Larry DeCamp
Well Known Member
I have been corresponding an RV builder regarding system plan for dual EI. I have some schematics from Dan H suggesting direct battery connections for EI #1 and EI#2, independent of master relay. Recognizing every component eliminated is one less failure point, what is the master relay for ?
If avionics, com, strobes, landing lights etc. are all on a separate switch, why have a master relay to energize a "main" buss? Yes, the alternator field would require a switch, not a breaker, and the battery buss conductor should be a safe "fat wire" per Nuckols.
It appears to me 3 switches would control power and ignition:
IGN #1
IGN #2
Alt field
So, what am I missing ?
If avionics, com, strobes, landing lights etc. are all on a separate switch, why have a master relay to energize a "main" buss? Yes, the alternator field would require a switch, not a breaker, and the battery buss conductor should be a safe "fat wire" per Nuckols.
It appears to me 3 switches would control power and ignition:
IGN #1
IGN #2
Alt field
So, what am I missing ?