Considerations for Ground Fault Interrupter (GFI) / Arc Fault Circuit Breaker (AFCB) for fuel pumps power circuit protection installation, specification and testing


This SAE Aerospace Information Report (AIR) is intended to provide guidance for installing GFI/AFCB in the fuel pumps power circuits for protection of fuel vapors ignition inside the tank in case of a failure that causing arcing inside the pump. Besides, this AIR is also intended to provide minimum specification and testing for ground fault interrupter (GFI) and arc fault circuit breaker (AFCB), addressing the issues associated with the verification requirements based on current regulatory guidance per AC25.981-1C.


Need for guidance document to determine if GFI or AFCB is required for safety compliance of fuel pump power circuit installation in the fuel system, as well as, to provide guidelines for minimum specification and testing if there is a GFI or AFCB is installed in the pump power circuit, since AS5692 and AS6019 provide specification for AFCB for AC and DC applications, respectively; but do not specifically address the concerns of 25.981 and other system safety installation requirements such as 25.954, 25.1309, 25.901(c), 25.1316 and 25.1317.

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