Honeywell Switches and Sensors manual Explosion proof switches, Division, Atex EExd Category II

EXPLOSION PROOF SWITCHES

Explosion proof switches

Honeywell explosion proof switches are designed specifically for use in hazardous locations. To comply with explosion proof requirements, the flame path within the housing is designed to contain and cool the escaping hot gases that otherwise could cause an explosion outside the switch.

Switches are available with UL/CSA for North America. See information below and product pages for details. In Europe, the usage is governed under the European Directive on Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres (94/9/EC) commonly referred to as the ATEX Directive.

The BX, CX and GXE product families comply to the following ATEX Directive:

EExd IIC T6 Category II 2 GD

The 14CE100 product family complies to the following ATEX Directive:

EExd IIC T6 Category II 2 G

NEMA TYPE 7, CLASS I FLAMMABLE GASES OR VAPORS

Type 7 enclosures are for use indoors in locations classified as Class I,

Groups B, C, or D by the National Electrical Code.

Group B — (only switches so noted in the order guides include this listing).

Atmospheres containing hydrogen or manufactured gas.

Group C — atmospheres containing diethyl ether, ethylene, or cyclopropane.

Group D — Atmospheres containing gasoline, hexane, butane, naptha, propane, acetone, toluene or isoprene.

Division 1

Locations in which hazardous agents are present under normal operating conditions.

Division 2

Locations in which hazardous agents may be present only in case of accidental rupture or breakdown.

All Honeywell listings covered in Division 1 are also covered in the same groups in Division 2.

NEMA TYPE 9, CLASS II COMBUSTIBLE DUSTS

Type 9 enclosures are for use in indoor locations classified as Class II,

Groups E, F or G, as defined in the National Electrical Code.

Group E — Atmospheres containing metal dust.

Group F — Atmospheres containing carbon black, coal dust or coke dust.

Group G — Atmospheres containing flour, starch or grain dust.

ATEX EExd

EExd	II	c	T6	Category II 2	G	D
Flameproof	Places with potentially	Atmosphere may	Maximum	Areas in which an explosion	Gas	Dust
enclosure	explosive	contain gases	surface	proof atmosphere is likely to	could be	could be
	atmospheres, other	from groups A, B	temperature of	occur	present	present
	than mines susceptible	or C from table in	85 °C (185 °F)
	to fire damp	EN50014, Annex A

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