Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

wiring question

Matronics Email Lists Forum Index -> RV-List

View previous topic :: View next topic

Author Message

bertrv6(at)gmail.com
Guest

Posted: Sun Mar 01, 2009 2:05 pm Post subject: wiring question

Hi:



In checking my wiring, now that I am istalling the second radio, I

found that a couple of the real small wires,  of the trim tab, I think

they

are 24/26 if I remember corectly, are almost completely broken...that

is why I had problem with the triming...the only thing I can think of

is

when one, remove the tie wraps, I think because the small size, the

cutting pliers, nick the wires...



The question is , I have to now splice, these two wires, add a longer

piece, etc..what is the best thing to do this delicate task..

solder a piece,,can I use a little larger gauge?  I guess the answer

is not...then to crimp these rascals,, I need all the suggestions

from all  experts....how I am going to strip this things...and all

that, under the inst. panel.



Your comments and suggestions will be appreciated.

Bert



rv6a



do not archive

ceengland(at)bellsouth.ne
Guest

Posted: Sun Mar 01, 2009 2:35 pm Post subject: wiring question

bert murillo wrote:

 	  Quote: 	
		   



 Hi:



 In checking my wiring, now that I am istalling the second radio, I

 found that a couple of the real small wires,  of the trim tab, I think

 they

 are 24/26 if I remember corectly, are almost completely broken...that

 is why I had problem with the triming...the only thing I can think of

 is

 when one, remove the tie wraps, I think because the small size, the

 cutting pliers, nick the wires...



 The question is , I have to now splice, these two wires, add a longer

 piece, etc..what is the best thing to do this delicate task..

 solder a piece,,can I use a little larger gauge?  I guess the answer

 is not...then to crimp these rascals,, I need all the suggestions

 from all  experts....how I am going to strip this things...and all

 that, under the inst. panel.



 Your comments and suggestions will be appreciated.

 Bert



 rv6a


	


Hi Bert,



If the wires are behind the instrument panel & won't be required to flex 

in use, you can splice in a size that's as large or larger & it will be 

fine. Either solder or crimp will work fine, as long as the wires are 

supported on both sides of the splice so they don't try to flex the 

joint. Stripping is just 'technique'. Find some small gauge scrap & 

practice with your strippers. If your strippers don't strip wire that 

small, practice with a sharp knife, cutting part way through the 

insulation all the way around & then flexing the wire at the cut & 

pulling on the insulation to remove it.



Charlie

pitts_pilot(at)bellsouth.
Guest

Posted: Sun Mar 01, 2009 2:43 pm Post subject: wiring question

bert murillo wrote:

 	  Quote: 	
		   



 Hi:



 In checking my wiring, now that I am istalling the second radio, I

 found that a couple of the real small wires,  of the trim tab, I think

 they

 are 24/26 if I remember corectly, are almost completely broken...that

 is why I had problem with the triming...

You didn't say what the problem is ..... could have been helpful.
	


 	  Quote: 	
		   the only thing I can think of

 is

 when one, remove the tie wraps, I think because the small size, the

 cutting pliers, nick the wires...

   

stripping insulation with side-cutters (also known as 'dykes' for some 
	


reason) is for people who have been doing it a long time.

 	  Quote: 	
		   The question is , I have to now splice, these two wires, add a longer

 piece, etc..what is the best thing to do this delicate task..

 solder a piece,,can I use a little larger gauge?

Well, depends on what they connect to, of course.  (more missing info)  
	


There is no harm in using heavier gauge wire unless it won't fit in the 

receptacle whatever it is.

 	  Quote: 	
		     I guess the answer is not...then to crimp these rascals

If they're going to crimp on connectors then crimping is OK on larger 
	


gauge wire.

 	  Quote: 	
		   ,, I need all the suggestions

 from all  experts....how I am going to strip this things...and all

 that, under the inst. panel.

   

The top of the list is buy a good wire stripper.  Failing that you can 
	


use a razor blade on the small insulation.  Lay the wire on a flat 

surface and very lightly press a single edge razor blade on the 

insulation while you roll the wire.  Do not 'saw' with the razor blade.  

Think of it more like scoring the insulation than cutting it.  Then you 

can use a pair of needle-nosed pliers to pull the insulation off.

 	  Quote: 	
		   Your comments and suggestions will be appreciated.

   

If I missed the mark here, send me some more data.
	


