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windshield brace wiring

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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Thu Apr 08, 2010 7:30 pm Post subject: windshield brace wiring

I am just getting ready to final install my canopy top and had a question to run by the brain trust on running wiring through the canopy brace.



I have the aerosport overhead console for my A/C installation and I installed wire channel down the length of it which makes it really convenient for getting wires to the back, especially for the a/C unit on an upper tray behind the bulkhead.



What I would ideally like to run through the brace are seven 16 gauge wires (two for my overhead light, and the five for the a/c control), an RG coax for the Garmin GPS antenna and wires associated with the Dynon Skyview  GPS run. (haven't seen it but heard that there are four or five "thin" wires associated with that.



I have notched out the top of my upper forward panel and underlying rib where the brace meets.  I think I'll have room, but it will be tight.



I would appreciate any comments pro or con to this idea, or any tales of similar runs by someone else.  Is there any reason not to do this that I haven't thought of?



Thanks in advance.

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Myron Nelson
Mesa, AZ
Flew May 10 2014

AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Thu Apr 08, 2010 7:46 pm Post subject: windshield brace wiring

I have a VOR-coax wire and a low power (20 guage) wire for a vertical card compass running there. Not real critical items and the compass light is almost never used (I do not fly at night).



 I personally do not like the idea of running the high amperage (16 guage)  lines up there. I would worry about chafe at the entry/exit points of the steel tube. If the overhead console is not removable there is no way to inspect for chafe and shorts.

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Jim Berry

Joined: 10 Jan 2006
Posts: 237
Location: Denver

Posted: Thu Apr 08, 2010 8:03 pm Post subject: Re: windshield brace wiring

I ran 2 RG400 coax and (at) 2 #18 conductors through the canopy brace with no problem. You can protect the wiring at the ends of the tubng with RTV or SHOE GOO.



Jim Berry

40482

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Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Fri Apr 09, 2010 1:52 pm Post subject: Re: windshield brace wiring

Will you be running significant (> 1 amp) current in these wires? Will you hang a compass on the center support post? If the answers are yes and yes, then you'll want to run a ground return line, as close as possible to the other wires, to minimize stray magnetic fields.

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