Protection of persons against contact with live or moving parts inside the enclosure and protection of equipment against ingress of solid goreign bodies ( protection against contact with moving parts inside the enclosure is limited to conteact with moving parts inside te enclosure which might cause danger to persons )

The first characteristic nummeral and degree of protection

0---- No protection of persons against contact ingress of solid foreign bodies . No protection of person against contact with live or moving parts inside the enclosure .
1----Protection against accidental or inadvertent contact with live or moving parts inside the enclosure by a large surface of the human body , for example , a hand , but not protection against deliberate access to such parts . protection against ingress of large solid foreign bodies .

2---- Protection against contect with live or moving parts inside the enclosure by fingers .
         Protection against ingress of medium-size solid foreign bodies .
3--- Protection againt contact with live or moving parts inside the enclosure by tools , cables or such objects of thickness greater than 2.5mm
Protection against ingress of small solid foreign bodies .

4--- Protection against contact with live or moving parts inside the enclosure by tools , cables or such objects of thickness greater than 1mm .protection against ingress of small solid foreign bodies .

5-- Complete protection against contact with lve or moving parts inside the enclosure . Protection against harmful depostis of dust . The ingress of dust is not totally prevented , but dust cannot enter in an amount sufficient to interfere with satisfactory operation of the equipment enclosed .

6--- Complete protection against contact with live or moving parts inside the enclosure . Protection against ingress of dust .