T/CAS 529-2021 Wiring cable short sample conductor DC resistance test method

Scope

Scope: This standard specifies the test equipment, sample preparation, test procedures, test results, and calculations and test records for the DC resistance test of conductors in short samples. This standard applies to conductors of wires and cables with a sample length not exceeding 1 m and not less than 0.45 m, and a nominal cross-section not exceeding 16 mm2, for which the DC resistance measurement is performed using a two-arm bridge with a measurement range of (2×10-5 ~ 99.9) Ω. This standard does not apply to wires and cable samples whose length meets the test requirements of GB/T 3048.4-2007. Main technical content: 1. Scope: This standard specifies the test equipment, sample preparation, test procedures, test results, and calculations and test records for the DC resistance test of conductors in short samples. This standard applies to conductors of wires and cables with a sample length not exceeding 1 m and not less than 0.45 m, and a nominal cross-section not exceeding 16 mm2, for which the DC resistance measurement is performed using a two-arm bridge with a measurement range of (2×10-5 ~ 99.9) Ω. This standard does not apply to wires and cable samples whose length meets the test requirements of GB/T 3048.4-2007. 2. Normative references: The following documents are essential for the application of this document. For all referenced documents with a specified date, only the version specified on that date applies to this document. For all referenced documents without a specified date, the latest version (including all amendment sheets) applies to this document. GB/T 3048.1-2007 Methods for Electrical Performance Testing of Wires and Cables - Part 1: General Provisions GB/T 3048.4-2007 Methods for Electrical Performance Testing of Wires and Cables - Part 4: DC Resistance Test of Conductors 3. Test equipment 3.1 The schematic diagram of the bridge is shown in Figure 1

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