GB/T 19216.3-2021 Circuit integrity test for electric cables or optical fiber cables under fire conditions—Part 3:Test method for fire with shock at a temperature of at least 830℃ for cables of rated voltage up to and including 0.6/1 kV tested in a metal enclosure

Scope

This document describes the test method for ensuring the integrity of fire-resistant cables when they are subjected to flames and impact vibrations under specified conditions when installed in metal conduits. This document applies to cables with a rated voltage of 0.6/1 kV and below, including metal conductor data for cables with a rated voltage below 80 V, as well as telecommunications cables and optical cables. This document applies to test cables with an outer diameter of less than or equal to 20 mm. This document describes the test failure points, continuity inspection devices, test samples, test procedures, and test reports for power and control cables with a rated voltage of 0.6/1 kV and below. The test failure points, continuity inspection devices, test samples, test procedures, and test reports for metal conductor data and telecommunications cables are not provided. Although the scope of application is limited to cables with a rated voltage of 0.6/1 kV and below, they can also be applied to cables with a rated voltage of 1.8/3(3.3) kV and below, provided that the manufacturer and the buyer agree and appropriate fuses are installed. It is not assumed that cables successfully evaluated using this method will also meet the requirements of GB/T 19216.1-2021 or GB/T 19216.2-2021. The tests for each of these two standards must be conducted separately. According to the provisions of Chapter 11 of GB/T 19216.1-2021 or Chapter 11 of GB/T 19216.2-2021, this additional performance can be identified by marking. Appendix A provides a verification method for the burner and control system used in the test. Warning: The test described in this document may involve the use of dangerous voltages and temperatures. Appropriate precautions should be taken to prevent the potential risks of electric shock, combustion, fire, and explosion, as well as any harmful gases that may be generated.

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