PREFORMED LINE PRODUCTS UTF-1211

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Preformed Line Products UTF-1211 F-NECK DISTRIBUTION TIE .756-.858 NEW LINE ANGLES-GENERAL GUIDELINES: -On verticallymounted insulators, Distribution Ties can normally accommodate line angles up to 10°. Larger angles may be accommodated when the insulator is mounted at varying degrees of cant from the vertical, depending upon the actual cant of the insulator. Combining Side Ties with Distribution Ties on a single structure can also affect the acceptable line angles for that structure. -A technical report (TM-197E) is available which describes these various permissible line angles of Distribution Ties as a function of the insulator cant. -In all cases the conductor should rest in the preferred insulator groove, independently of the tie, so the tie is not required to force the conductor to remain in that groove. The largest practical angle a tie can accommodate depends upon limiting factors such as conductor size, tension, span lengths, sag angles, insulator style and orientation, etc. Consult Preformed Line Products for further guidance on line angle issues not covered in the above test report. MECHANICAL STRENGTH: -The Distribution Tie is designed to provide longitudinal holding strength in excess of values required by the National Electric Safety Code. The holding strengths are usually sufficient to contain broken conductors to a single span and minimize damage to the conductor and other structure components. -The Distribution Tie is designed to permit controlled and limited movement of unbroken conductor and, under certain conditions, return the conductor to its original position. The ability of the Tie to give and return under differential loading conditions is called "resiliency" and is designed into each Distribution Tie. TM-166E covers the mechanical testing of the Distribution Tie and is available upon request. VIBRATION DAMPERS: -By using Distribution Ties, abrasion can not reduce the fatigue life of the conductor. However, for lines where experience indicates that prolonged periods of vibration might lead to fatigue of the conductor, cause inner wire fretting, or score the insulators glaze, SVDs are recommended. -The following are guideline definitions for vibration activity. Application of these guidelines should be based on a utility's field experience. "Excessive" Vibration: -Areas where abrasion damage has been known to require replacement of both hand tie wire and protective rods, or where fatigue has been found under clamps. Protective rods should be replaced when visual inspection shows approximately one-half or more of the rod diameter has been abraded. "Severe" Vibration: -Areas where abrasion has required replacement of hand tie wire, but damage to protective rods has not progressed to the point where replacement is necessary. "Moderate" Vibration: -Areas where replacement of hand tie wire has not been required, and damage is minor. Distribution Ties, with tubes, provide protection on areas of "moderate" vibration. TAPPING: -Compared to the use of protective rods, placing hot-line clamps directly over the applied legs of Distribution Ties cannot be recommended. Tapping over protective rods will remain permissible, however, there are now stirrups available that provide a superior method of making hot-line taps. APPLICATION-INSPECTION: -The Distribution Tie can be installed parallel to the pole when pole or conductor clearance is critical. Application Procedures are available.

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PLP UTF-1211 F-NECK DISTRIBUTION TIE .756-.858 *ORDER MINIMUM* 50