General.

CFR · 2024-01-01 · US · Title 14

(a) (1) Be determined by an electrical load analysis; and (2) Meet the requirements of § 25.1309. (b) (1) Power sources function properly when independent and when connected in combination; (2) No failure or malfunction of any power source can create a hazard or impair the ability of remaining sources to supply essential loads; (3) The system voltage and frequency (as applicable) at the terminals of all essential load equipment can be maintained within the limits for which the equipment is designed, during any probable operating condition; and (4) System transients due to switching, fault clearing, or other causes do not make essential loads inoperative, and do not cause a smoke or fire hazard. (5) There are means accessible, in flight, to appropriate crewmembers for the individual and collective disconnection of the electrical power sources from the system. (6) There are means to indicate to appropriate crewmembers the generating system quantities essential for the safe operation of the system, such as the voltage and current supplied by each generator. (c) (d) (1) A single malfunction, including a wire bundle or junction box fire, cannot result in loss of both the part turned off and the part turned on; and (2) The parts turned on are electrically and mechanically isolated from the parts turned off.

official document · source cfr-2024 · id 14:§ 25.1351