First Number

Meaning

Second Number

Meaning

Refers to protection against solids

Refers to protection against liquids

0

No protection

0

No protection

1

Protected against solid objects over 50mm (e.g. accidental touch by the hand)

1

Protected against water falling vertically

2

Protected against solid objects over 12mm (e.g. accidental touch by the finger)

2

Protected against direct sprays from up to 15 degrees from vertical

3

Protected against solid objects over 2.5mm (e.g tools, wires)

3

Protected against direct sprays up to 60 degrees from vertical

4

Protected against solid objects over 1mm (e.g. small wires)

4

Protected against sprays from all directions. Limited ingress permitted.

5

Protected against dust – limited ingress (no harmful deposit)

5

Protected against low pressure jets of water from all directions. Limited ingress permitted.

6

Totally protected against all dust

6

Protected against strong jets of water. Limited ingress permitted. E.g. acceptable for use on shipdecks.

7

Protected against temporary affects of immersion between 15cm and 1m, for 30 minutes.

8

Protected against long periods of immersion under pressure.