Abstract: A tensioning system comprises one or more cable spacing members (60, 70) with a plurality of cable spacing portions for spacing apart a plurality of runs of cable (10) and a support (40, 50) for supporting the cable spacing member(s) (60, 70). One or more adjustable positioning members (45) for positioning the cable spacing member(s) (60, 70) relative to the support (40, 50) are provided. Adjustment of the one or more adjustable positioning members (45) positions the cable spacing member(s) (60, 70) relative to the support (40, 50) and adjusts the tension in the runs of cable (10). The cable spacing member(s) (60, 70) are preferably provided within the support (40, 50) with the runs of cable (10) extending through a longitudinal slot in the support (40, 50).