General Order 95
Supply and Communication Lines in Line Crossings or Conflicts
103.4 Communication Wires
No paired wire line conductors or single conductor smaller than that specified in Table 8 for the grade of construction involved shall be used without supporting messengers, except where the circuits crossed over are of less than 750 volts. For communication service drops crossing over supply conductors see Rules 32.2–F and 32.2–G .