IEC 61156-5:2020 pdf download – Multicore and symmetrical pair/quad cables for digital communications – Part 5: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz – Horizontal floor wiring – Sectional specification.
6.4 Mechanical and dimensional characteristics and requirements 6.4.1 Dimensional requirements The overall diameter of insulation, the nominal thickness of the sheath and the maximum overall diameter of the sheath are not specified, but shall be indicated in the relevant detail specification. 6.4.2 Elongation at break of the conductors The minimum elongation of the conductor shall be not less than 8 %. 6.4.3 Tensile strength of the insulation The tensile strength of the insulation is not specified, but may be indicated in the relevant detail specification. 6.4.4 Elongation at break of the insulation The minimum value of the elongation at break of the insulation shall be not less than 1 00 %. 6.4.5 Adhesion of the insulation to the conductor The adhesion of the insulation to the conductor is not specified, but may be indicated in the relevant detail specification. 6.4.6 Elongation at break of the sheath The minimum value of the elongation at break of the sheath shall be not less than 1 00 %. 6.4.7 Tensile strength of the sheath The minimum tensile strength of the sheath shall be not less than 9 MPa. 6.4.8 Crush test of the cable The minimum force shall be 1 000 N. 6.4.9 Impact test of the cable The impact resistance of the cable is not specified but may be indicated in the relevant detail specification . 6.4.1 0 Bending under tension The bending performance of the cable is not specified but shall be indicated in the relevant detail specification . 6.4.1 1 Repeated bending of the cable Not applicable. 6.4.1 2 Tensile performance of the cable The tensile strength of the cable is not specified but may be indicated in the relevant detail specification. 6.4.1 3 Shock-test requirements of the cable Not applicable.
6.4.1 4 Bump-test requirements of the cable Not applicable. 6.4.1 5 Vibration-test requirements of the cable Not applicable. 6.5 Environmental characteristics 6.5.1 Shrinkage of insulation When tested at (1 00 ± 2) °C for 1 h, the shrinkage of the insulation shall not exceed 5 %. The length of the sample shall be 1 50 mm, and the shrink-back shall be measured as the sum from both ends. 6.5.2 Wrapping test of insulation after thermal ageing Not applicable. 6.5.3 Bending test of insulation at low temperature The bending test of the insulated conductor shall be carried out at (–20 ± 2) °C. The mandrel diameter shall be 6 mm. There shall be no cracks in the insulation. 6.5.4 Elongation at break of the sheath after ageing The ageing regime shall be seven days at (1 00 ± 2) °C. The tensile strength elongation at break after ageing shall not be less than 50 % of the unaged value and shall in no case be less than 1 00 %. 6.5.5 Tensile strength of the sheath after ageing The ageing regime shall be seven days at (1 00 ± 2) °C. The elongation tensile strength after ageing shall be not less than 70 % of the unaged value. 6.5.6 Sheath pressure test at high temperature Not applicable. 6.5.7 Cold bend test of the cable The bending test shall be carried out at (–20 ± 2) °C. The mandrel diameter shall be eight times the overall diameter of the cable. There shall be no cracks in the sheath. 6.5.8 Heat shock test Not applicable. 6.5.9 Damp heat steady state Not applicable. 6.5.1 0 Solar radiation (UV test) The resistance to solar radiation is not specified but may be specified in the relevant detail specification.
6.5.1 1 Solvents and contaminating fluids The resistance to solvents and contaminating fluids is not specified but may be specified in the relevant detail specification. 6.5.1 2 Salt mist and sulphur dioxide Not applicable. 6.5.1 3 Water immersion Not applicable. 6.5.1 4 Hygroscopicity The amount of moisture gained after 3 h shall not exceed 1 % in weight. 6.5.1 5 Wicking The test solution shall not wet the filter paper at the end of 6 h. 6.5.1 6 Flame propagation characteristics of a single cable If required by local regulations and indicated in the relevant detail specification, the test shall be performed in accordance with IEC 61 1 56-1 . 6.5.1 7 Flame propagation characteristics of bunched cables If required by local regulations and indicated in the relevant detail specification, the test shall be performed in accordance with IEC 61 1 56-1 .