International Protection (IP) Ratings
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| The IP rating system provides a means of classifying
the degrees of protection from solid objects and liquids afforded
by electrical equipment and enclosures. The system is recognized
in most European countries and is set out in a number of British
and European standards.These include: Classification of Degrees
of Protection Provided by Enclosures, BS (British Standards) 5490:1977;
IEC (International Electrotechnical Commission) 529:1976. |
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| Specifications for Degrees of Protection of Enclosures
of Switchgear and Control Gear for voltages up to and including
1000 VAC and 1200 VDC, BS 5420:1977; and IEC 144:1963. |
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First number Protection against solid objects
0 no protection
1 protected against solid objects up to 50 mm (e.g. accidental touch by hands)
5 protected against dust-limited to ingress (no harmful deposits)
6 totally protected against dust |
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Second number Protection against liquids
0 no protection
1 protected against vertically falling drops of water (e.g. condensation)
2 protected against direct sprays of water up to 15° from the vertical
4 protected against water sprayed from all directions—limited ingress
permitted
6 protected against strong jets of water—limited ingress permitted (e.g.
for use on ship decks)
7 protected against the effects of immersion between 15 cm and 1 m
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