First number – Intrusion against solids
0 No Ingress Protection
1 Protected against solid objects up to 50 mm e.g accidental touch by hands.
2 Protected against solid objects up to 12 mm e.g fingers.
3 Protected against solid objects over 2.5 mm such as tools and small wires.
4 Protected against solid objects over 1 mm such as tools and small wires
5 Protected against dust – limited ingress permitted (no harmful deposit)
6 Totally protected against dust.
Second Number – Intrusion against liquids
0 No Ingress protection.
1 Protected against vertically falling drops of water-limited ingress permitted.
2 Protected against direct sprays of water up to 15° from the vertical-limited ingress permitted.
3 Protected against sprays up to 60° from vertical-limited ingress permitted.
4 Protected against water sprays from all directions-limited ingress permitted.
5 Protected against low pressure water jets from all directions-limited ingress permitted.
6 Protected against strong jets of water e.g for use on ship decks-limited ingress permitted.
7 Protected against the affects of immersion between 15cm and 1m (up to 30 minutes)
8 Protected against long periods of immersion under
9 Protected against close-range high pressure, high temperature spray downs.