All,
There seems to be a lot of reliance on grounding the "filler cap" plus
other components to create a grounding path. If other "filler caps" are
like mine, it's not possible because its plastic, not aluminum as it
appears to be.
Dale
A#140
<fillinger@ameritech.net> writes:
> <fillinger@ameritech.net>
>
> DuaneFamly@aol.com wrote:
> > So am I to conclude that there should be two separate electrical
> bonds
> > in the plane? One for all the regular things that need electrons
> to
> > operate (lights, engine, instruments, etc.) and a separate one
> that
> > bonds the various nonoperating parts of the fueling systems to a
> > single point that one can attach a ramp ground wire to and the
> > container that the fuel is presently in when refueling.
>
> There is no need for the A/C's electrical system ground be involved,
> but
> a practical consideration is that airport fueling personnel will
> attach
> the bonding wire to the exhaust pipe. One need minimally only bond
> the
> metal filler opening, so I suppose one could placard the filler to
> that
> effect and provide a means of attaching the clip.
>
> If by "bonding the various nonoperating parts of the fueling system"
>
> means other than the filler cap, then I believe that's more
> hazardous.
> What will happen is that any static accumulating in the vicinity of
>
> those metal parts will be sent to the filler cap, unnecessarily
> raising
> its voltage potential. If the filler cap is also earthed in some
> way,
> then there's no hazard. Even one's body can drain off the charge if
> the
> conditions are right. However, it's best to leave any static deep
> inside the system, and this is the reason that filling an ungrounded
>
> metal can is more hazardous than a plastic container, where static
> charges tend to remain where they accumulate.
>
> Regards,
> Fred F.
>
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