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Fat wires out of cockpit????

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CardinalNSB(at)aol.com
Guest

Posted: Tue Sep 15, 2009 6:49 am Post subject: Fat wires out of cockpit????

First, this is a Cessna, not an experimental;  my ap is ok with this,  but will it help?

  

 Currently, the alternator output wire tuns from the alternator at rightside  forward of the engine, straight back to the firewall,  behind the engine to  the left (pilot's side) of the firewall, then into the cabin, then to the  extreme right side of the cockpit where it goes into a breaker about 3  inches from the right side fuselage outer skin.  The bottom of the breaker  feeds the bus, then at the end of the bus there is a a fat wire to the  ammeter just under the pilot's yoke, then back out the same hole through the  firewall, then down to the battery side of the starter contaactor.

  

 That seems like alot of wire.  I have to keep the cb in the  cockpit.  I wll use a stc va meter to replace the Cessna ammeter, and will  use a remote shunt, not allowed to rely only on a voltmeter.

  

 I am considering running the wire through the right side of the firewall to  the breaker, then back out of the breaker the same way it came in, then over to  the pilot side and tie into the starter contactor lug.  The bus would still  run off of the breaker.

  

 1.  Is there concern for the fat wires "cvoming and going" through the  same hole, should I twist them together, are there shielding issues?

  

 2.  Should the shunt be inside or outside the cabin?  Does the  shunt create electrical interference? 

  

 3.  If there is no downside to doing this I will do it for the  aesthetics and weight savings alone, since I am replacing the wiring  anyway. 

  

 Thank you, Skip

  

 

  [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Tue Sep 15, 2009 8:55 am Post subject: Fat wires out of cockpit????

At 09:36 AM 9/15/2009, you wrote:

  	  Quote: 	
		   First, this is a Cessna, not an experimental;  my ap is ok with this, but will it help?

  

 Currently, the alternator output wire tuns from the alternator at rightside forward of the engine, straight back to the firewall,  behind the engine to the left (pilot's side) of the firewall, then into the cabin, then to the extreme right side of the cockpit where it goes into a breaker about 3 inches from the right side fuselage outer skin.  The bottom of the breaker feeds the bus, then at the end of the bus there is a a fat wire to the ammeter just under the pilot's yoke, then back out the same hole through the firewall, then down to the battery side of the starter contaactor.

  

 That seems like alot of wire.  I have to keep the cb in the cockpit.  I wll use a stc va meter to replace the Cessna ammeter, and will use a remote shunt, not allowed to rely only on a voltmeter. 	


   Interesting . . . the voltmeter is the much

   preferred indicator of electrical system

   performance . . .

  	  Quote: 	
		    

 I am considering running the wire through the right side of the firewall to the breaker, then back out of the breaker the same way it came in, then over to the pilot side and tie into the starter contactor lug.  The bus would still run off of the breaker.

  

 1.  Is there concern for the fat wires "cvoming and going" through the same hole, should I twist them together, are there shielding issues? 	


    No, if you've not identified any wire proximity

    issues so far, there's little or no risk of keeping

    with the original design goals.



  	  Quote: 	
		    

 2.  Should the shunt be inside or outside the cabin?  Does the shunt create electrical interference? 	


    Where ever you like. Put it where it's easiest to

    access for installation. It's not a potential

    source of interference.



  	  Quote: 	
		    

 3.  If there is no downside to doing this I will do it for the aesthetics and weight savings alone, since I am replacing the wiring anyway. 	


    That ought to work.



 

        Bob . . .



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

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

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



     [quote][b]

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