How to buy Explosion Proof Motors? IEC and NEMA
Motors, Explosion Proof
When purchasing IEC Explosion proof motors it is best to communicate in Terms of Markings or Zones.
A Class 1 Div.1 motor is almost always 2G/2D
A Class 1 Div.2 Motor is always 3G/3D
Motor Marking | European & IECEX classification | Definition of zone or division | North American classification |
Not Generally Used | Zone 0 (gases) | An area in which an explosive mixture is continuously present or present for long periods | Class I Division 1 (gases) |
Not Generally Used | Zone 20 (dusts) | Class II Division 1 (dusts) |
2G | Zone 1 (gases) | An area in which an explosive mixture is likely to occur in normal operation | Class I Division 1 (gases) |
| 2D | Zone 21 (dusts) | Class II Division 1 (dusts) |
3G | Zone 2 (gases) | An area in which an explosive mixture is not likely to occur in normal operation and if it occurs it will exist only for a short time | Class I Division 2 (gases) |
| 3D | Zone 22 (dusts) | Class II Division 2 (dusts) |
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