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Markus Kuhn (talk | contribs) moved bogus third-digit section to discussion page (until someone provides a reference for where this comes from) |
Josh Parris (talk | contribs) clumsily merged from IP rating |
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For example, an electrical socket rated IP22 is protected against insertion of fingers and will not be damaged or become unsafe when exposed to vertically or nearly vertically dripping water. IP22 or IP2X are typical minimum requirements for the design of electrical accessories for in-door use.
A third, optional, digit represents protection against mechanical impact damage. 0 = no protection, while 9 = protection against 20 [[joule]] impact (5 [[Kg]] at 40 [[cm]]).
==First digit==
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North American ingress-protection rating systems are defined in [[NEMA]] 250, [[Underwriters Laboratories|UL]] 50, UL 508, and [[Canadian Standards Association|CSA]] C22.2 No. 94.
==External link==
*[http://www.accesscomms.com.au/IP.htm IP ratings]
[[Category:Electrical engineering]]
[[Category:IEC standards]]
[[de:Schutzart]]
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