International Electrotechnical Commission <br/><br/>
IEC/TR: 60755 - 2008; General requirements for residual current operated protective devices 

 - 2 
 - Geneva  IEC  2008 
 - 79 
<br/><br/> Taken printout from CD-Rom 
<br/><br/><label>Universal Decimal Class. No.: </label> /