Electrical installations. To safeguard public safety, electrical installations in connection with signal receiving antennas, including grounding of the system, shall be in accordance with the National Electrical Safety Code, Wisconsin State Electrical Code and the instructions of the manufacturer. In cases of conflict, the stricter requirements shall govern. All cable used to conduct current or signals from the signal receiving antenna to the receivers shall be installed underground unless installation site conditions preclude underground. If a signal receiving antenna is to be used by two (2) or more residential property owners, all interconnecting electrical connections, cables and conduits must also be buried. The location of all such underground lines, cables and conduits shall be shown on the application for a permit. All signal receiving antennas shall be grounded against direct lightning strikes.