Standard:IEC60245-1 Rubber insulated cables-Rated voltages up to and including 450/750 V-Part 1:General requirements,IEC60245-2 clause 3.2 and Figure 2 Rubber insulated cables-Rated voltages up to and including 450/750 V-Part 2: Test methods.
Application:It is used for checking mechanical strength of completed flexible cables. This test does not apply to flexible cables with cores of nominal cross-sectional area greater than 4mm2 and cables having more than 18 cores laid up in more than two concentric layers.
Test sample:Completed flexible cables.
Feature:A sample with a length of 3m±0.05m shall be tested in an apparatus similar to that shown in figure 2. Two clamps, A and B, shall be located at a height of at least 1.5m above ground level. Clamp A shall be fixed and clamp B shall move horizontally at the level of clamp A. The ends of the sample shall clamped vertically (and remain vertical during the test), one end in clamp A, the other in the movable clamp B which shall be at a distance /=0.20m from clamp A. The cable takes roughly the shape indicated figure 2 by the dotted lines. The movable clamp B shall then be moved away from the fixed clamp A until the loop formed by the cable takes the shape, indicated in figure 2 by the heavy outline, of the U enclosed wholly between two plumb lines through the clamps and set up tangentially to the external generatrix of the cable. This test shall be done twice, the cable being turned in the clamp, after first test, through 180°.
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