Alternator Fuse

• You need an ANL fuse holder for each alternator, e.g. from Steinair
  • You will need 2 x MS24694-S56 AN3 flat head bolts to mount the fuse holder,e.g. pack of 25 from Spruce. It commonly says the holes of the fuse holder are for M6 bolts but the countersunk of the holder is 100 degrees, while M6 bolts have 90 degree flat heads.
  • The fuse protects your airplane bus from a malfunctioning alternator with shortened diodes, also, the wire is unfused hot from the battery side when the master relay is on.
• You need a fuse mostly equal to the rating of the alternator, but do check the alternator manal, i.e.
  • a 60A fuse for the very commonly used B&C LX60 alternator (instead of the PlanePower one coming with Vans FF kit), e.g. from Steinair
  • a 40A fuse for the very commonly used B&C BC410-H standby alternator, e.g. from Steinair