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by Killark 

Catalog ID: 4GCBB-1SP

Killark GCBB Series of Hazardous Location Circuit Breaker Load Centers provide overcurrent and short circuit protection of service entrance, feeder or branch circuits, lighting, heating, appliance and motor circuits. Rated for indoor and outdoor applications, the copper-free aluminum construction is ideal for harsh and hazardous environments. Circuit breaker configurations are available with various Eaton (Cutler Hammer) Type QC Quicklag breakers.

  • Compact rectangular enclosure with threaded cover allows easy access.
  • Provided with four 3/4"-14 NPT drilled and tapped conduit openings, one top and two bottom.
  • Eaton (Cutler-Hammer) Type QC Quicklag Circuit Breakers (These assemblies include the breaker as indicated).
  • Push pull handle mechanism operates circuit breakers.
  • Handle mechanism supplied as standard with "Lockout" in OFF position.
  • Enclosures are made from copper free cast aluminum alloy (less than 4/10 of 1%).
  • Special combinations of breaker amperage are available, consult factory for details.
Suitable for indoor/outdoor use, primarily to provide a degree of protection against rain, sleet and damage from external ice formation.

Product Details


Application Indoor and outdoor hazardous areas where flammable gases or vapors, combustile dusts, or easily ignitable fibers or flyings may be present. Provides overcurrent and short circuit protection of branch lighting, heating, and appliance circuits.
Enclosure Type Threaded
Material Aluminum, Copper Free (less than 4/10 of 1%)
Mounting Type Wall
Number Of Poles 4
Operating Temperature Celcius Max 40 Degree
Series GCBB
Type Circuit Breaker Enclosure
UPC 783936018843


Depth 6.625
Gross Weight with Packaging 12.7
Height 6.875 in
Length 11.5 in
Weight 12 lb
Width 8.125 in

Electrical Ratings

Frequency Rating 60 Hz

Certifications and Compliance

Hazardous Rating(s)
  • Class I, Divisions 1 & 2, Groups B, C, D
  • Class I, Zones 1 & 2, Groups IIB+H2, IIA
  • Class II, Divisions 1 & 2, Groups E, F, G
  • Class III, Divisions 1 & 2
Nema Rating 3R, 7(B, C, D), 9(E, F, G)
UL File Number E83969