Except where electrical wires have been de-energized and visibly grounded, or barriers have been erected to prevent physical and arcing contacts with the high-voltage overhead lines, the following provisions shall be met:

    1. Over Lines. The operation, erection or handling of tools, machinery, apparatus, supplies or materials, or any part thereof, over high-voltage overhead lines located upon a public street, is prohibited.

    2. Restricted Activities. The operation, erection, storage or movement of tools, machinery, equipment, apparatus, materials or any structure, or any part thereof, upon any public street, within the clearances from high-voltage overhead lines set forth in Table X, is prohibited.

Table X

Clearances from High-Voltage Overhead Lines

            Nominal Voltage                              Lateral or Vertical

            (Phase to Phase)                                Clearance (Feet)

            750 -  50,000            10

            over  50,000 -  75,000        11

            over  75,000 - 125,000        13

            over 125,000 - 175,000        15

            over 175,000 - 250,000        17

            over 250,000 - 370,000        21

    3. Presumption. Any overhead line shall be considered to be energized unless and until the person owning or operating such line verifies that the line is not energized, and the line is visibly grounded at the work site.  (Ord. S-29555, 1976).