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wiring in conduit

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bobkuc(at)gmail.com
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Posted: Mon Nov 02, 2020 7:55 am Post subject: wiring in conduit

I have a conduit in the wings of my rv-7a.   Wire will be going through it for wingtip lights.  Also in the middle of the right wing I need to add wire for the roll servo and pitot and aoa wires in the left wing.

Do I cut the tube in the middle to separate to add the wires or do I just put a hole in the tube to add the wires?  Is it OK for the wire to be loose in the tube?  And lastly, what do I put in the ends of the tube to prevent chafing of the wires?  I was thinking either fill ends with hot glue or shoe glue or even duct sealant.



Thoughts.

Bob Kuc

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finn.usa(at)gmail.com
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Posted: Mon Nov 02, 2020 9:29 am Post subject: wiring in conduit

I used the corrugated conduit that Van's sell. I simply made a hole with 

a soldering iron (before pulling the wires!)



Actually cut the conduit at the inspection plate to get better access 

when riveting the wing skins and installing the bell crank.



Finn



On 11/2/2020 10:48 AM, Bob Kuc wrote:

 	  Quote: 	
		   I have a conduit in the wings of my rv-7a.   Wire will be going 

 through it for wingtip lights.  Also in the middle of the right wing I 

 need to add wire for the roll servo and pitot and aoa wires in the 

 left wing.



 Do I cut the tube in the middle to separate to add the wires or do I 

 just put a hole in the tube to add the wires? Is it OK for the wire to 

 be loose in the tube?  And lastly, what do I put in the ends of the 

 tube to prevent chafing of the wires?  I was thinking either fill ends 

 with hot glue or shoe glue or even duct sealant.



 Thoughts.



 Bob Kuc


	




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nuckolls.bob(at)aeroelect
Guest

Posted: Mon Nov 02, 2020 1:44 pm Post subject: wiring in conduit

At 09:48 AM 11/2/2020, you wrote:

  	  Quote: 	
		  I have a conduit in the wings of my rv-7a.  Wire will be going through it for wingtip lights.

 Also in the middle of the right wing I need to add wire for the roll servo and pitot and

 aoa wires in the left wing.



 Do I cut the tube in the middle to separate to add the wires or do I just put a

 hole in the tube to add the wires? 	


   A plastic or conduit I presume. A hole is recommended.

   In fact, you can make it quite large to facilitate

   pulling the wire into the tube. The conduit is simply

   for Z-axis support and routing convenience.



 Is it OK for the wire to be loose in the tube? 



   Yes



 And lastly, what do I put in the ends of the tube to prevent chafing

 of the wires?  I was thinking either fill ends with hot glue or shoe

 glue or even duct sealant.



   I would put a sleeve of heat shrink over the wire(s)

   extending into the conduit 6 inches or so at both

   the ends and the mid-tube exit. The things are not

   going to 'slide around' in there. Just bevel

   the edges of holes/exit points were wires emerge

   and buffer the bundles with h-s.



   Both wires and conduit are of similar durability/

   harness and not antagonistic to each other as long

   as there is no forcing . . . and a loose bundle

   is not forced. The conduit remains open for future

   access.



   Goops, goos, glues and other sticky stuffs are to

   be applied judiciously and avoided if there are

   more elegant choices. We had some really GOOD

   goo at Boeing back about 1961 . . . BMS513 . . .

   you could retread tires with that stuff. Everybody

   hated it for a variety of reasons. Except for

   tread sealants on certain plumbing fittings, it was

   to be avoided in the TC world.



 

   Bob . . .

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