IEC 61138-2007 pdf Cables for portable earthing and short-circuiting equipment

4.3.2 Colour of insulation There is no preferred colour for the insulation. The colour of the insulation shall be achieved by the use of coloured compounds or other suitable method. The insulation, whether coloured or not, may be transparent. 4.3.3 Application to the conductor The insulation shall be closely applied to the conductor or separator. It shall be possible to remove the insulation without damage to the insulation itself, to the conductor, or to the tin coating if any. Compliance shall be checked by inspection and by manual test. 4.3.4 Thickness The mean value of the thickness of the insulation shall be not less than the specified value in Table 3 and Table 4. However, the thickness at any place may be less than the specified value, provided that the difference does not exceed 0,1 mm + 1 5 % of the specified value. Compliance shall be checked by the test given in 1 .9 of IEC 60227-2 or IEC 60245-2. 4.3.5 Mechanical properties before and after ageing The insulation shall have adequate mechanical strength and elasticity within the temperature limits to which it may be exposed in normal use. Compliance shall be checked by carrying out the tests specified for each type of insulation in: IEC 60502-1 , Table 1 5 for EPR or similar; in addition, cables covered by this type of compound shall be subjected to a cold bending or elongation test at –50 °C; IEC 60227-1 , Table 2 (PVC/ST 5) as a general purpose compound; Table 7 of this standard for PVC/ST 1 1 as a cold-resistant compound; Table 9 of this standard for cross-linked silicone rubber compound. The applicable test methods and the results to be obtained for each type of insulation are also specified in the above-mentioned tables.
4.4 4.4.1 Marking Indication of origin Cables shall be provided with an indication of origin consisting of either the manufacturer’s identification thread; or the continuous marking of the manufacturer’s name or trade mark, by printing, or by indenting or embossing on the insulation. 4.4.2 Indication of code designation and cross-sectional area of the conductor Cables shall be provided with an indication of the code designation according to 6.2 and the cross-sectional area of the conductor “….. mm 2 “. (See Table 3 and Table 4). This shall be made by printing or by indenting or embossing on the insulation.