ATEX Enclosure

1
ATEX Enclosure

• Examples

2
Class I, Div. 1 Enclosure Installation
ATEX Enclosure Examples

• These are explosion-proof enclosures that require
  sealing fittings per NEC/CEC for junction boxes,
  pull boxes, terminal boxes, or any arcing or
  sparking devices, such as a transformer, circuit
  breaker, PLC, IS barrier,

3
ATEX Enclosure Examples
Class I, Div. 2 Enclosure Installation

• Enclosure Material
• Sheet steel
• Stainless steel
• Non-metallic materials
• Sealing fittings
• On terminal boxes with terminal blocks ONLY, the
  NEC/CEC permits installation WITHOUT sealing
  fittings (see picture).
• Any other arcing or sparking devices WOULD
  require sealing fittings.
• In this example, the brass TMCX cable glands
  (sealing fittings) are required because of small
  transmitters (arcing devices) inside the box.

4
ATEX Enclosure Examples
EEx e (Increased Safety) Zone 1 2 Enclosure
Installation

• Enclosure material
• Sheet steel
• Stainless steel
• Non-metallic materials
• Sealing fittings
• For terminal boxes with terminal blocks ONLY, the
  NEC/CEC permits installation WITHOUT sealing
  fittings.
• Any other arcing or sparking devices WOULD
  require sealing fittings.
• The operators and potentiometers shown are Zone 1
  2 rated, due to sealed contact blocks. As a
  general rule, cable glands are installed for
  enclosure entries.

5
ATEX Enclosure Examples
EEx d IIB (Flameproof) Enclosures for Zone 1
2, 21, 22

• Enclosure materials
• Aluminum
• Iron
• Look very similar to our ejbs
• Thinner wall thicknesses
• Priced at a lower price point
• Testing
• IEC testing requires EVERY enclosure to be tested
  at 1.5 times pressure testing while NEC enclosure
  testing is RANDOM and tested to 4 times
  pressure/hydro testing requirements.
• Product offering
• Group IIB gases (equal to NEC groups C, D).
• Our NEC Group B gas applications are not covered
  with this offering.
• Sealing fittings or cable glands
• Required.
• Drilled and tapped entries are NOT permitted in
  the field.
• Have to be done at the factory
• ATEX assembler.

IIB Enclosures
6
ATEX Enclosure Examples
EEx d IIC (Flameproof) Enclosures for Zone 1
2, 21, 22

• Enclosure material
• Aluminum
• Close to our GUB Series.
• Keep in mind that IEC testing requires
• Testing
• IEC testing requires EVERY enclosure to be tested
  at 1.5 times pressure testing while NEC enclosure
  testing is RANDOM and tested to 4 times
  pressure/hydro testing requirements.
• Product Offering
• Group IIC gases (equal to NEC groups B, C, D).
• Our NEC Group B gas applications ARE covered with
  this offering.
• Sealing fittings or cable glands
• Required.
• Drilled and tapped entries are NOT permitted in
  the field.
• Have to be done at the factory
• ATEX assembler.

IIC Gas Groups