Common test methods for insulating and sheathing materials of electric and optical cables. Part 4-2. Methods specific to polyethylene and polypropylene compounds. Tensile strength and elongation at break after conditioning at elevated temperature. Wrapping test after conditioning at elevated temperature. Wrapping test after thermal ageing in air. Measurement of mass increase. Long-term stability t
State system for ensuring the uniformity of measurements. State verification schedule for noise spectral density means of measuring within the frequency range from 0,002 to 178,3 GHz
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