International Electrotechnical Commission <br/><br/>
IEC: 60034-5-2000: Rotating electrical machines- Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code)- Classification 

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 - Geneva  International Electrotechncial Commission  2002 
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<br/><br/> Downloaded from the IEC website 
<br/><br/><label>Universal Decimal Class. No.: </label> /