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See Chinese contents: GB/T 3048.5-2007 GB/T 3048.5-2007: Test methods for electrical properties of electric cables and wires -- Part 5: Test of insulation resistance
This Part of GB/T 3048 specifies the terms and definitions, test equipment, sample preparation, test procedures, test results and calculation, cautions, and test record of DC comparison method and voltage-current method for the measurement of insulation resistance.