Linn

do not archive

 	  Quote: 	
		  

 Bert



 rv6a



 do not archive



   

 ------------------------------------------------------------------------

 Checked by AVG - www.avg.com

pitts_pilot(at)bellsouth.
Guest

Posted: Sun Mar 01, 2009 2:51 pm Post subject: wiring question

Excellent advice also Charlie.  Especially the flexing part.  This works 

with almost 99% of the insulation, thick or thin.

One other 'wiring' trick I use ..... if you have really slick insulation 

.... tefzel or even teflon ..... once you get the insulation cut, slip 

a rubber cover from a large alligator clip over the stripped end (use 

the small hole end) grip and pull.  I have no idea why this works, but 

it seems to!

Linn

do not archive

Charlie England wrote:

 	  Quote: 	
		   



 bert murillo wrote:

> 

>

> Hi:

>

> In checking my wiring, now that I am istalling the second radio, I

> found that a couple of the real small wires,  of the trim tab, I think

> they

> are 24/26 if I remember corectly, are almost completely broken...that

> is why I had problem with the triming...the only thing I can think of

> is

> when one, remove the tie wraps, I think because the small size, the

> cutting pliers, nick the wires...

>

> The question is , I have to now splice, these two wires, add a longer

> piece, etc..what is the best thing to do this delicate task..

> solder a piece,,can I use a little larger gauge?  I guess the answer

> is not...then to crimp these rascals,, I need all the suggestions

> from all  experts....how I am going to strip this things...and all

> that, under the inst. panel.

>

> Your comments and suggestions will be appreciated.

> Bert

>

> rv6a



 Hi Bert,



 If the wires are behind the instrument panel & won't be required to 

 flex in use, you can splice in a size that's as large or larger & it 

 will be fine. Either solder or crimp will work fine, as long as the 

 wires are supported on both sides of the splice so they don't try to 

 flex the joint. Stripping is just 'technique'. Find some small gauge 

 scrap & practice with your strippers. If your strippers don't strip 

 wire that small, practice with a sharp knife, cutting part way through 

 the insulation all the way around & then flexing the wire at the cut & 

 pulling on the insulation to remove it.



 Charlie



 ------------------------------------------------------------------------

 Checked by AVG - www.avg.com

rv8a2001(at)yahoo.com
Guest

Posted: Sun Mar 01, 2009 2:56 pm Post subject: wiring question

In the aviation world 22g is the minimum....although there is a new wire available that is stronger, 1 gage smaller (24), and carries the same amperage.



After soldering 26~28 gage wires you just touch them they break. We have a connector at work with 28g and soldered! We tried to rework it and the wires broke off about the 3rd time they were moved, it was scrapped. I can get you all the mil spec numbers if it will help and the part number of the new wire if you want it. Although the new wire must have silver in the solder. Oh and in the aviation defense contractor industry, crimping is the way to go.



Scott

RV-8a

--- On Sun, 3/1/09, bert murillo <bertrv6(at)gmail.com> wrote:



 	  Quote: 	
		   From: bert murillo <bertrv6(at)gmail.com>

 Subject: wiring question

 To: rv-list(at)matronics.com

 Date: Sunday, March 1, 2009, 2:00 PM

 

 <bertrv6(at)gmail.com>

 

 Hi:

 

 In checking my wiring, now that I am istalling the second

 radio, I

 found that a couple of the real small wires,  of the trim

 tab, I think

 they

 are 24/26 if I remember corectly, are almost completely

 broken...that

 is why I had problem with the triming...the only thing I

 can think of

 is

 when one, remove the tie wraps, I think because the small

 size, the

 cutting pliers, nick the wires...

 

 The question is , I have to now splice, these two wires,

 add a longer

 piece, etc..what is the best thing to do this delicate

 task..

 solder a piece,,can I use a little larger gauge?  I guess

 the answer

 is not...then to crimp these rascals,, I need all the

 suggestions

 from all  experts....how I am going to strip this

 things...and all

 that, under the inst. panel.

 

 Your comments and suggestions will be appreciated.

 

 

 Bert

 

 rv6a

 

 do not archive

Vanremog(at)aol.com
Guest

Posted: Sun Mar 01, 2009 5:09 pm Post subject: wiring question

Scott-

  

 All you have stated is correct, particularly with regard to the reliability  of crimping vs soldering on all wires, but there is also a  significant difference between 7 strand and 19 strand layup when  it comes to needing to use lots of fine wires.  This usually only  happens when running lots of I/Os inside avionics boxes but 19 strand is far  more resistant to breakage than is 7 strand and should be encouraged when using  24AWG wires and smaller.

