AS NZS IEC 60332.1.1:2017 pdf free
AS NZS IEC 60332.1.1:2017 pdf free.Tests on electric and optical fibre cables underfire conditions
The average of the three values obtained shall be rounded to obtain the overall diameter. If the calculation gives 5 or more for the second decimal figure, raise the first to the next number;thus, for example, 5,75 is rounded to 5,8. If the calculation gives 4 or less for the second decimal figure, maintain the first number; thus, for example, 5,74 is rounded to 5,7.
The test piece shall be straightened and secured to two horizontal supports by means of a suitable size of copper wire, in a vertical position in the centre of the metal enclosure, as described in IEC 60332-1-1, so that the distance between the bottom of the upper support and the top of the lower support is (550±5) mm. In addition, the test piece shall be positioned so that the bottom of the specimen is approximately 50 mm from the base of the enclosure (see Figure 1).
A burner, as described in IEC 60332-1-1, shall be ignited and the flow rates of gas and air adjusted to the specified values. The burner shall be positioned so that the tip of the blue cone impinges on the surface of the test piece at a distance of (475±5) mm from the lower edge of the upper horizontal support, whilst the burner is at an angle of (45±2°) to the vertical axis of the test piece (see Figure 2). The burner position shall be fixed throughout the flame application time.
For flat-form cables, the flame impingement shall be on the middle of the flat side of the cable.In case of an electrical insulated conductor or cable, should the test piece move significantly during the test so as to render the result invalid, the test piece shall be held straight by the attachment of a load of approximately 5 N/mm2 of conductor area to the lower part of the sample so that the distance between the point where the load is attached and the lower edge of the top support measures (550±5) mm. In such cases, the test piece shall not be secured to the lower support.AS NZS IEC 60332.1.1 pdf free download.
