Evaluation of cable movement due to cyclic loading

POWER CABLES undergoing daily load cycles are alternately heated and cooled, building up internal stresses which manifest themselves by the longitudinal movement of the cable into and out of adjacent manholes. This movement subjects the cable sheath to cold working ultimately causing it to fail. It is therefore desirable to determine what factors affect the cable movement, how the amount of movement may be calculated, how this movement may be decreased, and to what extent decreased movement is desirable.