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Control stations

EDSX, EDS and EFD Explosionproof Snap Switches

New EDSX series available with NEMA 4X protection for Class I, Division 2 hazardous areas.

EDS/EDSX and EFD snap switches are used with magnetic starters or contactors for control of motors.  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 material and labor costs.

NEMA 4X versions now available!

New EDSX snap switches are designed with an integral gasket that provides NEMA 4X protection against water in the most demanding conditions. Additionally, EDSX switches are enclosed in a factory sealed switch well with double flanges, which mates with the cover and the body.

Certifications and compliances

EDS snap switches:

  • Class I, Divisions 1 & 2, Groups B*, C, D
  • Class I, Zones 1 & 2, IIA, IIB + H2*
  • Class II, Division 1, Groups E, F, G
  • Class III
  • UL standards: UL1203, UL121201, UL508
  • CSA standards: C22.2 Nos. 14, 25, 213-17
  • NEMA 3
  • Operating temperature range: -25°C to +40°C

EDSX snap switches:

  • Class I, Division 2, Groups B, C, D
  • Class I, Zone 2, IIA, IIB + H2
  • Class II, Division 1, Groups E, F, G
  • Class III
  • UL standards: UL1203, UL121201, UL508
  • CSA standards: C22.2 Nos. 14, 25, 213-17
  • NEMA 4X
  • Operating temperature range: -40°C to +55°C

EFD snap switches:

  • Class I, Divisions 1 & 2, Groups 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, 7BCD, 9EFG

*For single-gang enclosures only.  Manual motor starters, circuit breakers and EDS(C)-23 snap switches are not rated for Class I, Divisions 1 & 2, Group B.

Design features

  • Small and compact in design
  • Switches are enclosed in a unique sealing well with double flanges, which mate with the cover and the body (EDS/EDSX only)
  • Small, compact enclosures have accurately ground wide flanges on body, cover and sealing well for flametight joints (EDS/EDSX only)
  • Wiring pigtails are factory sealed from under the sealing well (EDS/EDSX only)
  • Mounting lugs and taper tapped hubs with integral bushings
  • Large captive screws for fastening cover to body (EDSX only)
  • Lockout hole for padlock having 1/4” hasp is provided
  • Threaded type shafts and bushings are used to ensure flametightness

Standard materials

  • Bodies and covers – Feraloy iron alloy or copper-free aluminum
  • Shafts and shaft bushings – stainless steel
  • Sealing enclosures – copper-free aluminum (EDS/EDSX only)
  • Handle – aluminum (EFD only)

Drawings and design support

Specifications
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