Answer
Jan 20, 2025 - 07:29 AM
Nidec's statement for c1d2:
VII. Motors & NEC Division 2 Locations
The following provides information on motor application in Division 2 environments. In accordance with NEMA's Safety Standard MG2-6.2.5, our recommendation is to supply a motor approved for Division 1.
In any case, suitability of a motor for use in a Division 2 area is the responsibility of the user and authorities having jurisdiction. This is especially important to note when customers ask for motor in a General Purpose Enclosure as defined below.
General Purpose Enclosure:
For the subject of Hazardous Locations, "General Purpose Enclosure" means any enclosure that is not U.L. Labeled with the Class, Group or Operating Temperature Code called for by the hazardous material in question (not to be confused with the NEMA definitions for "General Purpose" motors).
NEC Requirements for Equipment with General Purpose Enclosures:
In article 500-2(1), the NEC states that exposed surfaces shall not operate at temperatures higher than the ignition temperature of the specific gas/vapor, dust, or fiber/flyings, and that where a General Purpose Enclosure is allowed, the equipment cannot constitute a source of ignition under normal operating conditions.
Equipment can be a source of ignition when sparks or arcs having enough energy are produced or when exposed surface temperatures are greater than the ignition temperature of the material in question.
For Class I (gases/vapors), internal and external, temperatures (NEC-1984 501-8(b) ) and sparking/arcing, have to be considered by the user because the General Purpose Enclosure will not contain explosions of flames, etc., resulting from internal ignitions. For Class II and III (dusts and fibers), internal temperatures and sparking/arcing conditions must be considered in addition to external temperature (which have to be considered in any case) where the enclosure does not suitably impede entrance of the material in question, or impede exit of sparks/arcs.
Should you approve with the above - we can recommend the following: https://usmotor.com/product/x1p2b-1hp...
Hazardous Location Info: Division 1 ~ Class I ~ Group D Class II ~ Group F & G ~ T3B Temp Code
