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Firewall Pass Through w/Service Loop Concept

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robin(at)PaintTheWeb.com
Guest

Posted: Thu Aug 05, 2010 5:10 pm Post subject: Firewall Pass Through w/Service Loop Concept

Having recently had to re-wire and reconfigure some electrical on both sides of my firewall I am convinced there is a simpler (but more expensive) way to access wires coming through the firewall.  

My current configuration are a couple of Cannon or Amphenol connectors used as my firewall pass through. I assume most of us have a similar configuration. While this is not too difficult as one is building, changes after flying can be extremely difficult due to all the “aviation” crap in the way. The firewall side can be difficult but the upside down and backwards nature of under panel repairs begs for a better solution. It seems like a simple service loop on both sides of the panel would be a easy fix. The service loop of 12-18” would allow one to remotely mount the connector(s) to a position of better access. Or firewall mounting with a release bracket to give better access to the wires.   

My ideal setup would be either 36-48 pre-wired jumper lengths. Maybe all one gauge wire or half one gauge, half smaller gauge wires. A couple of pass through units should be enough to solve most wiring issues.  

My question is… Does this solution already exist or are people doing something else to solve this challenge that I don’t know about?  

   

Robin  

   

[img]cid:image001.jpg(at)01CB34C9.26005D20[/img]

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ceengland(at)bellsouth.ne
Guest

Posted: Thu Aug 05, 2010 5:25 pm Post subject: Firewall Pass Through w/Service Loop Concept

On 8/5/2010 8:08 PM, Robin Marks wrote:

 	  Quote: 	
		  

 Having recently had to re-wire and reconfigure some electrical on both 

 sides of my firewall I am convinced there is a simpler (but more 

 expensive) way to access wires coming through the firewall.



 My current configuration are a couple of Cannon or Amphenol connectors 

 used as my firewall pass through. I assume most of us have a similar 

 configuration. While this is not too difficult as one is building, 

 changes after flying can be extremely difficult due to all the 

 “aviation” crap in the way. The firewall side can be difficult but the 

 upside down and backwards nature of under panel repairs begs for a 

 better solution. It seems like a simple service loop on both sides of 

 the panel would be a easy fix. The service loop of 12-18” would allow 

 one to remotely mount the connector(s) to a position of better access. 

 Or firewall mounting with a release bracket to give better access to 

 the wires.



 My ideal setup would be either 36-48 pre-wired jumper lengths. Maybe 

 all one gauge wire or half one gauge, half smaller gauge wires. A 

 couple of pass through units should be enough to solve most wiring issues.



 My question is… Does this solution already exist or are people doing 

 something else to solve this challenge that I don’t know about?



 Robin



Valid concept to ease servicing, but the firewall pass-through 
	


connectors could be eliminated. Just use the stainless tube idea (as 

seen on this list) & run the wire continuous from the engine side to the 

cockpit side connector.

Charlie

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kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Thu Aug 05, 2010 6:49 pm Post subject: Firewall Pass Through w/Service Loop Concept

Robin

Keep in mind that the firewall serves to protect you in the diving of an engine compartment fire. My guess is that the AMP plug would be gone in seconds and then you would have all sorts of nasties coming through. 

Cheers

Les



Sent from my iPhone



On 2010-08-05, at 7:08 PM, Robin Marks <robin(at)PaintTheWeb.com (robin(at)PaintTheWeb.com)> wrote:



[quote]    

Having recently had to re-wire and reconfigure some electrical on both sides of my firewall I am convinced there is a simpler (but more expensive) way to access wires coming through the firewall.  

My current configuration are a couple of Cannon or Amphenol connectors used as my firewall pass through. I assume most of us have a similar configuration. While this is not too difficult as one is building, changes after flying can be extremely difficult due to all the â€œaviationâ€ crap in the way. The firewall side can be difficult but the upside down and backwards nature of under panel repairs begs for a better solution. It seems like a simple service loop on both sides of the panel would be a easy fix. The service loop of 12-18â€ would allow one to remotely mount the connector(s) to a position of better access. Or firewall mounting with a release bracket to give better access to the wires.   

