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Securing Wiring From Wing Conduit
Hello,
I am looking for some feedback on properly securing wiring from the wing conduit. Here is an example of how I secured the stall warning wiring: ![]() I am having trouble finding some solid examples based on acceptable practices and did not find any guidance from VANs. I cut a slot in the conduit and protected the wire at the slot with heat shrink and routed it as you see with tie-wraps. Does this look acceptable? Any suggestions? Thanks. |
My only concern is that particular tubing has very sharp edges when cut. You will probably be ok with the heat shrink protection and the Tefzel insulation is pretty tough. I am not a big fan of the double stick zip tie mounts. I prefer the type that has a hole in the center to secure them to structure.
Being pretty nit picky here. I think overall this is pretty clean and would probably not present any problems down the line. |
Wing conduit
Welcome.
Only my preference, but I don't care for adhesive anchors or tie straps. Over time the plastic hardens and cracks. I use adel clamps secured with a platenut. On my conduit, I used a pencil soldering iron to drill holes for wires. That said, I don't think there's anything wrong with your solution. I've seen others do similar. |
Maybe a slight highjacking of the thread, but what are the best methods for securing wire [b]inside[b] of the conduit? I'm in the process of installing a heated pitot and will run wires for power through the conduit. Eventually there will be other wires pulled for lighting, etc. Do you secure the various bundles (pitot, lighting) separately then pull them through? Do the bundles just flop around inside the conduit?
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One potential problem..
..is that the location you've chosen for your wire to penetrate the spar web might conflict with your aileron pushrod. You don't want the wire (or anything else) rubbing or potentially catching the pushrod.
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I chose to bundle mine, de-rated appropriately, and used short bands of heat shrink instead of type wraps. You could also lace them. Tie wraps get in the way inside the conduit if you want to pull more wired or bundles later. However, I do not think any harm would come from loose wires moving around in the conduit. What is important is that your conduits are faired properly or use appropriate anti-chafing techniques at the entry and exits, like heat shrink or a Heyco bushing glued in. |
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Thanks Jon
I was also thinking of heat shrink tubing to combine the wires of the various bundles and will use something for anti-chafing.
So basically the bundles are ok to flop around in the conduit. A lot to learn as I move forward towards the fuss build and panel/firewall. |
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I am also reconsidering the use of the double sided tape mounting bases. I will probably use #6 screws with adel clamps or a tie wrap base with a center hole. Thanks everyone for the comments. |
Click Bond
You could also use Click Bond tie wrap bases like these.
http://www.aircraftspruce.com/catalo...s/04-06000.php We use these to hold the Tracker cable on the new AH-64E Apache Helmet (AAIH) we make at work. The are used on the C-17 too. |
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I have found that the cable tie mounts work quite well if you remove the double sided tape and substitute a dab of shoe goo/E5000 adhesive.
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Edit: Actually, I just thought about it... I didn't even drill the hole where I did this, there was a convenient unused #30 rivet or tooling hole that just happened to be in the spot where I needed it. |
The sticky back nylon squares will fall off much sooner if the aluminum surface is not first cleaned with solvent.
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