A roller needs to be attached at each pole location after the puller is repositioned from one side of the pole to the other to prevent the cable from coming in contact with the pole. Sometimes if requirements aren t closely followed, general handling could damage the cable. Some people don t realize what those requirements are. According to coax manufacturer Trilogy, proper sag and tension during cable installation help maximize cable plant life. Temperature also affects the sag.
Sag increases slightly on hot days and decreases slightly on cold days.
For rebuilding or upgrades, the overlashing method is common. This method requires hanging cable on a strand with existing cable already lashed to it. To eliminate the binding effect that could result from the existing lashing wire, use a roller that doesn t lock to the strand. Trilogy suggests the best rollers for overlashing are the type that lock around the cable and strand without locking to the strand itself. When pulling for the overlash, there is no room for a cable puller to ride on the strand, so attach a long rope to the cable with a pulling grip and pull the rope through the rollers.