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IP Ratings
Table 1 - IP rating 1st digit
IP Rating (1st digit) |
Meaning for protection of Equipment Against Solid Objects |
Tested by | Meaning for Protection of Persons (Protected Against Access to Hazardous Parts) |
0 | No protection | None | No protection |
1 | Solid objects 50 mm | 50mm dia. sphere applied with 50N force. |
Accidental touch by back of hand |
2 | Solid objects 12.5 mm | 12.5 mm dia. sphere applied with 30N force. |
Accidental touch by fingers |
3 | Solid objects 2.5 mm | 2.5 mm dia. steel rod applied with 3N force. |
Accidental touch by tool |
4 | Solid objects 1 mm | 1 mm dia. steel wire applied with 1N force |
Accidental touch by small wire |
5 | Dust-protected (limited ingress, no harmful deposit) |
Dust chamber with or without under-pressure |
Accidental touch by small wire |
6 | Dust-tight (totally protected against dust) |
Dust chamber with under-pressure |
Accidental touch by small wire |
Table 2 - IP Rating 2nd digit
IP Rating (2nd digit) |
Protection against water with harmful effects | Tested by | Meaning for Protection from water |
0 | No protection | None | No protection |
1 | Vertically Dripping | Drip box for 10 min |
Falling drops of water, condesation |
2 | Dripping 15º from the vertical | Drip box 2.5 min per side. | Direct light streams of water up to 15º from the vertical |
3 | Spraying | Oscillating Tube ±60º, 10 min, 10 I/min | Direct light streams of water, upto 60º from the vertical |
4 | Splashing | Oscillating Tube ±180º, 10 min, 10 I/min | Water sprayed from all directions, limited ingress |
5 | Jetting | 6.3 mm dia. nozzle from 2.5 to 3 Meters distance,12.5 I/min for 3 min | Low pressure water jets from all directions, limited ingress |
6 | Powerful Jetting | 6.3 mm dia. nozzle from 2.5 to 3 Meters distance,100 I/min for 3 min | Strong jets of water, limited ingress |
7 | Temporary Immersion | Immersed in tank with water 0.15 m below top and 1 m above bottom for 30 min. | Protected against the effects of temporary immersion in water |
8 | Continuous Immersion | water level and time | Protected against the effects of continuous immersion in water |

