and tools, you can rely on the U.S.
Motors
®
brand totally enclosed fan cooled hazardous location motors to meet your needs for
hazardous location applications. Every hazardous location motor is built to contain explosions in-
side the motor casing as well as to prevent ignition outside the motor by containing sparks, flash-
ing and explosions. These rugged motors are ideal for applications typically found in petroleum
and chemical, industrial paint and coating, and grain processing operations.
Hazardous Location Duty
1/2 to 700 Horsepower
56 to 5811 Frame Sizes
2, 4, 6, 8 Poles
Available in 230 Volts up to 6900 Volts
UL Listed and CSA Certified
Single & Dual Label, Division 1 & 2
E10336

LR13009
U.S. Motors hazardous location motors and components
are UL listed and CSA certified under the following file
numbers: Page 2







Hazardous Location Motors
Product Overview
E
mersons team of engineers has applied more than 100 years of motor expertise and its Motor Technology
Centers cutting-edge laboratories to design and test the U.S. Motors
®
brand hazardous location motors. These
motors are specifically designed for:

U.S. Motors
®
brand hazardous location motors carry a one-year minimum warranty on all designs.
Electrical & Mechanical Features

To ensure the motor reliability, long life and superior performance, U.S. Motors
®
brand hazardous location motors
feature the Allguard
®
motor quality system. Each hazardous location motor comes standard with zinc-plated
hardware, regreaseable ball bearings, polyurea grease and a stainless-steel nameplate. Cast-iron inner bearing
caps are found on all motors except the 140 frame. All hazardous location motors are designed to operate in
ambient temperatures of 40 degrees C, in maximum altitudes of 3,300 feet above sea level and with NEMA Design
B torque-current characteristics.
1.0 Service Factor where combustible dusts are present;
1.15 Service Factor where flammable liquids or vapors are present.
Class B temperature rise at 1.0 Service Factor by resistance
Class F insulation materials
Thermal protection on dual label products
Corro-Duty
® corrosion protection on single label products
Insulife 1000, consisting of one dip and bake of 100 percent solid polyester resins, on motors up to 350 horsepower
449 frame and below
One cycle of 100 percent VPI solid epoxy resins on motors above 200 horsepower 5000 frame and higher



PDS 201-113

www.emersonmotors.com Nov 2007
www.usmotors.com
Petroleum and Chemical Applications
Single Label Hazardous Location
Division 1, Class 1, Group D
1.15 Service Factor
Where flammable liquids or vapors are present
Grain Processing Applications
Dual Label Hazardous Location
Division 1, Class I, Group D
Division 1, Class II, Groups F & G
Where combustible dusts are present
1.0 Service Factor, Class F insulation, Class B temperature rise
Can also be used for Petroleum & Chemical Applications as well as
Industrial Paint and Coating Applications
Industrial Paint and Coating Applications
Single Label Hazardous Location
Division 1, Class 1, Group D
1.15 Service Factor
Where flammable liquids or vapors are present Hazardous Location Specifications
Page 3







Hazardous Location Motors
Division I, Class I Flammable Gases or Vapors
Certain locations are hazardous because the atmosphere does or may contain gas, vapor or dust in explosive quantities. The
National Electrical Code (NEC) divides these locations into Classes and Groups according to the type of explosive agent which
may be present. Listed are some of the agents in each classification. For a complete list, see NFPA (National Fire Protection
Association) publication 497M.
Underwriters Laboratories (UL) tests motors and other devices for safety in explosive atmospheres and publishes a list of
those meeting its standards for each Class and Group. Use of UL Listed devices does not necessarily make an installation con-
form to the NEC or local codes. Consult Chapter 5 of the NEC local building codes, OSHA requirements and insurance inspec-
tors for detailed data as to proper procedures.
Gases and vapors are grouped by severity of expected explosion pressure and extent of flame propagation between parts. For
Class I applications, Emerson offers hazardous location products for:
Group C -- ethyl-ether, ethylene and cycle propane
Group D -- gasoline, hexane, naptha, benzene, butane, propane, alcohol, lacquer solvent vapors and
natural gas
Division I, Class II Combustible Dusts
Dusts are grouped by combustibility, penetrability between parts, blanketing effect, ignition temperature and ability to
contribute to creation of an ignition source through abrasiveness or electrical conductivity. For Class II applications, Emerson
offers hazardous location products for:

