Today's Message Index:
----------------------
1. 10:56 AM - Wire Installation Guidelines (Jeff Luckey)
2. 01:02 PM - Re: Wire Installation Guidelines (mark harris)
3. 02:42 PM - Re: Wire Installation Guidelines (Charlie England)
4. 05:27 PM - Re: Wire Installation Guidelines (ashleysc@broadstripe.net)
5. 10:02 PM - Re: Wire Installation Guidelines (Eric Page)
Message 1
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| Subject: | Wire Installation Guidelines |
What are the "rules" for running wires along longerons in aluminum airframe
s?
I see things like:
1. simply ty-rapping the wire to the longeron every 12 to 18 inches.=C2-
I see this mostly in Experimentals.
2. using an Adell clamp, at that same interval, for wire bundles and someti
mes even for single conductor.=C2- Typically in certified aircraft and ai
rliners/biz jets/military helos, etc.
Back when I was a kid, I was helping a friend wire a racing motorcycle and
ty-rapped a wire directly to the frame of the bike and promptly got chewed-
out.=C2- Apparently using that installation technique is verboten because
it causes the wire to chafe against the frame with the high-frequency vibr
ations coming from racing engines.
Which way is "the right way"?
-Jeff
Message 2
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| Subject: | Re: Wire Installation Guidelines |
2
Sent from Outlook for iOS<https://aka.ms/o0ukef>
________________________________
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list
-server@matronics.com> on behalf of Jeff Luckey <jluckey@pacbell.net>
Sent: Wednesday, October 11, 2023 6:55:34 PM
Subject: AeroElectric-List: Wire Installation Guidelines
What are the "rules" for running wires along longerons in aluminum airframe
s?
I see things like:
1. simply ty-rapping the wire to the longeron every 12 to 18 inches. I see
this mostly in Experimentals.
2. using an Adell clamp, at that same interval, for wire bundles and someti
mes even for single conductor. Typically in certified aircraft and airline
rs/biz jets/military helos, etc.
Back when I was a kid, I was helping a friend wire a racing motorcycle and
ty-rapped a wire directly to the frame of the bike and promptly got chewed-
out. Apparently using that installation technique is verboten because it c
auses the wire to chafe against the frame with the high-frequency vibration
s coming from racing engines.
Which way is "the right way"?
-Jeff
Message 3
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| Subject: | Re: Wire Installation Guidelines |
Or at least not 1 (at least as stated), for the reason given in 2. ;-)
Adel clamps are the traditional way, but there are other techniques to
space the wire away from the structure.
On 10/11/2023 3:01 PM, mark harris wrote:
> 2
>
> Sent from Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------------------------------------------------
> *From:* owner-aeroelectric-list-server@matronics.com
> <owner-aeroelectric-list-server@matronics.com> on behalf of Jeff
> Luckey <jluckey@pacbell.net>
> *Sent:* Wednesday, October 11, 2023 6:55:34 PM
> *To:* Aeroelectric List <aeroelectric-list@matronics.com>
> *Subject:* AeroElectric-List: Wire Installation Guidelines
> What are the "rules" for running wires along longerons in aluminum
> airframes?
>
>
> I see things like:
>
> 1. simply ty-rapping the wire to the longeron every 12 to 18 inches.
> I see this mostly in Experimentals.
> 2. using an Adell clamp, at that same interval, for wire bundles and
> sometimes even for single conductor. Typically in certified aircraft
> and airliners/biz jets/military helos, etc.
>
> Back when I was a kid, I was helping a friend wire a racing motorcycle
> and ty-rapped a wire directly to the frame of the bike and promptly
> got chewed-out. Apparently using that installation technique is
> verboten because it causes the wire to chafe against the frame with
> the high-frequency vibrations coming from racing engines.
>
> Which way is "the right way"?
>
>
> -Jeff
>
>
--
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Message 4
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| Subject: | Re: Wire Installation Guidelines |
Hi Mark and Charlie;
Adel clamps are ideal, but it takes two, one to surround a bundle of wires and
one to mount them to a piece of structure (tubing for instance. Things can get
quite Adel Clamp heavy and congested.
My compromise was to use two turns of Rescue Tape (silicone tape) around the bundle
of wires and two turns around the structural element. Then tie wire the two
bundles together so that rescue tape contacts rescue tape. Since the rescue
tape cures to itself, there will be no relative motion due to vibration, and
each is protected (wire and structure). In the fuselage and wings I used black
nylon wire ties. In the engine compartment I used stainless-steel wire ties.
Note: As stated, the rescue tape protects both the wires and structure from the
stainless-steel wire ties. You will find this is a weight savings, is quicker,
and less expensive. My EAA Technical Adviser and the FAA DAR found no fault
with this approach.
Cheers! Stu.
From: "Charlie England" <ceengland7@gmail.com>
Sent: Wednesday, October 11, 2023 2:46:27 PM
Subject: Re: AeroElectric-List: Wire Installation Guidelines
Or at least not 1 (at least as stated), for the reason given in 2. ;-)
Adel clamps are the traditional way, but there are other techniques to space the
wire away from the structure.
On 10/11/2023 3:01 PM, mark harris wrote:
2
Sent from [ https://aka.ms/o0ukef | Outlook for iOS ]
From: [ mailto:owner-aeroelectric-list-server@matronics.com | owner-aeroelectric-list-server@matronics.com ] [ mailto:owner-aeroelectric-list-server@matronics.com | <owner-aeroelectric-list-server@matronics.com> ] on behalf of Jeff Luckey [ mailto:jluckey@pacbell.net | <jluckey@pacbell.net> ]
Sent: Wednesday, October 11 , 2023 6:55:34 PM
Subject: AeroElectric-List: Wire Installation Guidelines
What are the "rules" for running wires along longerons in aluminum airframes?
I see things like:
1. simply ty-rapping the wire to the longeron every 12 to 18 inches. I see this
mostly in Experimentals.
2. using an Adell clamp, at that same interval, for wire bundles and sometimes
even for single conductor. Typically in certified aircraft and airliners/biz jets/military
helos, etc.
Back when I was a kid, I was helping a friend wire a racing motorcycle and ty-rapped
a wire directly to the frame of the bike and promptly got chewed-out. Apparently
using that installation technique is verboten because it causes the wire
to chafe against the frame with the high-frequency vibrations coming from
racing engines.
Which way is "the right way"?
-Jeff
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Message 5
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| Subject: | Re: Wire Installation Guidelines |
And, if you need to stand the wire bundle off from the structure, just cut a short
length of rubber hose (1/4" ID works well) of exactly the length you need.
Pass the zip tie through the rubber hose, around the tape-wrapped structural
member, back through the hose, then close it around the wire bundle.
Incidentally, "rescue tape" is just one brand name for common self-fusing silicone
tape. Aircraft Spruce carries it under the "Uni-Wrap" brand, and it's also
available generically on eBay or Amazon. Just search for "self fusing silicone
tape."
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511588#511588
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