  

  N1GV (RV-6A, Flying 912hrs, O-360-A1A, C/S, Silicon  Valley)



  

  In a message dated 3/1/2009 2:57:08 P.M. Pacific Standard Time,  rv8a2001(at)yahoo.com writes:

  	  Quote: 	
		  After    soldering 26~28 gage wires you just touch them they break. We have a connector    at work with 28g and soldered! We tried to rework it and the wires broke off    about the 3rd time they were moved, it was scrapped. I can get you all the mil    spec numbers if it will help and the part number of the new wire if you want    it. Although the new wire must have silver in the solder. Oh and in the    aviation defense contractor industry, crimping is the way to go.     

    

	


 Get a jump start on your taxes. Find a tax professional in your neighborhood today.

  [quote][b]

Sully

Joined: 08 Jan 2008
Posts: 9
Location: Euless, TX

Posted: Sun Mar 01, 2009 7:15 pm Post subject: Re: wiring question

Bert,

Strip the ends long and fold them back double and then crimp D sub machined pins and sockets with a good quality indent crimper then cover with heat shrink

_________________
Sully
RV-7 In-work

Vanremog(at)aol.com
Guest

Posted: Sun Mar 01, 2009 9:48 pm Post subject: wiring question

Everything you wanted to know about mmil-spec contacts and were afraid to  ask.

  

 Find someone with a M22520/2-01 Blue colored Daniels Crimper for  MIL-C-39029 contacts.  The correct positioner is helpful but not  essential.  The SubD connectors are covered under MIL-C-24308 and  use a particular M39029 slash sheet and BIN contact that can be located by  going to the Daniels website http://www.dmctools.com/store/browser.asp

  

  N1GV (RV-6A, Flying 912hrs, O-360-A1A, C/S, Silicon  Valley)

 

  

  In a message dated 3/1/2009 7:18:39 P.M. Pacific Standard Time,  mr.sully(at)tx.rr.com writes:

  	  Quote: 	
		  Strip    the ends long and fold them back double and then crimp D sub machined pins and    sockets with a good quality indent crimper then cover with heat shrink     

    

	


 Need a job? Find employment help in your area.

  [quote][b]

rv8a2001(at)yahoo.com
Guest

Posted: Mon Mar 02, 2009 6:35 am Post subject: wiring question

Just an FYI



The wire the aircraft defense industry uses is M22759-44-gage-color or M22759-32-gage-color with the -44 being the better of the two. The solder used with this wire needs to be 1.5% silver I beleive, such as Kester 48. This wire is much stronger than standard wire of the same gage and can carry more amperage. We are switching over to this wire now at work and can save a fair amount of weight per aircraft.



Scott

RV-8a



--- On Sun, 3/1/09, Vanremog(at)aol.com <Vanremog(at)aol.com> wrote:



 	  Quote: 	
		   From: Vanremog(at)aol.com <Vanremog(at)aol.com>

 Subject: Re: wiring question

 To: rv-list(at)matronics.com

 Date: Sunday, March 1, 2009, 5:00 PM

 Scott-

  

 All you have stated is correct, particularly with regard to

 the reliability  

 of crimping vs soldering on all wires, but there is also a 

 significant 

 difference between 7 strand and 19 strand layup when  it

 comes to needing to use 

 lots of fine wires.  This usually only  happens when

 running lots of I/Os inside 

 avionics boxes but 19 strand is far  more resistant to

 breakage than is 7 

 strand and should be encouraged when using  24AWG wires and

 smaller.

  

  

 N1GV (RV-6A, Flying 912hrs, O-360-A1A, C/S, Silicon 

 Valley)

 

  

  

 In a message dated 3/1/2009 2:57:08 P.M. Pacific Standard

 Time,  

 rv8a2001(at)yahoo.com writes:

 

 After  soldering 26~28 gage wires you just touch them they

 break. We have a 

 connector  at work with 28g and soldered! We tried to

 rework it and the wires 

 broke off  about the 3rd time they were moved, it was

 scrapped. I can get you 

 all the mil  spec numbers if it will help and the part

 number of the new wire 

 if you want  it. Although the new wire must have silver in

 the solder. Oh and 

 in the  aviation defense contractor industry, crimping is

 the way to go.  

