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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 eliminates the need for external seals, simplifying installation and reducing costs.

crouse-hinds-eds-efd-snap-switches.jpg

Certifications and compliances

  • 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 standard: UL1203
  • CSA standard: C22.2 No. 30
  • NEMA/EEMAC 3, 7B*CD, 9EFG, 12

*Single-gang – 1P, 2P, 3W, 4W (20A): Factory sealed for Class I, Divisions 1 & 2, Groups B, C, D – no seals required.  Single-gang – 1P (30A), 2P (30A), 3P (10A, 15A), 3W (30A): Class I, Division 1, Groups C, D and Class I, Division 2, Groups B, C, D – seal within 18".  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.

Two-gang – 20A: 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 suffix and install seals within 1-1/2” of conduit openings for self-certification to UL standard.  Two-gang – 30A: Class I, Division 1, Groups C, D and Class I, Division 2, Groups B, C, D – seal within 18".  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 and covers – Feraloy iron alloy (standard); copper-free aluminum (optional)
  • Shafts – stainless steel
  • Shaft bushings – stainless steel

Drawings and design support

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