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Comparative Tracking Index (CTI) IEC 60112
This method is used to assess the relative resistance of insulating materials to tracking.
||≥20 mm x ≥20 mm x ≥3 mm
||Between 100 V and 600 V (50 Hz) in 25 V steps
|IEC Test solution
||Current on breaking ≥0,5 A >2,0 s or material burns
Results of the test method:
|Insulating material group
||600 ≤ CTI
||400 ≤ CTI < 600
||175 ≤ CTI < 400 (FR4)
||100 ≤ CTI < 175
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