13.16.160: OVERHEAD WIRES:
All overhead service wires shall be of approved weatherproof or rubber coating; shall be employed on single wires and approved rubber covered wire on multiple conductors or cable. Wires shall not be smaller than no. 10, provided span from pole to building is not over seventy five feet (75'); if distance is greater, size must be increased in proportion to the distance. (Prior code § 8-4-11)