REFLECTOR: Position Light Wires

[John Dibble]

For an EI, is it just the wires from the controller to the coil, or do 
all wires need to be twisted?

For the alternator, does twisting include the large output wire, or just 
the small ones?

Thanks,

John

On 6/27/2013 2:11 PM, Brian Michalk wrote:
> Only shield wires that:
> 1)    radiate a lot of noise (capacitively  -- i.e., have a large dv/dt)
> 2)    are sensitive to noise
>
> Position lights are very quiet, and you don't care if they collect 
> noise from other sources.
>
> Strobes are noisy, so twisting and shielding the power/ground leads 
> works there.  If your strobe power pack charge pump is RF noisy (bad 
> capacitors) then, yes, shielding is needed, but IMO, that's treating 
> the symptom.
>
> On my airplane, it's very quiet electrically.  The big offenders: 
> electronic injectors, coil packs, alternator are all twisted 
> power/ground pairs.
>
> I do not shield ANY of my avionics (not even microphones).  They are 
> quite happy with the arrangement.  Proper grounding is the key to a 
> noise free airplane.
>

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