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CB Power Source

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Speedy11(at)aol.com
Guest

Posted: Wed Aug 02, 2006 4:06 pm Post subject: CB Power Source

I am using circuit breakers in my electrical system.

 I had planned to use copper bars to provide power to the "line" side of the CBs.

 However, it seems that would make maintenance more difficult if I needed to remove only one CB.

 SO, what do you think about using jumper wires from CB to CB to provide power to the CBs?  Maybe use #12 AWG to carry the load.

 Has anyone done that?  Any issues?

 Stan Sutterfield

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FLYaDIVE(at)aol.com
Guest

Posted: Wed Aug 02, 2006 6:51 pm Post subject: CB Power Source

In a message dated 8/2/06 8:09:51 PM Eastern Daylight Time, Speedy11(at)aol.com 

writes:



 	  Quote: 	
		   I am using circuit breakers in my electrical system.

  I had planned to use copper bars to provide power to the "line" side of 

the 
	


 	  Quote: 	
		    CBs.

  However, it seems that would make maintenance more difficult if I needed 

to 
	


 	  Quote: 	
		    remove only one CB.

  SO, what do you think about using jumper wires from CB to CB to provide 

 power 

  to the CBs?  Maybe use #12 AWG to carry the load.

  Has anyone done that?  Any issues?

  Stan Sutterfield

=============================
	


Stan:



There is nothing wrong with that, the procedure works very well.  

A little trick is to use one continuous length of wire, no cuts, no splices.  

Leave enough bare wire between each CB to form a nice loop and so that you 

can fold it back on itself and insert it into a ring lug.  Low resistance, solid 

mechanical connection, looks good and as you said, easy to maintain.



Barry

"Chop'd Liver"



"Show them the first time, correct them the second time, kick them the third 

time." 

Yamashiada

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nuckollsr(at)cox.net
Guest

Posted: Wed Aug 02, 2006 7:22 pm Post subject: CB Power Source

At 08:03 PM 8/2/2006 -0400, you wrote:



 	  Quote: 	
		  I am using circuit breakers in my electrical system.

I had planned to use copper bars to provide power to the "line" side of 

the CBs.


	


  Suggest brass strip available from hobby shops. MUCH easier

  to work with than copper.



 	  Quote: 	
		  However, it seems that would make maintenance more difficult if I needed 

to remove only one CB.

SO, what do you think about using jumper wires from CB to CB to provide 

power to the CBs?  Maybe use #12 AWG to carry the load.

Has anyone done that?


	


   Yup . . .

 	  Quote: 	
		     Any issues?


	


   Yup . . . the definition of a "bus" is a conductor with multiple

   taps for power distribution that are totally independent of each

   other. Loss of one tap has no effect on the remainder of the system.



   See:



http://www.aeroelectric.com/Pictures/Breakers/Bus_Bar_Not_1.jpg



http://www.aeroelectric.com/Pictures/Breakers/Bus_Bar_Not_3.jpg



http://www.aeroelectric.com/Pictures/Breakers/Bus_Bar_Not_2.jpg

   Here's an example of a non-bussed assembly taken from an

   old Piper. Note the 3-piece "bus bar" . . . if a screw

   loosens at one of these joints, you loose not only the

   breaker fed with the loose screw but every thing downstream

   as well.



   A "real" bus is a contiguous conductor with holes for each

   tap that feeds and affects one and only one breaker.



   Bob . . .

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

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

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

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Speedy11(at)aol.com
Guest

Posted: Thu Aug 03, 2006 7:21 am Post subject: CB Power Source

My appreciation to Bob and Chop'd Liver0for their advice regarding powering circuit breakers.

 Stan Sutterfield

 Do not archive

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nuckollsr(at)cox.net
Guest

Posted: Thu Aug 03, 2006 6:48 pm Post subject: CB Power Source

At 10:46 PM 8/2/2006 -0400, you wrote:



 	  Quote: 	
		  



In a message dated 8/2/06 8:09:51 PM Eastern Daylight Time, Speedy11(at)aol.com

writes:



 > I am using circuit breakers in my electrical system.

 >  I had planned to use copper bars to provide power to the "line" side of

the

 >  CBs.

 >  However, it seems that would make maintenance more difficult if I needed

to

 >  remove only one CB.

 >  SO, what do you think about using jumper wires from CB to CB to provide

 > power

 >  to the CBs?  Maybe use #12 AWG to carry the load.

 >  Has anyone done that?  Any issues?

 >  Stan Sutterfield

=============================

Stan:



There is nothing wrong with that, the procedure works very well.

A little trick is to use one continuous length of wire, no cuts, no splices.

Leave enough bare wire between each CB to form a nice loop and so that you

can fold it back on itself and insert it into a ring lug.  Low resistance, 

solid

mechanical connection, looks good and as you said, easy to maintain.


	


    Generally the cross section of a "bus" conductor is sized for

    the alternator capacity of the airplane. If you use wire as suggested,

    then the terminals to accept the doubled-over wires get pretty hoggy.

    The terminals and service loops hang way outside the mounting footprint

    of the breakers.



    99.9% plus of all breakers installed on all airplanes go the lifetime

    of the airplane never being called upon to "trip" nor do they require

    a maintenance action. Solid bus bars as described earlier have been

    used on tens of thousands of aircraft. I guarantee you that ten years

    from now "breaker replacement" will be WAaaaayyyy down on the list

    of service expenses for your airplane.

     Bob . . .



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

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

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

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Speedy11(at)aol.com
Guest

Posted: Sun Aug 06, 2006 11:15 pm Post subject: CB Power Source

Good point, Bob.  Thanks.  I'll use the bus bars.

 Stan Sutterfield

 Do not archive

  

  

  	  Quote: 	
		      99.9% plus of all breakers installed on all airplanes go the lifetime

    of the airplane never being called upon to "trip" nor do they require

    a maintenance action. Solid bus bars as described earlier have been

    used on tens of thousands of aircraft. I guarantee you that ten years

    from now "breaker replacement" will be WAaaaayyyy down on the list

    of service expenses for your airplane.

- 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:

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