My ideal setup would be either 36-48 pre-wired jumper lengths. Maybe all one gauge wire or half one gauge, half smaller gauge wires. A couple of pass through units should be enough to solve most wiring issues.  

My question isâ€¦ Does this solution already exist or are people doing something else to solve this challenge that I donâ€™t know about?  

   

Robin  

   

[img]cid:image001.jpg(at)01CB34C9.26005D20[/img]   

     

[b]

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robin(at)PaintTheWeb.com
Guest

Posted: Thu Aug 05, 2010 7:11 pm Post subject: Firewall Pass Through w/Service Loop Concept

Les, if that reply is in reference to my concept I don’t see the functional difference between mine the traditional construction. The firewall is unchanged from most builds, a standard Cannon or Amphenol connection as your physical pass through. I am just trying to extend the reach of the plugs for easier access.  

   

Thanks,  

Robin    

       

From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of Les Kearney

 Sent: Thursday, August 05, 2010 7:13 PM

 To: rv-list(at)matronics.com (rv-list(at)matronics.com)

 Subject: Re: Firewall Pass Through w/Service Loop Concept  

  

  

     

Robin  

    

   

    

Keep in mind that the firewall serves to protect you in the diving of an engine compartment fire. My guess is that the AMP plug would be gone in seconds and then you would have all sorts of nasties coming through.   

    

   

    

Cheers  

    

   

    

Les

 

 Sent from my iPhone  

    



 On 2010-08-05, at 7:08 PM, Robin Marks <robin(at)PaintTheWeb.com (robin(at)PaintTheWeb.com)> wrote:  

   	  Quote: 	
		        

Having recently had to re-wire and reconfigure some electrical on both sides of my firewall I am convinced there is a simpler (but more expensive) way to access wires coming through the firewall.  

My current configuration are a couple of Cannon or Amphenol connectors used as my firewall pass through. I assume most of us have a similar configuration. While this is not too difficult as one is building, changes after flying can be extremely difficult due to all the “aviation” crap in the way. The firewall side can be difficult but the upside down and backwards nature of under panel repairs begs for a better solution. It seems like a simple service loop on both sides of the panel would be a easy fix. The service loop of 12-18” would allow one to remotely mount the connector(s) to a position of better access. Or firewall mounting with a release bracket to give better access to the wires.   

My ideal setup would be either 36-48 pre-wired jumper lengths. Maybe all one gauge wire or half one gauge, half smaller gauge wires. A couple of pass through units should be enough to solve most wiring issues.  

My question is… Does this solution already exist or are people doing something else to solve this challenge that I don’t know about?  

   

Robin  

   

[img]cid:image001.jpg(at)01CB34C9.26005D20[/img]   

  

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pitts_pilot(at)bellsouth.
Guest

Posted: Fri Aug 06, 2010 2:37 am Post subject: Firewall Pass Through w/Service Loop Concept

I think that the real answer to your question would be to use the tube method as mentioned, and use one long wire through the firewall.  No need for the firewall connectors in that case.  Especially if you plan to re-wire the connectors to extend them.   If you decide to go the  tube route,  use a q-tip to  spread a thin film of red silicone inside the tube.  When all the wires are in, fill the forward end with red silicone .... not the whole tube.  Makes it easier to add more wires later.  If you just extend the wires from the bulkhead, you still have the same problem when you go to add wires ..... and you pay a cost and weight penalty.  The weight is not much (cost is) but it all adds up.

 Linn

 

 Robin Marks wrote: [quote]                   

Les, if that reply is in reference to my concept I don’t see the functional difference between mine the traditional construction. The firewall is unchanged from most builds, a standard Cannon or Amphenol connection as your physical pass through. I am just trying to extend the reach of the plugs for easier access.   

    

Thanks,   

Robin     

    

 [b]

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