Electrical installations. Electrical installations in connection with earth satellite receiving stations, 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 satellite earth station to the receivers shall be installed underground unless installation site conditions preclude underground. If a satellite earth station is to be used by two 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 permit. All satellite earth stations shall be grounded against direct lightning strikes.