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Earth return

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JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Mon Mar 26, 2007 6:07 am Post subject: Earth return

Hi Guys



Can you please confirm that it is good (aircraft) practice to have in 

addition to an earth return wire to the main earth 'bus' a local earth 

connection, for example, at the wing tip for the navigation and landing 

lights.



Best regards - John

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Neal.George(at)hurlburt.a
Guest

Posted: Mon Mar 26, 2007 6:48 am Post subject: Earth return

John - 



Bob has often suggested that simple resistive loads such as lights and

pitot heat are perfect candidates for local airframe grounding - and

that's exactly what I did.  

Neal George

RV-7 N8ZG (Contemplating the Cowling)

Z13-8 (Do we ever really finish wiring ?)




--> <jmtipton(at)btopenworld.com>



Hi Guys



Can you please confirm that it is good (aircraft) practice to have in

addition to an earth return wire to the main earth 'bus' a local earth

connection, for example, at the wing tip for the navigation and landing

lights.



Best regards - John

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KeithHallsten(at)quiknet.
Guest

Posted: Tue Mar 27, 2007 7:33 am Post subject: Earth return

John,  

  

Each circuit needs only one ground.  The advantage of using a local (airframe) ground in a metal airplane is that a separate ground wire need not be threaded through the structure.  If you elect to use a separate ground wire then there is no advantage to using a local ground.  In fact, there may be a disadvantage because the possibility of ground loops would then exist.  

Regards,  

Keith Hallsten  

Roseville, CA  

  

John Tipton wrote:  

Hi Guys  

Can you please confirm that it is good (aircraft) practice to have in   

addition to an earth return wire to the main earth 'bus' a local earth   

connection, for example, at the wing tip for the navigation and landing   

lights.  

Best regards - John   

     [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Wed Mar 28, 2007 3:04 am Post subject: Earth return

At 08:33 AM 3/27/2007 -0700, you wrote:



 	  Quote: 	
		  John,



Each circuit needs only one ground.  The advantage of using a local 

(airframe) ground in a metal airplane is that a separate ground wire need 

not be threaded through the structure.  If you elect to use a separate 

ground wire then there is no advantage to using a local ground.  In fact, 

there may be a disadvantage because the possibility of ground loops would 

then exist.



Regards,



Keith Hallsten


	


   Good catch Keith. I'd missed the "in addition" phrase

   in his query.



   Bob . . .

 	  Quote: 	
		  Roseville, CA



John Tipton wrote:



Hi Guys



Can you please confirm that it is good (aircraft) practice to have in



addition to an earth return wire to the main earth 'bus' a local earth



connection, for example, at the wing tip for the navigation and landing



lights.



Best regards - John

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

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