Public Utilities Code § 6294

The grantee of a franchise under this chapter shall construct, install, and maintain all pipes, conduits, poles, wires, and appurtenances in accordance and in conformity with all of the ordinances and rules adopted by the legislative body of the municipality in the exercise of its police powers and not in conflict with the paramount authority of the State, and, as to state highways, subject to the laws relating to the location and maintenance of such facilities therein.