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Some AeroElectric Connection Questions

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Dan Reeves

Joined: 10 Jan 2006
Posts: 16

Posted: Wed May 30, 2007 9:54 am Post subject: Some AeroElectric Connection Questions

Bob,

   

  Thanks for all of the great training you provide both on the list and in your AeroElectric Connection!

   

  I am planning on using Z-11 to wire my RV-7A but using B&C's LR3C regulator in place of the Ford regulator, the AEC9005-101 low voltage monitor module, and the crowbar o.v. protection module since all 3 functions are built into the LR3C.

   

  I'm using Z-12 as a reference for the LR3C portion of the wiring and my question is why does the LR3C just require a 5A breaker between the bus and the master switch, whereas in the Z-11 setup a fusible link is required between the bus and the master switch and the breaker is then shown between the switch and regulator? 

   

  Also, on Z-11, the picture that shows the terminal locations for the S700-2-XX series of switches is numbered opposite to what is shown on page 11-16 of the AeroElectric  Connection and both mention keyway up.  Which is correct?

   

  Thanks again for all of your help!

   

  Dan Reeves

  RV-7A

   

   

   



           Park yourself in front of a world of choices in alternative vehicles.

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nuckollsr(at)cox.net
Guest

Posted: Thu May 31, 2007 7:06 am Post subject: Some AeroElectric Connection Questions

At 10:53 AM 5/30/2007 -0700, you wrote:



 	  Quote: 	
		  Bob,



Thanks for all of the great training you provide both on the list and in 

your AeroElectric Connection!



I am planning on using Z-11 to wire my RV-7A but using B&C's LR3C 

regulator in place of the Ford regulator, the AEC9005-101 low voltage 

monitor module, and the crowbar o.v. protection module since all 3 

functions are built into the LR3C.



I'm using Z-12 as a reference for the LR3C portion of the wiring and my 

question is why does the LR3C just require a 5A breaker between the bus 

and the master switch, whereas in the Z-11 setup a fusible link is 

required between the bus and the master switch and the breaker is then 

shown between the switch and regulator?


	


   Breakers and fuses protect wires. When you're wired with breakers

   at the bus bars, then EVERY WIRE extending from the bus bar

   is protected by the breaker. When you use fuse blocks and then

   EXTEND the bus by means of a wire from the fuse block to a breaker,

   then that piece of wire needs protection . . . i.e. fusible link.

   The fusible link is weak enough to protect the wire but robust enough

   to open the breaker before befor the link opens.



 	  Quote: 	
		  

Also, on Z-11, the picture that shows the terminal locations for the 

S700-2-XX series of switches is numbered opposite to what is shown on page 

11-16 of the AeroElectric Connection and both mention keyway up.  Which is 

correct?


	


   See note 15 in Appendix Z and

http://aeroelectric.com/articles/Carling_Micro/Carling_Micro.pdf



 	  Quote: 	
		  

Thanks again for all of your help!


	


   You're welcome sir!



   Bob . . .

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Dan Reeves

Joined: 10 Jan 2006
Posts: 16

Posted: Tue Jun 12, 2007 7:04 am Post subject: Some AeroElectric Connection Questions

Thanks Bob!

   

  I gotcha now,,,,I understand the need for the fusible link to protect the wire that in essence extends the buss (fuse block) to the breaker...versus the other setup where the breaker is right on the buss itself,,,I love it when the light bulb in my head finally goes on.  Thanks for throwing the switch so to speak.

   

  But,,,that just leads to another question,,,how are the wires from the battery to the battery buss to the diode to the E-buss protected?  Seems like a good place for a fusible link as well.  I'm sticking to the drawings but would like to understand how or if these wires get protected.



  Thanks!

  Dan

  

"Robert L. Nuckolls, III" <nuckollsr(at)cox.net> wrote:

  [quote]--> AeroElectric-List  message posted by: "Robert L. Nuckolls, III" 



At 10:53 AM 5/30/2007 -0700, you wrote:



 	  Quote: 	
		  Bob,



Thanks for all of the great training you provide both on the list and in 

your AeroElectric Connection!



I am planning on using Z-11 to wire my RV-7A but using B&C's LR3C 

regulator in place of the Ford regulator, the AEC9005-101 low voltage 

monitor module, and the crowbar o.v. protection module since all 3 

functions are built into the LR3C.



I'm using Z-12 as a reference for the LR3C portion of the wiring and my 

question is why does the LR3C just require a 5A breaker between the bus 

and the master switch, whereas in the Z-11 setup a fusible link is 

required between the bus and the master switch and the breaker is then 

shown between the switch and regulator?


	


Breakers and fuses protect wires. When you're wired with breakers

at the       Need a vacation? [url=http://us.rd.yahoo.com/evt=48256/*http://travel.yahoo.com/;_ylc=X3oDMTFhN2hucjlpBF9TAzk3NDA3NTg5BHBvcwM1BHNlYwNncm91cHMEc2xrA2VtYWlsLW5jbQ--]Get great deals  to amazing places [/url]on Yahoo! Travel.  [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Tue Jun 12, 2007 8:20 am Post subject: Some AeroElectric Connection Questions

At 08:02 AM 6/12/2007 -0700, you wrote:



 	  Quote: 	
		  Thanks Bob!



I gotcha now,,,,I understand the need for the fusible link to protect the 

wire that in essence extends the buss (fuse block) to the breaker...versus 

the other setup where the breaker is right on the buss itself,,,I love it 

when the light bulb in my head finally goes on.  Thanks for throwing the 

switch so to speak.



But,,,that just leads to another question,,,how are the wires from the 

battery to the battery buss to the diode to the E-buss protected?  Seems 

like a good place for a fusible link as well.  I'm sticking to the 

drawings but would like to understand how or if these wires get protected.


	




The "rule of thumb" for whether or not wires get/need

protected considers two things:



(1) size of wire and likelihood of added value for protection

- this study shows that the FAT wires between various major

components (battery, battery contactor, bus, starter contactor,

starter) do not benefit from added protection in light aircraft.



(2) length of wire - small wires (14AWG or so and smaller) of

less than 6" in length and not tied into bundles of other

wires do not pose a hazard if left "unprotected". Wires

in the z-figures marked with a (*) are intended to be

short feeders . . . I may have missed getting all such

wires so marked.



See FAR23.1365 and 23.1357



        Bob . . .



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

        ( "Physics is like sex: sure, it may   )

        ( give some practical results, but     )

        ( that's not why we do it."            )

        (                                      )

        (                 Richard P. Feynman   )

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

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