Section 125.36 - Construction of Risers from Underground(1)Separation Between Risers of Communication and Supply Systems. The placing of risers for communication systems and risers for transmission systems on the same pole should be avoided where practicable. Where located on streets or highways, risers should, where practicable, be placed on poles so as to be in the safest available location from the point of view of traffic damage.(2)Mechanical Protection of Conductors. In unguarded areas all transmission cables from underground systems which connect to overhead systems shall be protected by a covering which gives suitable mechanical protection up to a point 8 feet above the ground. Exception: Armored cables or cables installed in a grounded metal conduit.
(3)Grounding of Riser Pipes. Electrolysis conditions permitting, exposed metal riser pipes on poles containing transmission conductors shall be grounded unless such conductors are covered with a grounded metal sheath or are themselves grounded.(4)Conductor Terminal Construction. The terminals of underground transmission cables connecting to overhead open wire systems shall meet the following requirements: (a)Protection Against Moisture. Protection shall be provided so that moisture will not enter the cable.(b)Insulation of Conductors. Conductors shall be properly insulated from the grounded metal sheath. In addition, the conductors of multiple-conductor cable shall be properly separated and insulated from each other. These requirements may be fulfilled by the use of potheads or other equivalent devices, such as oil switches, if they accomplish the same purpose.