International Elelctrotechnical Commission <br/><br/>
IEC: 60077-2-1999: Railway applications- Electric equipment for rolling stock- Part 2: Electrotechnical components- General rules 

 - 1 
 - Geneva  International Elelctrotechnical Commission  1999 
 - 63 
<br/><br/> Downloaded from the IEC website 
<br/><br/><label>Universal Decimal Class. No.: </label> /