing or high short circuit bracing. Electrical Data for I-Line II Busway lists maximum short circuit ratings for each busway type and rating.


Indoor horizontal busway requires one hanger for every 10 feet of busway. Vertical indoor busway requires one hanger for every 16 feet. Outdoor feeder busway requires one hanger for every 5 feet in horizontal mounting and one hanger for every 10 feet in vertical mounting.


90° elbows are standard. 91° elbows to 179° elbows in 1° increments are also available.


90° flatwise tees fittings are standard. Edgewise tees and crosses are also available.

Indoor Tap Boxes

Feeder cable tap boxes are used at the end (-ETBMB) or center (-CTB) of a busway run and incorporate a short section of busway into their construction. See 5600CT9101 for the length of the tap box.

Plug-in cable tap boxes are plugged into the side of the busway (at any opening except the very last opening of a run).

Lugs other than standard mechanical lugs are available.

Service Heads

Service heads are of outdoor construction and include Square Dbrand standard lugs.

Unfused Reducer

Unfused reducers are used to reduce from a higher amperage busway to a lower amperage.


The National Electric Code does not allow the use of unfused reducers in vertical riser installations. Refer to the NEC for restrictions in industrial installations.

Fused or Circuit Breaker Cubicle

These are used as in-line overcurrent protection devices. They can be used in conjunction with an unfused reducer to offer a device which reduces a run of busway in ampacity and offers overcurrent protection.

I-Line to I-Line II Adapter

This adapter is used to join I-Line II busway (800 A–5000 A) to existing installations of original I-Line busway. If connecting to an existing “slot end” of original I-Line, use a “bolt end” adapter (-12B), and vice versa.

Expansion Fittings

The expansion fitting is built into a 3 ft. – 4 in. straight length for 800 A–5000 A and a 5 feet – 0 inch straight length for 225 A–600 A. Limit of expansion or ­contraction is ±1-1/2 inches. Not available in outdoor construction.

Bussed Transformer Connection

A bussed transformer connection is used when the busway physically attaches (other than cable) to a three phase transformer. For power company vault termination information, consult the factory.

Transformer Taps

Transformer taps are used to make cable connection to transformers. Lugs other than standard Square D brand lugs are available. Note that taps need NOT be located directly above transformers for cable connections.

Connection to Competitive Busway

Consult your nearest Schneider Electric sales office.

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