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engine compartment wiring

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icubob(at)newnorth.net
Guest

Posted: Sat Aug 23, 2008 4:24 am Post subject: engine compartment wiring

hi all, what is everyone doing to secure wires in  the engine compartment?  wire ties rated for the high temp. are made of  gold [or petroleum products]. are the ''lacing '' materials  suitable?

  any input is appreciated.

                                                    bob noffs

                                                   woodruff, wi.

    [quote][b]

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rshannon

Joined: 05 Sep 2007
Posts: 62

Posted: Sat Aug 23, 2008 6:17 am Post subject: engine compartment wiring

On Sat, Aug 23, 2008 at 5:20 AM, bob noffs <icubob(at)newnorth.net (icubob(at)newnorth.net)> wrote:

 	  Quote: 	
		          hi all, what is everyone doing to secure wires in  the engine compartment?  wire ties rated for the high temp. are made of  gold [or petroleum products]. are the ''lacing '' materials  suitable?

  any input is appreciated.

                                                    bob noffs

                                                   woodruff, wi.



	




Bob,



As you know, there are several considerations, including potential damage from vibration, chafe, high heat, fire, etc. I have used fire retardant loom/spiral wrap and/or sleeving for all significant bundles, and everything on or near the engine -- mostly tied together and tied down with Tefzel tie wraps from Steinair. In two locations, I've supported large, enclosed bundles with double Adel clamps, in both cases to ensure clearance from things below (a mixture cable, and an intake hose.) For two wire bundles on the firewall (both inside fire retardant materials) I've used single Adel clamps. One small wire bundle (oil pressure & temp) that runs under the cylinder heads and not too far from exhaust pipes is in Thermo-Sleeve, for extra protection from constant high heat in that area.

 

Normal lacing is not appropriate for FWF, where it can get quite hot even in normal operation, to say nothing of fire situations.



By all means, consider the wiring standards in AC43.13. They include standoffs, separation from fuel lines or other plumbing & heat sources, mounting requirements, bend radius issues, etc. You may want to depart from some of those standards here and there, but it's a good place to start. There are several pictures of my FWF wiring, which is nearing completion, on my web site.

 

Ron

http://n254mr.com



  [quote][b]

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klehman(at)albedo.net
Guest

Posted: Sat Aug 23, 2008 7:12 am Post subject: engine compartment wiring

Bob

FWIW I used Adel clamps for heavy cables, bundles, and where it seemed 

appropriate. With dual EFI, I have a lot of wiring and I've had no 

problem at all where I've tied things with lacing. I also have a fair 

bit of the silicone self adhering tape protecting things where there is 

risk of chafing. In fact silicone tape under the lacing seems to work 

well as the lacing then grips well and there is no chafing that I can 

detect. I guess I have one or two nylon wire ties as well (silicone tape 

under them) but they have stood up fine for a couple of years now. They 

are not exposed to exhaust radiant heat. After looking carefully at some 

certified installations, I concluded that almost anything you are happy 

with is probably just fine if you inspect it occasionally...

Ken



bob noffs wrote:

 	  Quote: 	
		   hi all, what is everyone doing to secure wires in the engine 

 compartment?  wire ties rated for the high temp. are made of gold [or 

 petroleum products]. are the ''lacing '' materials suitable?

  any input is appreciated.

                                                   bob noffs

                                                  woodruff, wi.

- 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:

http://www.matronics.com/Navigator?AeroElectric-List

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