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Shielded cable

 
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alec(at)alecmyers.com
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PostPosted: Fri Feb 02, 2018 5:16 am    Post subject: Shielded cable Reply with quote

Can anyone help:

What’s the go-to equivalent milspec number to 22759/16 for avionics hookups, except shielded?


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PostPosted: Fri Feb 02, 2018 6:34 am    Post subject: Shielded cable Reply with quote

At 07:14 AM 2/2/2018, you wrote:
Quote:
--> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com>

Can anyone help:

What’s the go-to equivalent milspec number to 22759/16 for avionics hookups, except shielded?

'commercial' equivalents are going to be hard to
find. if anyone goes to the effort to tool up
for ETFE insulation, there's little value to
be had for offering a less-than-military grade.

Another procurement problem is price breaks for
quantity. It doesn't take much total wire to
wire up your airplane . . . perhaps a few hundred
feet. But if you need multiple gages and perhaps
find value in color coded wires, then you find
yourself looking to procure lots of short lengths
of multiple sizes and colors.

From a sellers standpoint, it takes more
labor to pick, pack, ship and sell a 10 foot
chunk of 6AWG wire than it does for a 500' foot
spool. The 500' spool is shipment ready . . .
the short chunk has to be spooled of, measured,
cut, packaged and perhaps marked . . . then the
seller is 'stuck' with a 490' spool of wire that
can no longer be sold as it's original, bulk
price offering.

Been there, done that, still have spools of wire
on the shelf that I'm going to have to pass off
to someone who wants to be in the short-chunks
business.

Our legacy short-chunks guys are B&C and SteinAir.
There are offerings on eBay like this

https://goo.gl/AmmFsV


CAUTION: 22759 INCLUDES slash numbers that
call out PTFE (Teflon) as opposed to ETFE
(Tefzel). Make sure your eBay seller knows
which insulation is on hand so you can get
the right one.

Finally, a google search on 22759 is going
to yield you a million+ hits . . .



Bob . . .


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alec(at)alecmyers.com
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PostPosted: Fri Feb 02, 2018 6:43 am    Post subject: Shielded cable Reply with quote

Bob

I want the military grade. My supplier of choice is Allied Wire and Cable - but I don’t know which of their offerings to look at. When I want unshielded I go for 22759/16 but I don’t know what the shielded equivalent is.

Aircraft spruce sells M27500, but AWC lists several different kinds with different insulations, PTFE, FEP, ETFE:
http://www.awcwire.com/producttoc.aspx?id=m27500-cables

I think the choice is between RC-09 (FEP) and RC-06 (PTFE). Does it make any difference? Or should I use something else?

I just don’t want raised eyebrows and a sucking-in of breath over beer at the aircraft wiring club bar if I say what I used.


On Feb 2, 2018, at 9:33 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:

At 07:14 AM 2/2/2018, you wrote:
Quote:


Can anyone help:

What’s the go-to equivalent milspec number to 22759/16 for avionics hookups, except shielded?

'commercial' equivalents are going to be hard to
find. if anyone goes to the effort to tool up
for ETFE insulation, there's little value to
be had for offering a less-than-military grade.

Another procurement problem is price breaks for
quantity. It doesn't take much total wire to
wire up your airplane . . . perhaps a few hundred
feet. But if you need multiple gages and perhaps
find value in color coded wires, then you find
yourself looking to procure lots of short lengths
of multiple sizes and colors.

From a sellers standpoint, it takes more
labor to pick, pack, ship and sell a 10 foot
chunk of 6AWG wire than it does for a 500' foot
spool. The 500' spool is shipment ready . . .
the short chunk has to be spooled of, measured,
cut, packaged and perhaps marked . . . then the
seller is 'stuck' with a 490' spool of wire that
can no longer be sold as it's original, bulk
price offering.

Been there, done that, still have spools of wire
on the shelf that I'm going to have to pass off
to someone who wants to be in the short-chunks
business.

Our legacy short-chunks guys are B&C and SteinAir.
There are offerings on eBay like this

https://goo.gl/AmmFsV
CAUTION: 22759 INCLUDES slash numbers that
call out PTFE (Teflon) as opposed to ETFE
(Tefzel). Make sure your eBay seller knows
which insulation is on hand so you can get
the right one.

Finally, a google search on 22759 is going
to yield you a million+ hits . . .
Bob . . .