 

 

 

 

 **************Get a jump start on your taxes. Find a tax

 professional in your 

 neighborhood today. 

 (http://yellowpages.aol.com/search?query=Tax+Return+Preparation+%26+Filing&ncid=emlcntusyelp00000004)

john_s_bright(at)yahoo.co
Guest

Posted: Mon Mar 02, 2009 1:14 pm Post subject: wiring question

This is from AS22759 which may be the latest designation of this specification but it has no advice on selection:



SAE-AS22759/32, WIRE, ELECTRICAL, FLUOROPOLYMER-INSULATED,

CROSSLINKED MODIFIED ETFE, LIGHTWEIGHT, TIN-COATED COPPER, 150 °C,

600-VOLT.



SAE-AS22759/44, WIRE, ELECTRICAL, FLUOROPOLYMER-INSULATED,

CROSSLINKED MODIFIED ETFE, LIGHTWEIGHT, SILVER-COATED COPPER,

200 °C, 600-VOLT.



I looked up the melting pints of tin and silver... 232 and 962 C respectively.



There are designators from AS22759/1 to AS22795/92.



I haven't done looked but I imagine AeroElectric Connection has advice.

 

Thanks,



John  Bright

o:757-864-2305

h:757-874-0861

c:757-812-1909

http://www.facebook.com/people/John_Bright/1450601073

From: scott bilinski <rv8a2001(at)yahoo.com>

To: rv-list(at)matronics.com

Sent: Monday, March 2, 2009 9:31:19 AM

Subject: Re: wiring question



 --> RV-List message posted by: scott bilinski <rv8a2001(at)yahoo.com (rv8a2001(at)yahoo.com)>

Just an FYI



The wire the aircraft defense industry uses is M22759-44-gage-color or M22759-32-gage-color with the -44 being the better of the two. The solder used with this wire needs to be 1.5% silver I beleive, such as Kester 48. This wire is much stronger than standard wire of the same gage and can carry more amperage. We are switching over to this wire now at work and can save a fair amount of weight per aircraft.



Scott

RV-8a



--- On Sun, 3/1/09, Vanremog(at)aol.com (Vanremog(at)aol.com) <Vanremog(at)aol.com (Vanremog(at)aol.com)> wrote:



 	  Quote: 	
		   From: Vanremog(at)aol.com (Vanremog(at)aol.com) <Vanremog(at)aol.com (Vanremog(at)aol.com)>

 Subject: Re: wiring question

 To: rv-list(at)matronics.com (rv-list(at)matronics.com)

 Date: Sunday, March 1, 2009, 5:00 PM

 Scott-

  

 All you have stated is correct, particularly with regard to

 the reliability  

 of crimping vs soldering on all wires, but there is also a 

 significant 

 difference between 7 strand and 19 strand layup when  it

 comes to needing to use 

 lots of fine wires.  This usually only  happens when

 running lots of I/Os inside 

 avionics boxes but 19 strand is far  more resistant to

 breakage than is 7 

 strand and should be encouraged when using  24AWG wires and

 smaller.

  

  

 N1GV (RV-6A,  Flying 912hrs, O-360-A1A, C/S, Silicon 

 Valley)

 

  

  

 In a message dated 3/1/2009 2:57:08 P.M. Pacific Standard

 Time,  

 rv8a2001(at)yahoo.com (rv8a2001(at)yahoo.com) writes:

 

 After  soldering 26~28 gage wires you just touch them they

 break. We have a 

 connector  at work with 28g and soldered! We tried to

 rework it and the wires 

 broke off  about the 3rd time they were moved, it was

 scrapped. I can get you 

 all the mil  spec numbers if it will help and the part

 number of the new wire 

 if you want  it. Although the new wire must have silver in

 the solder. Oh and 

 in the  aviation defense contractor industry, crimping is

 the way to go.  

 

 

 

 

 **************Get a  jump start on your taxes. Find a tax

 professional in your 

 neighborhood today. 

 (http://yellowpages.aol.com/search?query=Tax+Return+Preparation+%26+Filing&ncid=emlcntusyelp00000004)


	




  bsp;  --> ht                    &nbsphref="http://www.matronics.com/contribution" target="_blank">http://www=======================

         [quote][b]

Display posts from previous:

	Matronics Email Lists Forum Index -> RV-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum