This part of IEC 60851 specifies the following tests:
Test 5: Electrical resistance;
Test 13: Breakdown voltage;
Test 14: Continuity of insulation;
Test 19: Dielectric dissipation factor;
Test 23: Pin hole.
For definitions and general notes on methods of test, Clause 3 of IEC 60851‑1:2021 applies.
This part of IEC 60851 also specifies methods for determining the dissipation factor of enamelled winding wire, provided in Annex A.