Ex Protection

IP-Rating

IP Degree of Protection according to EN/IEC 60529

First figure Second figure
0 No protection 0 No protection
1 Protected against a solid object 50 mm or greater 1 Protected against vertically dripping water
2 Protected against a solid object 12 mm or greater 2 Protected against vertically dripping water, when tilted 15 degrees
3 Protected against a solid object 2,5 mm or greater 3 Protected against water spraying at an angle up to 60 degrees
4 Protected against a solid object 1 mm or greater 4 Protected against water splashing from any direction
5 Dust protected 5 Protected against jets of water from any direction
6 Dust tight 6 Protected against powerful jets of water from any directions
7 Protected against immersion between a depth of 150 mm and 1000 mm
8 Protected against submersion

Approximately correlations between IP (IEC) and NEMA 250 standards

IP 10 NEMA 1
IP 11 NEMA 2
IP 54 NEMA 3 R
IP 52 NEMA 5-12-12 K
IP 54 NEMA 3-3 S
IP 56 NEMA 4-4 X
IP 67 NEMA 6-6 P

Explosive Atmosphere

Atex Directive

Ignition Sources

Basic Electrical Techniques

Equipment Protection Level

IP-Rating