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ceengland7(at)gmail.com
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PostPosted: Fri Feb 02, 2018 7:07 am    Post subject: Shielded cable Reply with quote

Here you go:https://www.google.com/search?ei=VH50Ws_PO4z2swWIp4aoCA&q=fep+vs+etfe&oq=FEP+vs+ETFE+&gs_l=psy-ab.1.0.0i22i30k1.837.6597.0.14111.6.6.0.0.0.0.261.925.0j5j1.6.0....0...1c.1.64.psy-ab..0.6.924...0j0i7i30k1j0i7i10i30k1j0i7i5i30k1j0i5i30k1j0i8i30k1j0i30k1j35i39k1.0.lgKh6xCpZSk

On Fri, Feb 2, 2018 at 8:42 AM, Alec Myers <alec(at)alecmyers.com (alec(at)alecmyers.com)> wrote:
Quote:
--> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com (alec(at)alecmyers.com)>

Bob

I want the military grade. My supplier of choice is Allied Wire and Cable - but I don’t know which of their offerings to look at. When I want unshielded I go for 22759/16 but I don’t know what the shielded equivalent is.

Aircraft spruce sells M27500, but AWC lists several different kinds with different insulations, PTFE, FEP, ETFE:
http://www.awcwire.com/producttoc.aspx?id=m27500-cables

I think the choice is between RC-09 (FEP) and RC-06 (PTFE). Does it make any difference? Or should I use something else?

I just don’t want raised eyebrows and a sucking-in of breath over beer at the aircraft wiring club bar if I say what I used.




On Feb 2, 2018, at 9:33 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

At 07:14 AM 2/2/2018, you wrote:
> --> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com (alec(at)alecmyers.com)>
>
> Can anyone help:
>
> What’s the go-to equivalent milspec number to 22759/16 for avionics hookups, except shielded?

  'commercial' equivalents are going to be hard to
  find. if anyone goes to the effort to tool up
  for ETFE insulation, there's little value to
  be had for offering a less-than-military grade.

  Another procurement problem is price breaks for
  quantity. It doesn't take much total wire to
  wire up your airplane . . . perhaps a few hundred
  feet. But if you need multiple gages and perhaps
  find value in color coded wires, then you find
  yourself looking to procure lots of short lengths
  of multiple sizes and colors.

  From a sellers standpoint, it takes more
  labor to pick, pack, ship and sell a 10 foot
  chunk of 6AWG wire than it does for a 500' foot
  spool. The 500' spool is shipment ready . . .
  the short chunk has to be spooled of, measured,
  cut, packaged and perhaps marked . . . then the
  seller is 'stuck' with a 490' spool of wire that
  can no longer be sold as it's original, bulk
  price offering.

  Been there, done that, still have spools of wire
  on the shelf that I'm going to have to pass off
  to someone who wants to be in the short-chunks
  business.

  Our legacy short-chunks guys are B&C and SteinAir.
  There are offerings on eBay like this

https://goo.gl/AmmFsV


  CAUTION: 22759 INCLUDES slash numbers that
  call out PTFE (Teflon) as opposed to ETFE
  (Tefzel).  Make sure your eBay seller knows
  which insulation is on hand so you can get
  the right one.

  Finally, a google search on 22759 is going
  to yield you a million+ hits . . .


  Bob . . .



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PostPosted: Fri Feb 02, 2018 7:10 am    Post subject: Shielded cable Reply with quote

I read the descriptions…. I just want to know what everyone else uses Smile

On Feb 2, 2018, at 10:06 AM, Charlie England <ceengland7(at)gmail.com> wrote:

Here you go:
https://www.google.com/search?ei=VH50Ws_PO4z2swWIp4aoCA&q=fep+vs+etfe&oq=FEP+vs+ETFE+&gs_l=psy-ab.1.0.0i22i30k1.837.6597.0.14111.6.6.0.0.0.0.261.925.0j5j1.6.0....0...1c.1.64.psy-ab..0.6.924...0j0i7i30k1j0i7i10i30k1j0i7i5i30k1j0i5i30k1j0i8i30k1j0i30k1j35i39k1.0.lgKh6xCpZSk

On Fri, Feb 2, 2018 at 8:42 AM, Alec Myers <alec(at)alecmyers.com> wrote:


Bob

I want the military grade. My supplier of choice is Allied Wire and Cable - but I don’t know which of their offerings to look at. When I want unshielded I go for 22759/16 but I don’t know what the shielded equivalent is.

Aircraft spruce sells M27500, but AWC lists several different kinds with different insulations, PTFE, FEP, ETFE:
http://www.awcwire.com/producttoc.aspx?id=m27500-cables

I think the choice is between RC-09 (FEP) and RC-06 (PTFE). Does it make any difference? Or should I use something else?

