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pitot heat wire gauge

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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Tue Jun 16, 2009 2:18 pm Post subject: pitot heat wire gauge

Can anyone offer an appropriate wire size to prewire for pitot heat, probably the Dynon unit?



Thanks in advance.

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_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

nuckolls.bob(at)aeroelect
Guest

Posted: Tue Jun 16, 2009 4:47 pm Post subject: pitot heat wire gauge

At 05:18 PM 6/16/2009, you wrote:

 	  Quote: 	
		  



Can anyone offer an appropriate wire size to prewire for pitot heat, 

probably the Dynon unit?



Thanks in advance.


	


   Most 14v pitot heaters use 9-11A of continuous

   running load (150W). Their inrush current is

   high and protracted. I'd go with a 20A fuse/

   breaker and 14AWG wire.

        Bob . . .



         ---------------------------------------

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

         ---------------------------------------

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rckol

Joined: 14 Nov 2008
Posts: 36

Posted: Tue Jun 16, 2009 5:51 pm Post subject: Re: pitot heat wire gauge

According to the Dynon manual, "The maximum draw of the heated pitot controller/probe is 10 amps."  which is a bit less than the typical heated pitot.  



They recommend at least a #14 wire for a 10'-16' run.



You can download the manual from their web site.

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