ON CALL (serv.man2) - JBL Audio EMC - CB Certificate (repair manual). Page 14

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ST-06153 
 
IEC 60950-1 / EN 60950-1 
Clause 
Requirement – Test  
Result – Remark  
Verdict 
 
 
TRF No.: IECEN60950_1A 
 
 
2.9 Electrical 
insulation 
 
2.9.1 
Properties of insulating materials 
Natural rubber, hygroscopic 
materials or asbestos are not 
used 
2.9.2 
Humidity conditioning 
See remark below 
 Humidity 
(%) .......................................................: 93 
 
 
Temperature (
°C) ...............................................: 40 
 
2.9.3 
Grade of insulation 
Considered 
Remark:  
40 
°C, 93 %, 120 hours (The apparatus intended to be used in tropical conditions). 
 
2.10 
Clearances, creepage distances and distances through insulation 
 
2.10.1 General 
 
 
2.10.2 
Determination of working voltage 
See the note on pages 15 and 
16 
2.10.3 Clearances 
 
2.10.3.1 General 
 
2.10.3.2 
Clearances in primary circuit 
(see appended tables 2.10.3 
and 2.10.4)   
2.10.3.3 
Clearances in secondary circuits 
 
N/A 
2.10.3.4 
Measurement of transient voltage levels 
 
N/A 
2.10.4 
Creepage distances 
(see appended tables 2.10.3 
and 2.10.4)  
 CTI 
tests.............................................................. : Considered as Material Group 
IIIb  
 
2.10.5 Solid 
insulation 
 
2.10.5.1 
Minimum distance through insulation 
Approved optocoupler (U2) 
(see also appended table 1.5.1) 
2.10.5.2 
Thin sheet material 
 
 
Number of layers (pcs)........................................ : (see appended table 2.10.5) 
 
 
Electric strength test 
(see appended table 2.10.5) 
 
2.10.5.3 Printed 
boards 
 
N/A 
 
Distance through insulation 
 
N/A 
 
Electric strength test for thin sheet insulating 
material  
 
 
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