Group F -- carbon black, coal or coke
Group G -- flour, starch or grain

Temperature
In addition to the identification of the class, group and division, it is necessary to obtain the temperature code or maximum
surface temperature for the hazardous location motor. This code or temperature indicates the maximum surface tempera-
ture for all conditions including burnout, overload, single phasing and locked rotor. The maximum surface temperature, or
T code, must be identified on the nameplate.

All hazardous location motors have a temperature code that defines the maximum allowable frame temperature.
These codes are as follows:




Temperature Identification Numbers
Maximum Temperature (For All Conditions)
T-Code
Celsius
Fahrenheit
280*
536
T2A***
260*
500
T2B***
230**
446
T2C***
215**
419
T2D***
200**
392
T3
180**
356
T3A
165**
329
T3B
160**
320
T3C
135**
275
T4
120**
248
T4A
100**
212
T5
*Class I, Group D only, requires caution statement
** Requires thermostats
***Not applicable to motors for use in Class II locations
PDS 201-113

www.emersonmotors.com Nov 2007
www.usmotors.com Emerson Motor Company
8100 West Florissant Ave.
St. Louis, MO 63136
Phone: 888-637-7333
Fax: 314-553-2087
Options and Accessories
E
merson stocks many U.S. Motors
®
brand hazardous location motors. A sampling of 4-pole dual-label motors are
as follows:
Page 4







Hazardous Location Motors
Many additional sizes and specifications are available and can be found in the Full Line Standard Motor Catalog (FL600)
and NEMA
®
Horizontal Custom Motor Catalog (PB202).
Additional Accessories
Emerson offers the following options on its U.S. Motors
®
brand hazardous location motors:
Premium efficient, Energy efficient and Standard efficient
UL-listed metal breather located near the drain to allow for condensation release
Multiple mounting configurations available for 180 frame sizes and larger




Emerson also offers inverter suitable motors for Class I, Single Label, temperature code T2B applications with
10:1 variable torque, 2:1 constant torque.
When calling, please have the following parameters on hand:
Horsepower and poles
Frequency and voltage
Class and group of all contaminants that will
or may be present in the motors operating environment



Temperature code that defines the motors
maximum allowable frame temperature Emerson, a global leader in the design and manufacture of electrical motors, provides a complete line of general
and special purpose electric motors from 1/200 through 5,000 horsepower. Brands such as Emerson
®
, U.S. Motors
®

and Hurst
®
allow Emerson to support a wide variety of applications including commercial and industrial, appliance,
hermetic, automotive, and HVAC. Emerson (NYSE: EMR), based in St. Louis, is a global leader in bringing technology and
engineering together to provide innovative solutions to customers through its network power, process management,
industrial automation, climate technologies, and appliance and tools businesses.
NEMA
®
is a registered trademark of the National Electrical Manufacturers Association.
PDS 201-113

www.emersonmotors.com Nov 2007
www.usmotors.com
Horsepower
Frame Size
Voltage
Winding Type
Class, Group Available
I,C
I,D
II,F
II,G
1/2-3/4
56
230 / 460
random-wound
X
X
X
1-2
143T-145T
230 / 460
random-wound
X
X
X
3-10
182T-215T
230 / 460
random-wound
X
X
X
15-100
254T-405T
230 / 460
random-wound
X
X
X
X
125-300
444T-449T
230 / 460
random-wound
X
X
X
X
up to 500
5807
460/575
random-wound
X
X
X
X
up to 600
5809-5811
460/575
random-wound
X
X
X
up to 150
5004
2300/4000
form-wound
X
X
X
up to 350
5008
2300/4000
form-wound
X
X
X
up to 400
5807
2300/4000
form-wound
X
X
X
X
up to 500
5809
2300/4000
form-wound
X