I think that the 1meg ohm resistor is really only necessary when you are
working with high voltages with appreciable current. It is used to prevent you
---From giving yourself a nasty shock from mains supplies whilst working on,
say
computer equipment etc. There is only 12v on the plane (unless you play with
the HT system whilst the engine is running, but that would be silly:-)
Ed
Turned the engine over last week on its starter. (Trust me, it is a big step
for us)!!!!!
Quoting Fred Fillinger <fillinger@ameritech.net>:
> clevelee@cswebmail.com wrote:
> >
> > ...I've installed a 16 ga ground wire from the filler
> > aluminum cap neck (had to cut out the filler neck to allow room for the
> terminal
> > secured to a flat made in the threads of the aluminum part) and have
> installed
> > the 1 watt 1 meg ohm resister that is recommended en-rout to the engine
> ground.
>
> To save shopping time, a 1/2-watt resistor is much more common and
> sufficient. The average static spark event we experience is just
> barely enough to ignite fuel vapor, and equates to a couple watts for
> a few milliseconds. Converted to heat, a 1/8-watt resistor would
> barely notice it, nor is #16 wire similarly called for - dealing in
> microamps here, else the static shocks that we feel would be lethal!
>
> Although it may be harmless, does anyone have an authoritative source
> stating this resistor is beneficial? The only such sources I can find
> say that the resistance of electrical bonding (here from the filler
> cap thru like the exhaust pipe) to the fuel source should be 20K or
> less. Why do we want to increase this to 1 meg??
>
> Regards,
> Fred F.
>
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