This Part 3-10 of EN 50289 details the method of test to determine the ability of a finished cable used
in analogue and digital communication systems to withstand mechanical twisting and torsion.
The primary purpose of the torsion test is to measure any variation in optical power transmittance of
a fibre or electrical performance of a copper cable when the cable is subjected to torsional and
twisting forces external to the cable jacket. A secondary purpose is to evaluate the possibility of
physical damage that may occur as a result of such stresses.
The primary purpose of the twisting test is to determine the change of RL and NEXT caused when
the cable assembly is subjected either to bending or twisting.
It is to be read in conjunction with EN 50289-3-1, which contains essential provisions for its
application.