HK 3380 (serv.man10) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 17

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IEC 60065, 6th edition : 1998

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- Page 12 of 37 - 

 

 

   

 Order 

No. 

14649

 

 

 

 

8.7 

Basic insulation between parts at 
35 V to 71 V (peak) a.c. or 60 V to 
120 V d.c. and accessible parts   

No parts at 35-71V(peak) a.c. or 60-120V d.c. 
 

 

Reinforced or double insulation 
between circuits operating at 
voltages between 35 V and 71 V 
(peak) a.c. or between 60 V and 
120 V d.c. and hazardous live parts 
at higher voltage   

No parts at 35-71V(peak) a.c. or 60-120V d.c. 
 

 

Separation by Class II isolating 
transformer  

Isolating transformer according to 14.3.2. (Class II) 

 

Separation by Class I transformer   

 

 

Separation by earthed conductive 
part  

 

8.8 

Basic or supplementary insulation 

≥

 0,4 mm (mm)      

 

 

Reinforced insulation 

≥

 0,4 mm 

(mm) 

Insulation in transformer, ref. 14.3. 

 

Thin sheet insulation used inside the 
enclosure

 

 

 

Basic or supplementary insulation, at 
least two layers, each meeting 10.3 

 

 

Basic or supplementary insulation, 
three layers any two of which meet 
10.3  

 

 

Reinforced insulation, two layers 
each of which meet 10.3   

 

 

Reinforced insulation, three layers 
any two which meet 10.3   

 

8.9 

Primary wiring : 
Adequate insulation between internal 
hazardous live conductors and 
accessible parts   

Double insulated. 

 

Secondary wiring : 
Adequate insulation between internal 
hazardous live parts and conductors 
connected to accessible parts   

Single insulated but safely anchored. 
 

8.10 

Class II apparatus : 
Double insulation between 
conductors connected to the mains 
and accessible parts   

Double insulated, tested according to 8.9. and 10.3. 

 

Class II apparatus : 
Double insulation between 
conductors connected to accessible 
parts and the mains