Two types of protection : Solids and Water
Protection From Solids
1 - Protection againsr a solid object greater than 50 mm such as hand 2 - protection against a solid object greater than 12.5mm such as a finger 3 - Protection against a solid object greater than 2.5 mm such as a screwdriver 4 - Protection against a solid object greater than 1 mm such as a wire 5 - Dust protected.Limited ingress of dust permitted.Will not interfer with operation of the equipment.Two to eight hours 6 - dust tight.No ingress of dust.Two to eight hours.
Protection from Water.
1 - Protection against vertically falling drops of water.Limited ingress permitted. 2 - protection against vertically falling drops of water with enclosure tilted up to 15 degress from the vertical.Limited ingress permitted. 3 - Protected against sprays of water up to 60 degrees from the vertical.Limited ingress permitted for three minutes 4 - Protected against water splashed from all directions.Limited ingress permitted. 5 - Protected against jets of water.Limited ingress protected. 6 - water from heavy seas or water projected in powerful jets shall no enter the enclosure in harmful quantities. 7 - Prediction against the effects of immersion in water between 15 cm and 1m for 30 minutes 8 - Protection against the effects of immersion in water under pressure for long periods.