IEC Enclosure Ratings

The IEC enclosure rating always starts with the letters “IP” and ends in two numbers. The first number describes the degree of contact prevention and guarding against foreign objects. The second number describes the degree of water protection.

First No. Degrees of Contact Prevention and Guarding Against Foreign Objects Second No. Degrees of Water Protection
0 No protection of personnel from direct contact with active or moving parts. No protection from access of a solid foreign object. 0 No special protection
1 Protection of personnel from accidental large area direct contact with active or internal moving parts but no guard against intentional access to such parts. Protection from access of solid foreign object larger than 50mm in diameter. 1 Water drops falling vertically must not have any harmful effect.
2 Protection of personnel from finger contact with active or internal moving parts. Protection from access of solid foreign object larger than 12mm in diameter. 2 Water drops falling at any angle up to 15° from the vertical must not have any harmful effect.
3 Protection of personnel from touching active or internal moving parts with tools, wires or similar foreign objects thicker than 2.5mm.. Protection from access of solid foreign matter larger than 2.5mm in diameter. 3 Water hitting the object any any angle up to 60° with the vertical must not have any harmful effect.
4 Protection of personnel from touching active or internal moving parts with tools, wires or similar foreign objects thicker than 1mm. 4 Water splashing against the object from all directions must not have any harmful effect.
5 Total protection of personnel from touching voltage carrying or internal moving parts. Protection from harmful deposit of dust. Access of dust is not completely prevented. 5 A jet of water nozzled from all directions must not have any harmful effect.
6 Total protection of personnel from touching voltage carrying or internal moving parts. Protection from access of dust. 6 Water from a temporary floodings, such as heavy seas, must not enter in any harmful quantity.
N/A N/A 7 If the object is dipped into water under the defined conditions of pressure and time, water must not enter it in any harmful quantity.
N/A N/A 8 If the object is submerged in water, water must not enter in any harmful quantity.

NEMA / IEC Enclosure Rating Cross Reference

NEMA Rating IEC Rating
1 IP23
2 IP30
3 IP64
3R IP32
4 IP66
4X IP66
6 IP67
12 IP64
13 IP65