nuckolls.bob(at)aeroelect
Guest
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 Posted: Sun May 16, 2010 6:30 pm Post subject: A 35 amp C/B switch to control a Facet Aux Fuel Pump!!! |
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At 07:10 PM 5/16/2010, you wrote:
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Heh guys. I'm sort of new at this so give me a little slack. I'm
trying to re-wire my aircraft with the proper wiring and changing
out my C/Bs using Klixons. Question: In my removal of the old B&P
C/Bs I came across one that was a 35-amp B&P C/B switch that was
controlling my Facet Aux Fuel Pump. The funny thing is that Facets
website says that it requires a max of 1 amp for the pump. I
thought this was unusual to me. Any comments on why someone would
wire it up with a 35amp C/B switch? Am I wrong in my
thinking? Should I be using a much smaller rated C/B switch? Need
lots of help. Not real savvy on wiring. Thanks guys.
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Yup, if the pump is the only thing powered by this
switch/breaker, then it SHOULD be a device sized
for the wire that connects the pump to the bus. Are
you sure this switch/breaker was being used for
BOTH its capabilities as a switch AND a breaker,
or just a switch. In other words, does the switch/
breaker bolt right to a bus bar along with other
breakers . . . or dose it have WIRES on both
terminals, one of which goes to the REAL breaker
on the bus. You may find that this otherwise
oversized critter was being used just for its
functionality as a switch and the real circuit
protection is right at the bus.
If it IS a dual purpose device, then by all
means, drop to a 5A device. 35 is MUCH
too large. What kind of airplane is this?
Bob . . .
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