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EBMB Explosionproof Circuit Breakers

Crouse-Hinds series EBMB explosionproof circuit breakers provide general control and circuit protection for lighting, heating, appliance and motor circuits in hazardous areas.  They are designed to perform safely and reliably in damp, wet, dirty and dusty locations without the need for a protective shelter.  

The EBMBs clamshell design with a side operated handle allows for reduced footprint and simple confirmation of the internal assembly.

crouse-hinds-ebm-disconnect-switches.jpg

Certifications and compliances

NEC and CEC

  • Class I, Divisions 1 & 2, Groups B, C, D
  • Class II, Division 1, Groups E, F, G
  • Class II, Division 2, Groups F, G
  • Class III
UL standards
  • UL1203 – Hazardous (Classified) Locations
  • UL2062 – High AIC Rating (Interrupting Capacity) for Groups C, D
    • 240V 65,000 RMS Symm. Amperes
    • 480V 50,000 RMS Symm. Amperes
    • 600V 25,000 RMS Symm. Amperes
CSA standard
  • C22.2 No. 30

Environmental ratings

  • NEMA 3, 3R, 4*, 4X†, 7BCD, 9EFG, 12

*Enclosure not suitable for NEMA 4 or 4X with cover mounted operators.

†With S752 or S753 option.

Design features

  • Rugged, corrosion-resistant, cast copper-free aluminum construction (less than 0.4 of 1%)
  • Circuit breaker operating handle located through the right side wall of the body permits visual confirmation of correct component assembly and operation
  • Total compliance to the wiring end room requirements of the National Electrical Code
  • Semi-clamshell enclosure design, with an external flanged ground joint between body and cover, makes interior components more accessible
  • Minimum enclosure-to-enclosure spacing with little interference between the opened cover and an adjacent enclosure
  • Copper-free aluminum hinges allow the cover to swing well out of the way
  • Stainless steel, quick release, captive, hex head cover bolts
  • Stainless steel springs provide clear indication cover bolts are fully retracted from body
  • Versatile, internal operating mechanisms allow for field adjustment to accommodate popular manufacturers' breakers
  • Simple, straightforward installation of breaker on pre-drilled mounting plate within enclosure; mounting plate also field removable
  • Circuit breaker external operating handle can be padlocked in either ON or OFF positions
  • Neoprene cover gasket permanently attached to the cover seals out moisture
  • Bodies have top and bottom drilled and tapped entrances for power conduits and control conduits; removable reducers are supplied, as standard, to accommodate smaller size conduits; all conduit entrances are plugged
  • Tap-on mounting feet
  • Optional EMPS control devices may be added to enclosure cover
  • Steel bracket for lifting larger enclosures during installation supplied as standard

Standard materials

  • Body and cover – copper-free aluminum
  • Operating handle – copper-free aluminum
  • Operating shaft and bushing – stainless steel
  • Interior parts – sheet steel, electrogalvanized
  • Cover bolts, washers and retractile springs – stainless steel
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