I just don’t want raised eyebrows and a sucking-in of breath over beer at the aircraft wiring club bar if I say what I used.


On Feb 2, 2018, at 9:33 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:

At 07:14 AM 2/2/2018, you wrote:
Quote:


Can anyone help:

What’s the go-to equivalent milspec number to 22759/16 for avionics hookups, except shielded?

'commercial' equivalents are going to be hard to
find. if anyone goes to the effort to tool up
for ETFE insulation, there's little value to
be had for offering a less-than-military grade.

Another procurement problem is price breaks for
quantity. It doesn't take much total wire to
wire up your airplane . . . perhaps a few hundred
feet. But if you need multiple gages and perhaps
find value in color coded wires, then you find
yourself looking to procure lots of short lengths
of multiple sizes and colors.

From a sellers standpoint, it takes more
labor to pick, pack, ship and sell a 10 foot
chunk of 6AWG wire than it does for a 500' foot
spool. The 500' spool is shipment ready . . .
the short chunk has to be spooled of, measured,
cut, packaged and perhaps marked . . . then the
seller is 'stuck' with a 490' spool of wire that
can no longer be sold as it's original, bulk
price offering.

Been there, done that, still have spools of wire
on the shelf that I'm going to have to pass off
to someone who wants to be in the short-chunks
business.

Our legacy short-chunks guys are B&C and SteinAir.
There are offerings on eBay like this

https://goo.gl/AmmFsV
CAUTION: 22759 INCLUDES slash numbers that
call out PTFE (Teflon) as opposed to ETFE
(Tefzel). Make sure your eBay seller knows
which insulation is on hand so you can get
the right one.

Finally, a google search on 22759 is going
to yield you a million+ hits . . .
Bob . . .

====================================
-
Electric-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
====================================
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
====================================
WIKI -
errer" target="_blank">http://wiki.matronics.com
====================================
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
====================================


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stein(at)steinair.com
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PostPosted: Fri Feb 02, 2018 7:18 am    Post subject: Shielded cable Reply with quote

That IS the preferred wire for avionics hookups (single wires).....and the Shielded is 27500 TG or TE (difference being the thickness of the insulation on the inner conductors). "RC" wires are a not a recommended solution for a number of reasons....

Stick with what everyone uses and what the manufacturers recommend, don't try to re-invent the wheel here, you'll spend more time researching than it's worth for the hundreds of dollars you'll spend to wire up the entire plane. We go through millions of feet of this stuff per year, and there's a reason we stock what we do. Gimme a shout and we'll be happy to help you out.

Cheers,
Stein

--


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PostPosted: Fri Feb 02, 2018 10:29 am    Post subject: Shielded cable Reply with quote

At 08:42 AM 2/2/2018, you wrote:
Quote:
--> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com>

Bob

I want the military grade. My supplier of choice is Allied Wire and Cable - but I don’t know which of their offerings to look at. When I want unshielded I go for 22759/16 but I don’t know what the shielded equivalent is.

Aircraft spruce sells M27500, but AWC lists several different kinds with different insulations, PTFE, FEP, ETFE:
http://www.awcwire.com/producttoc.aspx?id=m27500-cables

I think the choice is between RC-09 (FEP) and RC-06 (PTFE). Does it make any difference? Or should I use something else?

I just don’t want raised eyebrows and a sucking-in of breath over beer at the aircraft wiring club bar if I say what I used.


It's nearly impossible to 'do it wrong' . . .

Keep in mind that over the last century of wiring
airplanes, wire insulation has evolved from cotton
covered rubber (with varnish paint) up though
nylon over PVC to finally evolve to Tefzel and
cousins. Every step-up in wire fabrication technology
has been eminently suitable for trickle-down into
older airframes . . . but there's nothing to
suggest that examples of older airframes have
become 'unsafe' due to their equally old
wiring. See https://goo.gl/iatVqJ

Use any shielded wire you can put your hands
on if it has enough strands and suitable gage.
Then I'd be pleased to buy you a beer . . .
and I promise not to blow suds all over you
when you tell me what you used.

You are 100x more likely to have a problem with
that wire due to poor installation than
choice of materials.

What kind of wire are you looking for and how
much? I think I've still got a big spool
of 3x22AWG Tefzel out in the shop. But a chunk of
Beldfoil over 3x22 PVC from your own junk box
is fine too.



Bob . . .


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