AS NZS IEC 61034.2:2017 pdf free.Measurement of smoke density of cables burning under defined conditions Part 2: Test procedure and requirements.
5.2.2 Mounting of test sample
The test sample shall remain in situ during the test as follows:
— individual test pieces or bundles of test pieces shall be bound together at the ends, and at 300 mm from each end, at which place they shall be clamped to the support by means of wire binders.
NOTE Depending upon construction, test samples prepared from small cables or flexible cables may be subject to movement during the test. In these cases, it is also recommended that the test pieces or bundles are bound with two turns of approximately 0,5 mm diameter wire in the centre and at every 100 mm each side from the centre. Alternatively, the test pieces or bundles may be tensioned at one or both ends by means of an appropriate device, for example a spring or a weight.
5.3 Positioning of test sample
The tray containing the alcohol shall be supported above the ground surface to permit air circulation around and beneath the tray. The individual test pieces or the bundles of test pieces shall be laid touching in a horizontal position and centred above the tray so that the distance between the underneath of the test sample and the bottom of the tray is 150 mm ± 5 mm (see Figure 2).
6 Test procedure
NOTE Before each test, it may be necessary to clean the windows of the photometric system to regain 100 % light transmission after stabilization of the voltage (see also Clause A.2 of lEG 61034-1).
6.1 Immediately before commencing a test, the temperature within the cube shall be in the range of 25 °C ± 5 °C when measured at the internal door surface at a height of 1,5 m to 2,0 m and a minimum of 0,2 m from the walls.AS NZS IEC 61034.2 pdf download.