Honeywell Switches and Sensors - Manual (Page 57)

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