| Type | Area | Brief Definition |
| 1 | Indoor | General Purpose |
| 2 | Indoor | Protection against angled dripping water |
| 3, 3R, 3S | Indoor/Outdoor | Protection against rain, snow |
| 4, 4X | Indoor/Outdoor | Protection against rain, snow, hose directed water |
| 5 | Indoor | Protection against angled dripping water, dust, fibers, flyings |
| 6 | Indoor/Outdoor | Protection against temporary submersion |
| 6P | Indoor/Outdoor | Protection against prolonged submersion |
| 12, 12K | Indoor | Protection against circulating dust, fibers, flyings |
| 13 | Indoor | Protection against circulating dust, fibers, flyings, seepage |
