Hi, I'm roughing out a wiring plan for my -14 empennage and wings. I don't have the exact components figured out yet, so I don't know the pricise quantity and gages of wires, but at this stage I'm just working to validate my understanding of the concepts. I am not certain whether I'll be returning to ground tabs or grounding locally, but for now assume I'll be returning.
My particular concern is electromagnetic interference (EMI), not only with respect to audio signals, but also other potentially sensitive signals. I've been told distance seperation is the primary defense, with shielding as the next layer. With that in mind, here is my rough plan:
Empennage:
• Position light - 2 tefzel (power and return)
• ELT - 1 telephone cable (signal), 1 coax (signal)
• ADS-B - 1 coax (signal)
• Pitch AP - 2 tefzel (power and return), 1 shielded tefzel (trim signal)
• Pitch trim (controlled by AP servo) - 2 tefzel (power and return), 1 shielded tefzel (trim signal)
• COM 1 (may mount this on top well behind canopy) - 1 coax (signal)
Wings:
• Strobe (each side) - 2 tefzel (power and return)
• Nav (each side) - 2 tefzel (power and return)
• VOR/LOC/GS (right wing Archer) - 1 coax (signal)
• Landing/Taxi light (right) - 3 or 4 tefzel (power and return)
• Pitot heat (right) - 2 tefzel (power and return)
• Magnetometer (left) - 2 tefzel (power and return), 1 shielded tefzel (signal)
• Roll AP (right) - 2 tefzel (power and return), 1 shielded tefzel (signal)
• Fuel qty (each side) - ?
Which wires should be physically seperated from which others as much as possible? Which non-coax wires should be shielded as the extra layer of isolation? How would I plan to address EMI issues at the wing root connection points? Thanks.
My particular concern is electromagnetic interference (EMI), not only with respect to audio signals, but also other potentially sensitive signals. I've been told distance seperation is the primary defense, with shielding as the next layer. With that in mind, here is my rough plan:
Empennage:
• Position light - 2 tefzel (power and return)
• ELT - 1 telephone cable (signal), 1 coax (signal)
• ADS-B - 1 coax (signal)
• Pitch AP - 2 tefzel (power and return), 1 shielded tefzel (trim signal)
• Pitch trim (controlled by AP servo) - 2 tefzel (power and return), 1 shielded tefzel (trim signal)
• COM 1 (may mount this on top well behind canopy) - 1 coax (signal)
Wings:
• Strobe (each side) - 2 tefzel (power and return)
• Nav (each side) - 2 tefzel (power and return)
• VOR/LOC/GS (right wing Archer) - 1 coax (signal)
• Landing/Taxi light (right) - 3 or 4 tefzel (power and return)
• Pitot heat (right) - 2 tefzel (power and return)
• Magnetometer (left) - 2 tefzel (power and return), 1 shielded tefzel (signal)
• Roll AP (right) - 2 tefzel (power and return), 1 shielded tefzel (signal)
• Fuel qty (each side) - ?
Which wires should be physically seperated from which others as much as possible? Which non-coax wires should be shielded as the extra layer of isolation? How would I plan to address EMI issues at the wing root connection points? Thanks.