Cut Sheet

Volume 10—Enclosed Control CA08100012E—November 2012 www.eaton.com V10-T9-3
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9.1
Type 7/9 Hazardous Location Starters
NEMA Cast Aluminum Enclosed Starters
Standards and Certifications
Note: See Ta b 17 for additional
information on standards and
certifications that apply to all
enclosed control products.
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UL Classified—Standard
886 File #104565
●
Class I, Groups B, C
and D
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Class II, Groups E, F
and G
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Class III
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Type 4, 4X, 7 and 9
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Zone 1, IIB + H2
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CSA Certified—Standard
C22.2 File #28361
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Class I, Groups B, C
and D
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Class II, Groups E, F
and G
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Class III
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Type 4, 4X, 7 and 9
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Zone 1, IIB + H2
Code Definitions
Class I locations require the
type of explosion-proof
electrical equipment where,
in case of explosion, the
hazardous flames would be
contained. In Class II or III
locations, dust, fibers and
flyings are the combustible
materials and it is only
necessary to keep these
materials out of the electrical
equipment (where an arc may
take place) and to maintain
safe external temperatures.
A brief explanation of the
three classifications covering
hazardous locations follows:
Class I Locations—are those
in which flammable gases or
vapors are, or may be,
present in the air in quantities
sufficient to produce
explosive or ignitable
mixtures.
Class I, Div. 1—are those
where such hazardous
concentrations of flammable
liquids or vapors exist under
normal operating conditions.
Class I, Div. 2—are those
where such hazardous
concentrations of flammable
liquids or vapors are handled
in closed containers or closed
systems.
Class II Locations—are
those where the presence of
combustible dust presents a
fire or explosion hazard.
Class II, Div. 1—are those
where dust is suspended in
the air under normal
operating conditions, in
quantities sufficient to
produce explosive or ignitable
mixtures.
Class II, Div. 2—are those
where such dust is not
normally in the air, but where
deposits of it accumulating on
the electrical equipment will
interfere with safe dissipation
of heat, causing a fire hazard.
Class III Locations—are
those where easily ignitable
fibers or flyings are present
but not likely to be
suspended in the air in
quantities sufficient to
produce ignitable mixtures.
Class III, Div. 1—are those
where ignitable fibers or
materials producing
combustible flyings are
handled, manufactured or
used.
Class III, Div. 2—are those
where easily ignitable fibers
are stored or handled (except
in process or manufacture).
Further refinement created
for the purpose of testing and
approving electrical
equipment divides Class I
into f
o
ur separate
de
signations: A, B, C, D and
Class II into three separate
designations; E, F and G.
Underwriters Laboratories
test and approve electrical
equipment for the following
specific groups:
Class I, Group A—
atmospheres containing
acetylene.
Class I, Group B—
atmospheres containing
hydrogen, gases and vapors
of equivalent hazard such as
manufactured gas.
Class I, Group C—
atmospheres containing
ethyl-ether vapors, ethylene
or cyclopropane.
Class I, Group D—
atmospheres containing
gasoline, hexane, naphtha,
benzine, butane, propane,
alcohol, acetone, benzol,
lacquer solvent vapors or
natural gas.
Class II, Group E—
atmospheres containing
metal dust, including
aluminum, magnesium and
their commercial alloys, and
other metals of similarly
hazardous characteristics.
Class II, Group F—
atmospheres containing
carbon black, coal or coke
dust.
Class II, Group G—
atmospheres containing flour,
starch or grain dusts.
Additional Reference
Cover Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . V10-T9-5
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . V10-T9-13
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V10-T9-18
Accessories and Modifications . . . . . . . . . . . . . . Ta b 1 5
Renewal Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . Ta b 1 6
Technical Data and Specifications . . . . . . . . . . . . Ta b 1 7