AS NZS IEC 60331.2:2021

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AS NZS IEC 60331.2:2021 pdf free.Tests for electric cables under fire conditions 一Circuit integrity.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at
• ISO Online browsing platform: available at
circuit integrity
ability of an electric cable to continue to operate in the designated manner whilst subjected to
a specified flame source for a specified period of time under specified conditions
draught-free environment
space in which the results of tests are not significantly affected by the local air speed
4 Test environment
The test shall be carried out in a draught-free environment within a suitable chamber, of minimum volume 20 m3, with facilities for disposing of any noxious gases resulting from the burning. Sufficient ventilation shall be available to sustain the flame for the duration of the test. Air inlets and the exhaust chimney should be located in such a way that the burner flame remains stable during the verification procedure and test. If necessary, the burner shall be shielded from any draughts by the use of draught shields. Windows may be installed in the walls of the chamber in order to observe the behaviour of the cable during the test. Fume exhaust should be achieved by means of natural draught through a chimney located at least 1 m from the burner. A damper may be used for adjustment of ventilation conditions.
NOTE Experience has shown a chamber similar to the 3 m cube specified in IEC 61034-1 to be suitable.
The chamber and test apparatus shall be at a temperature of between 10 °C and 40 °C at the start of each test.
The same ventilation and shielding conditions shall be used in the chamber during both the verification and cable test procedures.AS NZS IEC 60331.2 pdf download.

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