GB/T 3048.5-2007 in English

《GB/T 3048.5-2007电线电缆电性能试验方法　第5部分：绝缘电阻试验》由TC213（全国电线电缆标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准规定了直流比较法和电压-电流法测试绝缘电阻的术语和定义、试验设备、试样制备、试验程序、试验结果及计算、注意事项和试验记录。

1 Scope
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.
This part is applicable to the measurement of the insulation resistance of electric wires and cables, including DC comparison method and voltage-current method: the measurement range of DC comparison method is (105 ~2×1035)Ω; the measurement range of voltage-current method is (104 ~ 1016)Ω; in general, measurement voltage is (100 ~500)V.
For voltage-current method, if the measured voltage and current are directly shown with ohmmeter on the same instrument, it can be called "megger method".
This part shall be used together with GB/T 3048.1.
2 Normative References
The provisions of the following documents which, through reference in this part of GB/T 3048, constitute provisions of this part. For dated reference, subsequent amendments to (excluding correction contents), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.

Contents
Foreword i
1.Scope
2 Normative References
3 Terms and Definitions
4 Test Equipment
5 Sample Preparation
6 Test Procedures
7 Calculation of Test Result
8 Cautions
9 Test Data Sheet