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podo3
Joined: 04 Jul 2023
Posts: 2
Location: Chicago NW burbs
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 Posted: Sun Jun 02, 2024 3:08 pm Post subject: Grounding through engine control cables. |
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This excerpt from the Aeroelectric Connection Rev.12, Appendix Z, Note 5 reads:
"Even then, make sure that jackets for engine
controls do not ELECTRICALLY ground both a metal panel
and the engine . . . they can easily become a SECOND
ground path on the wrong side of the airplane and create the
same problems we're striving to eliminate."
Since my control cables touch the engine, firewall, and instrument panel/throttle quadrant, the above statement seems in indicate that I need to insulate them so as not to provide multiple ground paths in addition to the grounding strap I will install from the engine to the firewall mounted grounding post (forest of tabs).
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user9253
Joined: 28 Mar 2008
Posts: 1925
Location: Riley TWP Michigan
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| Posted: Sun Jun 02, 2024 7:23 pm Post subject: Re: Grounding through engine control cables. |
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Notice that note 5 begins with, "When the battery and engine are on opposite
ends of the airplane"
Is that the situation in your airplane? What is the make and model of your aircraft?
Engine cables are not insulated from the firewall or instrument panel in hundreds of RV-12s.
Audio cables should only be grounded at one end, especially microphone
cables or other cables that carry signals which will be amplified.
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_________________
Joe Gores |
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podo3
Joined: 04 Jul 2023
Posts: 2
Location: Chicago NW burbs
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| Posted: Mon Jun 03, 2024 2:59 am Post subject: Re: Grounding through engine control cables. |
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| user9253 wrote: | Notice that note 5 begins with, "When the battery and engine are on opposite
ends of the airplane"
Is that the situation in your airplane? What is the make and model of your aircraft?
Engine cables are not insulated from the firewall or instrument panel in hundreds of RV-12s.
Audio cables should only be grounded at one end, especially microphone
cables or other cables that carry signals which will be amplified. |
Thank you, Joe. I'm building a Bearhawk Patrol. I'm using Z11 rev. P for my electrical. I read the statement as opposite sides not "opposite ends". My battery is on the cabin side of the firewall.
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http://www.matronics.com/Navigator?AeroElectric-List |
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