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11-26-2009, 08:15 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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electrical post - brown insulating washer?
My mag post has this brown plastic/composite washer. Should my terminal go on top of this washer? Why is it there? why would you want to INSULATE the terminal from the base of the post?
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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11-26-2009, 08:25 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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This composite washer is what isolates the "P" lead from ground. Without it, your "P" lead would be grounded, placing the mag in the off position continuously.
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Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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11-26-2009, 08:28 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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So that threaded post is not electrically connected to that big metal hex-shaped surface below it?
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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11-26-2009, 08:30 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Quote:
Originally Posted by prkaye
So that threaded post is not electrically connected to that big metal hex-shaped surface below it?
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That's correct!
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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11-26-2009, 08:33 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Thanks Mel!
As always, the community on this forum really helps make amateur-building the educational endeavour that it should be!
__________________
Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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11-26-2009, 09:36 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Yep that stud that sticks out of the center is actually insulated from the big hex part by a glass insulator.
If you over torque the P-lead nut, you can crack that glass insulator.
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