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EDS and EFD Explosionproof snap switches

Crouse-Hinds series EDS/EFD Explosionproof Snap Switches are used with magnetic starters or contactors for remote control of motors.  EDS/EFD snap switch control stations are factory sealed to prevent arcing of the enclosed device from causing ignition of a hazardous atmosphere external to the enclosure.  Factory sealing elimintes the need for external seals, simplifying installation and reducing costs.  

Certifications and compliances

  • Class I, Divisions 1 & 2, Groups B*, C, D
  • Class II, Division 1, Groups E, F, G
  • Class II, Div. 2, Groups F, G
  • Class III
  • NEMA 3, 7B*CD, 9EFG
  • UL Standard: 1203
  • CSA Standard: C22.2 No. 30

*Single-gang: Factory sealed for Class I, Divisions 1 & 2, Groups B, C, D – no seals required.  Two-gang: Factory sealed for Class I, Division 1, Groups C, D and Class I, Division 2, Groups B, C, D – no seals required.  Class I, Division 1, Group B – add suffix GB and install seals within 1-1/2" of conduit openings for self-certification to UL standard.

Design features

  • Factory sealed devices eliminate external seals, reduce installation problems, lower installation costs and improve safety
  • Are used with general purpose snap and pushbutton type switches
  • Standard neoprene covers for front operated pushbuttons; prevents accumulation of dirt and entrance of water around operating shafts
  • Mounting lugs and taper tapped hubs with integral bushings
  • Large machine screws for fastening covers to bodies
  • Lockout provisions on front operated pushbutton (marked "STOP" and "OFF") and selector switch covers
  • Lockout hole for padlock having 1/4" hasp is provided when used with covers for front lever and side rocker type operation
  • Close tolerances in machining of wide, mating flanges and journalled shafts and bearings for front button operation, produces flametightness of enclosure joints
  • On enclosures with front lever and side rocker type operating handles, threaded type shafts and bushings are used to ensure flametightness
  • Dead end (EFS or EDS) or through feed (EFSC or EDSC) hubs – 1/2" to 1" sizes

Standard materials

  • Bodies – Feraloy® iron alloy; copper-free aluminum
  • Shafts – stainless steel
  • Shaft bushings – stainless steel

Drawings and design support

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