ASTM F3316/F3316M-18 pdf free.Standard Specification for Electrical Systems for Aircraft with Electric or Hybrid-Electric Propulsion.
A means must exist to indicate to appropriate flight crewmembers the elctric power system quantities essential for safe operation.
If provisions are made for connecting external power to the aeroplane, a means must be provided to ensure that no external power supply having an over voltage, an under voltage, a reverse polarity, or a reverse phase sequence, can supply power to the aeroplane electrical system.
If provisions are made for connecting external power to the aeroplane, the external power connection must be located so that its use will minimize the hazard to the aeroplane and ground personnel.
If provisions are made for connecting external power to the aeroplane to charge the aeroplane battery, a means must pe provided to automatically disconnect the external power in the event of a malfunction of the aeroplane battery or battery management system.
If equipped with a combustion engine that is part of the Hybrid-Electric Propulsion System, eletrical equipment must be so designed and installed thatin the event of a fire in the combustion engine compartment, during which the surface of the firewall adjacent to the fire is heated to 10959C [2000°F] forfive minutes or to a lesser temperature substantiated by the applicant, the equipment essential to continued safe operation and located behind the firewall will function satisfactorily and will not create an additional fire hazard.
Circuit protective devices must be installed in all electrical circuits other than circuits in which no hazard is presented by their omission.
A protective device for a circuit essential to fight safety may not be used to protect any other circuit.
Each resettable circuit protective device (“trip free”device in which the tripping mechanism cannot be overridden by the operating control) must be designed so that a manual operation is required to restore service after tripping.
Each resettable circuit protective device (“trip free”device in which the tripping mechanism cannot be overridden by the operating control) must be designed so that if an overload or circuit fault exists, the device will open the circuit regardless of the position of the operating control.
If the ability to reset a circuit protective device is required for continued safe flight and landing, a means must be provided so that it can be readily reset in flight.ASTM F3316 pdf download.