First Number : Protection against solid objects. | IP | Protection | Example | | 0 | No Protection | Non protected | | 1 | Full penetration of 50mm diameter sphere allowed. Contact with hazardous parts is not permitted. | Back of hand | | 2 | Full penetration of 12.5mm diameter sphere not allowed. The test finger shall have ample clearance from hazardous parts. | Finger | | 3 | A 2.5mm diameter probe shall not penetrate. | Tool | | 4 | A 1mm diameter probe shall not penetrate. | Cable | | 5 | Limited ingress of dust permitted (no harmful deposit). | Cable | | 6 | Totally protected against ingress of dust | Cable |
Second Number : Protection against liquids. | IP | Protection | Example | | 0 | No Protection | Non protected | | 1 | Vertically falling drops of liquid. | Vertical dripping | | 2 | Vertically falling droplets of water with the enclosure tilted 15 degrees from the vertical | Driving rain | | 3 | Protection against spray to 60 degrees from the vertical. Limited ingress acceptable. | Limited spraying | | 4 | Protected against water splashed from all directions. Limited ingress acceptable. | Splashing from all directions | | 5 | Protected against low pressure water jets from all angles. Limited ingress acceptable. | Hosing jets from all directions | | 6 | Protection from strong jets of water (for use on ship decks). Limited ingress acceptable. | Strong jets from all directions | | 7 | Protected against immersion between 15cm and 1m | Temporary immersion | | 8 | Protected against long periods of immersion under pressure. | Continuous immersion |
|