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nuckolls.bob(at)aeroelect
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 Posted: Thu Feb 16, 2023 9:05 am Post subject: FAT Wire Pt Implementation Question |
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| Quote: |
Is using this smaller #10 stud for my main power feed FAT wire point a poor choice? I ask because most #4 wire connects to 0.31" studs in my experience, though I am a novice at this. Can the smaller #10 stud handle continuous larger currents at 12V like the 0.31" stud can? |
EXCEPT for the instance where the stud is also a carry-thru conductor,
the size of the stud and/or it's material is of very minor importance
in the calculus of power path integrity.
Recall that the holy-grail of connection integrity is GAS TIGHTNESS . . .
i.e. made the mating of power path components as close as practical
to one piece of metal.
Recall our studies of crimped terminal physics and the art of
soldering terminals to fat wires. No voids in the interface
between terminal and wire strands. Similarly, bringing the
terminal flags together . . . or into good contact with the
appliance stud is a function of PRESSURE (force/area) where
the ideal interface actually deforms the surface of the
mating components (this is one reason that copper is universally
preferred for terminal material).
The size of the stud is not particularly important as long
as it meets the goals of holding things together.
| Quote: | | Should I change to device with a 0.31" stud for my hot wire point, to prevent either overheating hazards or unnecessary resistance/loss in the wire path? What do people commonly use for FAT wire points? I don't see many single junction posts available in aviation catalogs, lots on Amazon but questionable quality. |
Short answer: No. Any interconnection technology that
depends on threaded devices for CONDUCTION pathway
integrity is to be carefully evaluated for suitability
to task . . . when in doubt . . . don't. But when your
flat surfaces are inseparably forced into gas-tight
togetherness, thread size is not part of the electrical
equation. Note the thread size on this 200A fuse holder.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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jcohen@post.com
Joined: 10 Mar 2022
Posts: 17
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| Posted: Fri Feb 17, 2023 11:35 am Post subject: Re: FAT Wire Pt Implementation Question |
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thank you for the replies! Very helpful!
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Jeff |
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