>> Bob's drawings show a 15 amp fuse where the 14AWG wire comes off the
upstream
>> (battery side) master contactor. This fuse protects against a short between
>> the always hot wire and the essential switch. What type fuse have people
been
>> using for this application?
The essential bus alternate feed path needs to be sized to
the loads on the bus. IF you're able to achieve the ultimate
in system reliability and get e-bus running loads below
8 amps, then the recommended alternate feed architecture
is shown in the latest encarnation of Appendix Z now downloadable
from our website at http://www.aeroelectric.com/errata/z8_0299.pdf
A 20AWG fuse link crimped into a 14AWG wire (for lower voltage
drop when battery is rear mounted ) or 16AWG wire (if battery
is up front) completes the interconnection along the alternate
feed path.
If you succumb to baser instincts and get an e-bus that's
loaded heavier than 8 amps continuous, then go to a 10 or
15 amp fuse to protect a 14AWG alternate feedpath wire.
I have some builders running a 3-amp continuous/7-amp
intermittant e-bus using 22AWG fuselink and 18AWG
feedline.
If you DO need an inline fuseholder, the Bussmann HFB
device is recommended . . . but I'd work really hard
to avoid the need . . . anything over 5 amps for an
e-bus load really cramps your ability to get where
you want to go with a finite energy resource that
may be of unknown quantity . . .
Bob . . .
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