EJB Explosionproof Enclosures
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EJB Explosionproof Enclosures

Crouse-Hinds series EJB explosionproof enclosures are designed for hazardous locations to be used as a junction or pull box, to provide enclosures for slices and taps, and for housing terminal blocks, relays and other electrical devices.  EJB enclosures are globally certified for use in worldwide applications.  They are listed for Class I, Division 1 and Class II, Division 1 hazardous areas, and they also have IECEx and ATEX certifications.

Certifications and compliances


  • Class I, Divisions 1 & 2, Groups B, C, D
  • Class I, Zones 1 & 2
  • Class II, Division 1, Groups E, F, G
  • Class II, Division 2, Groups F, G
  • Class III
  • UL1203
  • cUL to CSA standard C22.2 No. 30
  • Enclosure type 3, 3R, 4, 4X, 7BCD, 9EFG


  • EN:60079-0 and EN:60079-1
  • IECEx certificate: IECEx ETL 13.0040U


  • Ex d IIB + H2 T6, IP66
  • ATEX certificate: ITS08ATEX15797U

Design features

  • Style C boxes provided with aluminum plate cover as standard, allowing for field addition of cover device holes
  • Stainless steel cover bolts (Style C only)
  • Ground joint cover opening provides maximum opening for pulling wires or mounting equipment
  • Walls of bodies may be drilled and tapped for conduit entries as shown in listings
  • Stud bolts in diagonally opposite corners of body aid in aligning cover to body during installation (not furnished with hinged covers)
  • All Style C bodies are provided with captive, triple-lead, quick-release hex head stainless steel bolts with spring loaded action which provides clear indication that cover bolts are fully retracted from the body
  • External flange design – wide unobstructed cover opening provides a completely accessible interior for wiring and electrical equipment
  • Square corners of enclosure body provide maximum interior space and area for conduit openings
  • Internal grounding lug provides a means to ground enclosed equipment
  • Special neoprene cover gasket provides a watertight seal to meet NEMA 4 requirements, and provides superior protection for enclosed equipment against water/corrosion
  • Enclosures are machined for field installed mounting plates
  • Detachable mounting feet provide mounting flexibility; no need to replace enclosure if mounting feet are broken
  • Optional stainless steel hinges provide convenient and easy access for inspection, maintenance and systems changes
  • Enclosures are machined to accept field installed hinges
  • IEC rated when ordered with ATEX suffix

Standard materials

  • Body and cover – copper-free aluminum
  • Gasket – neoprene
  • Cover bolts – stainless steel (Style C); steel (Style D)

Drawings and design support