Typical customer applications that are in Class I, Environments (Flammable Gases and Vapors) include:
- Utility gas plants
- Petroleum refining plants
In the North American marketplace, we use Baldor motors. Baldor uses Underwriters Lab oratories (U.L.) and the Canadian Standards Association (CSA) as certifying bodies to approve and label their electric motors for use in Division based hazardous locations per NFPA70 National Electric Code (NEC) and C22.1, the Canadian Electric Code. Baldor explosion proof motors may be marked with one or more of the following:
Hazardous Area Classifications
Division – defines how often the potentially explosive materials are present during normal operating conditions.
- Division 1: Ignitable concentrations are present all or most of the time
- Division 2: Ignitable concentrations are not likely to be present during normal operation
Classes and Groups – define the type of potentially explosive atmosphere and the specific materials it contains.
- The “T” Code identifies the maximum absolute motor surface temperature that will be developed under all conditions of operation, and is chosen to be below the ignition temperature of the potential explosive material in the hazardous area. Surface temperatures of Baldor Explosion-Proof Motors will not exceed the following UL and CSA maximums under fault conditions.
- UL Listing mark for use in the United States. Products with this mark have been evaluated to U.S. safety requirements.
- CSA Listing mark for use in Canada and the United States. The product is certified to the applicable American and Canadian standards
- CSA Listing mark for use in Canada. The product is certified to the applicable Canadian standards
NEMA UL drives can be fixed or variable speed, direct drive or belt driven, vertical mount or horizontal mount.