Non-Segregated Bus

Class 6090 / Refer to Catalog 5600CT9101

Non-Segregated Bus

  • Non-segregated phase bus

  • 600 V through 38 kV (1200 A–6000 A)

  • Aluminum, steel or stainless steel housing

  • Aluminum or copper bus bars

  • Insulated with fluidized bed epoxy (5 kV–38 kV)

  • Complete line of fittings provides for any configuration

  • Indoor trapeze and outdoor column supports

  • For use in utilities, industrial and commercial facilities

PowerZone™ bus is custom designed, manufactured and tested per ANSI C37.23 standards to meet customer specifications. The 600 V product is also UL Listed. It is a completely coordinated package of equipment with all the auxiliary material and supports for connecting transformers, switchgear, MCCs, and motors, in all types of utility, industrial, and commercial facilities.

Bus Options

Some available options are special momentary rating, special housing material and/or finish, special conductor supports, heaters and ­thermostats, and ground bus.

Weatherproof Bus

All weatherproof runs must be equipped with strip heaters to eliminate condensation and, if applicable, a thermostat. A heater should be used for every seven (7) foot of bus and no more than 20 heaters can be controlled by one thermostat. Also, each bus run should have its own thermostat. The heaters are rated 240 V, 500 watts and operate at 120 V, 125 watts.

Flanged Ends

A flanged end is used to terminate the bus into switchgear, motor control centers, switchboards, or any rigid bus-to-bus connection. It consists of a gasketed equipment flange, up to 1'-0" of 3Ø3W conductor (3Ø4W as applicable), necessary insulation tapes, and required bolting hardware.

Cable Tap Box

A cable tap box includes a gasketed and accessible termination box, lugs, necessary insulation tape (between bus and lugs only), and required bolting hardware. Lug sizes and quantity should be specified by purchaser.

Transformer/Generator Connection

This type of termination should be used whenever the bus is connecting to a transformer, generator, motor, switch or any connection where the bus bars are connecting to porcelain mounted equipment terminals. It will include the same ­components as a flanged end plus one set of flexible braid type ­connectors and a terminal box (if required).

Bushing Box (Weatherhead)

A bushing box is used on service entrance run where the cable connection to the bus must be made via porcelain bushings. It is comprised of the same components as a transformer connection plus 3 through stud type apparatus bushings, bushing stud connectors (lug pads) and a strip heater.

Ground Bus

The bus housing is designed and constructed to provide an electrically continuous ground path. The side rails of the bus housings are capable of carrying the full rated phase current continuously and, under short circuit conditions, are capable of carrying up to 60 kA RMS asymmetrical fault current for 3 seconds. Consequently, a separate ground bus is not necessary unless specified.

Wall Entrance Seal

A wall entrance seal consists of a wall throat, wall flange (one side of wall only), and a barrier which prevents air or vapor from passing from one room to another or from outdoors to indoors. It also carries a 1/2 hour fire rating. Consult factory for higher fire ratings.

Wall Flange


Optional (in addition to wall entrance seal)


 14 Gauge Steel

 14 Gauge 304 Stainless Steel

 14 Gauge 316 Stainless Steel

Equipment Entrance Seal

An equipment entrance seal should be used whenever a barrier is required to prevent the passing of flame and/or gasses between the bus housing and the terminating equipment.

Expansion Fittings

An expansion fitting is used to counteract the strain placed on the bus due to the expansion and contraction of the building or the bus itself. One should be used whenever the bus run crosses a building expansion joint and whenever a straight run of bus exceeds 60 feet.

Flexible Housing (Misalignment) Collar

Required at terminations or wall penetrations when vibrations due to seismic forces may cause damage to the bus. It may also be used to adjust for the “settling” of terminating equipment after installation.

Supporting Steel (Hangers)

Supports should be added on the basis of one for every 10 ft. for indoor and one for every 12 ft. for outdoor. Indoor supports are a trapeze type hanger while outdoor supports are a single or double column type support. Consult factory for other type supports.


Support Description

Maximum Height Options

Indoor Trapeze Hanger

Outdoor, Single

Column Support

12 feet

Outdoor, Double

Column Support

22 feet

Hazardous or Seismic Locations

Consult factory for bus runs which are to be installed in a location which is classified as hazardous or in a seismic location.

Standard Construction

Standard construction is as follows:

  • Conductor (plating): Copper (silver) or Aluminum (tin)

  • Conductor Insulation (5 kV through 38 kV only): epoxy

  • Conductor Supports: Glass reinforced polyester blocks (5 kV and 15 kV); porcelain (38 kV)

  • Housing Material: Extruded Aluminum (1/8-inch Nominal)

  • Housing Construction: Totally Enclosed Non-ventilated

  • Joint Insulation: EPR and PVC tape

  • BIL Rating: 30 kV (600 V), 60 kV (5 kV) and 95 kV (15 kV)

  • Momentary (Short Circuit) Rating: 75 kA (600 V), 60 kA (5 kV, 15 kV), and 39 kA (38 kV)

  • Ground Conductor: Housing (100% rated)

Bus Enclosures

Material and Finish

Painted Aluminum (1/8” Nominal)

Painted 14 Gauge Steel

Painted 11 Gauge Steel

Painted 14 Gauge 304 Stainless Steel

Painted 14 Gauge 316 Stainless Steel

Momentary (Asymmetrical Short Circuit) Ratings

Voltage Class

Ampere Options

600 V

 75 kA

100 kA

125 kA

150 kA

5 kV

15 kV

 60 kA

 80 kA

100 kA

150 kA

38 kV

39 kA

49 kA

62 kA

100 kA

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