DC Buyer's Guide

Explosionproof and Dust-Ignitionproof Motors Class F Insulation For Continuous Operation in 40°C Ambient

Purged/Totally Enclosed Separately Ventilated for Hazardous Locations

Type CD Shunt Wound

Class I Section 501-8 of the National Electrical Code permits the use of enclosed separately ventilated motors with air ducted-in, air ducted-out ventilation in Class I, Division 1 or 2 locations when installation and operation conform to certain requirements. Motors must be air-purged with a source of clean air and have the control arranged to prevent energization of the machine, until ventilation has been established and the enclosure has been purged with at least 10 volumes of air. Protective devices such as a thermostat must be utilized on the motor to detect any increase in temperature of the motor beyond the design limits, and the control must be arranged to automatically de-energize the equipment. Motor leads must be sealed at the frame exit (see Section 501-5 of the National Electrical Code). Auxiliary equipment such as a conduit box, tachometer, and other auxiliary devices mounted on the motor must be of the explosionproof type for Division 1 locations. Sealed leads and standard conduit box may be used for Division 2 locations. Class II Section 502-8 of the National Electrical Code permits the use of enclosed separately ventilated motors with air ducted-in, air ducted-out ventilation for use in Class II, Division 1 and 2 locations, provided that the maximum surface temperatures shall not exceed 120°C, (248°F). Auxiliary equipment such as a conduit box, tachometer, and other auxiliary devices mounted on the motor must be of the explosionproof type for Division 1 locations. Sealed leads and standard conduit box may be used for Division 2 locations.

Motor Pricing General Information

Separate ventilation in hazardous locations is not available in CD180AT.

SUMMARY OF MOTOR REQUIREMENTS FOR SEPARATELY VENTILATED MOTORS IN HAZARDOUS LOCATION MOTOR LEADS CONDUIT BOX TACHOMETERS SPACE HEATERS

AUXILIARY DEVICES

Other Information Application Information Outline Dimensions Accessories and Modifications

CLASS I

DIVISION 1

SEALED

XP

XP

LOW TEMP

XP

DIVISION 2

SEALED

STANDARD

XP

LOW TEMP

XP

CLASS II

DIVISION 1

SEALED

XP

XP

LOW TEMP

XP

DIVISION 2

SEALED

STANDARD

XP

LOW TEMP

XP

XP=Explosion proof rated for hazardous location where motor is used

WARNING: Enclosed separately ventilated motors supplied for use in a hazardous location do not have an Underwriters’ listing and are not explosionproof. Articles 501-8 and 502-8 of the National Electrical Code governing the installation of motors in Class I and Class II locations assign approval of the installation to “the authority having jurisdiction” (see Article 100 - Definitions of the NEC). Therefore, it is the responsibility of the customer to be familiar with the NEC and the local jurisdictional requirements, and to determine that the motor selection (including possibly permissible alternative ventilation systems or accessories) is “acceptable to the authority having jurisdiction.”

2.25

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GEP387-EN 07/19 Prices and data subject to change without notice.