nuckolls.bob(at)aeroelect
Guest
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 Posted: Sun Sep 23, 2012 10:00 am Post subject: Why did this AMP crimp on connection get singed and fail? |
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At 04:08 PM 9/22/2012, you wrote:
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Bill,
Search "switches with faston tabs" in the AeroElectric archives.
They discuss the discoloration of the faston insulation as the
result of switch failure. Time frame of sept 08.
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Yes . . . there was a 'rash' of failures manifesting
in 'smoked joints' that started with loose rivets on
the Carling switches. This prompted a lot of discussion
and failure-analysis/tear-downs back about that
time. Something to keep in mind as folks are unhappily
blessed with such events.
Look for a the loci of failure . . . sorta like a
arson investigation. See which parts got hottest.
These usually point to the area off poor connection
where the degradation of the joints began. Several
examples of over-heating in poor conduction areas
are explored here:
http://tinyurl.com/8d63v8x
http://tinyurl.com/8zzkfbb
http://tinyurl.com/8zzkfbb
Whether bolting alternator brackets to crank-cases
or keeping all the connections tight through
a switch, the path to failure is the same. Increase
in resistance increases heating and VOLTAGE DROP
across a joint These two antagonists team up
regeneratively to damage and perhaps fail the
joint.
Bob . . .
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