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Std density D sub pins.

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tim2542(at)sbcglobal.net
Guest

Posted: Sat Mar 22, 2014 6:11 am Post subject: Std density D sub pins.

Bob, what is the current rating on the Std density D sub pins? This is re: your avionics ground bus and the 18 gauge com wires going into it. I have the oversize pins that accept 18 awg, but I'm thinking the ~8 amps intermittent load needs to be divided over two pins.

Thanks

Tim

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Mar 22, 2014 8:39 am Post subject: Std density D sub pins.

At 09:10 AM 3/22/2014, you wrote:

 	  Quote: 	
		  



Bob, what is the current rating on the Std density D sub pins? This 

is re: your avionics ground bus and the 18 gauge com wires going 

into it. I have the oversize pins that accept 18 awg, but I'm 

thinking the ~8 amps intermittent load needs to be divided over two pins.

Thanks

Tim


	




   Splitting it onto 2 pins with 6", 22AWG

   ballast pigtails is never wrong . . .

   but the super-pin might be okay.



   What accessory are you talking about?

   Bob . . .

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tim2542(at)sbcglobal.net
Guest

Posted: Sat Mar 22, 2014 9:32 am Post subject: Std density D sub pins.

This is for a  GTN 650 GPS/NAV/COMM. All the grounds out of that box.

Tim





        From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>

 To: aeroelectric-list(at)matronics.com 

 Sent: Saturday, March 22, 2014 9:38 AM

 Subject: Re: Std density D sub pins.

  

 

 --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>



At 09:10 AM 3/22/2014, you wrote:

 	  Quote: 	
		   --> AeroElectric-List message posted by: Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)>

 

 Bob, what is the current rating on the Std density D sub pins? This is re: your avionics ground bus and the 18 gauge com wires going into it. I have the oversize pins that accept 18 awg, but I'm thinking the ~8 amps intermittent load needs to be divided over two pins.

 Thanks

 Tim


	




  Splitting it onto 2 pins with 6", 22AWG

  ballast pigtails is never wrong . . .

  but the super-pin might be okay.



  What accessory are you talking about?

  Bob . . .                           -Mat===============

 

 

  

 [quote][b]

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Bill Allen

Joined: 24 Aug 2009
Posts: 42
Location: UK

Posted: Sat Mar 22, 2014 9:51 am Post subject: Std density D sub pins.

Hi Guys,



Good question Tim <<what is the current rating on the Std density D sub pins? >>  I'm looking at something similar right now

 



Bob; I'm not sure I understand correctly what <<  with 6", 22AWG

   ballast pigtails  >> means? Can you clarify?

 

regards,



 

Bill Allen



 On 22 March 2014 17:31, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:

[quote] This is for a  GTN 650 GPS/NAV/COMM. All the grounds out of that box.

Tim





         From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>

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

 Sent: Saturday, March 22, 2014 9:38 AM

  Subject: Re: AeroElectric-List: Std density D sub pins.

  

 

 --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>



At 09:10 AM 3/22/2014, you wrote:

 > --> AeroElectric-List message posted by: Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)>

 	  Quote: 	
		   

 Bob, what is the current rating on the Std density D sub pins? This is re: your avionics ground bus and the 18 gauge com wires going into it. I have the oversize pins that accept 18 awg, but I'm thinking the ~8 amps intermittent load needs to be divided over two pins.

 > Thanks
	


 	  Quote: 	
		   Tim


	




  Splitting it onto 2 pins with 6", 22AWG

  ballast pigtails is never wrong . . .

  but the super-pin might be okay.



  What accessory are you talking about?

 

  Bob . . .                           -Mat===============

 

 

  

  	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




[b]

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donjohnston

Joined: 13 Dec 2009
Posts: 231

Posted: Sat Mar 22, 2014 11:17 am Post subject: Re: Std density D sub pins.

And what is a "super pin"?

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donjohnston

Joined: 13 Dec 2009
Posts: 231

Posted: Sat Mar 22, 2014 11:20 am Post subject: Re: Std density D sub pins.

And what is a "super pin"?

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Mar 22, 2014 1:33 pm Post subject: Std density D sub pins.

At 12:31 PM 3/22/2014, you wrote:

 	  Quote: 	
		  This is for a  GTN 650 GPS/NAV/COMM. All the grounds out of that box.

Tim


	




    Okay, I'm seeing grounds on P1001, 1004 and 1003

    that start out as multiple pins and splice down

    to single conductors of 18 or 20AWG depending on

    system voltage for a total of 7 wires.



    Without conversation with the folks who set it

    up, the rationale is not known to us. I've seen

    this 'pin doubling' on a variety of radios over

    the past 20 years.



    One thing you could do is run individual 20AWG

    wires from ALL 7 pins on the radio to independent

    pins in the ground bus. This would cover a host

    of rationals from quest for low impedance groung

    path (shaky), redundancy (a little less shaky)

    or load sharing in the pins (which is my best

    guess).



    I sold this philosophy onto the GQM163 super

    sonic sea skimmer about 10 years ago.



http://tinyurl.com/7h9h76r



    I think if it were my airplane, I'd go with

    7 separate wires in bundle to the ground bus.





   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Mar 22, 2014 1:37 pm Post subject: Std density D sub pins.

At 02:17 PM 3/22/2014, you wrote:

 	  Quote: 	
		  



And what is a "super pin"?


	


   Somebody, I think Garmin, spec'd a special

   pin for d-sub connectors that would accept

   larger than 20AWG wire. This is extra long

   such that the crimp happens outside the connector

   housing.



   I'm mystified by this product . . . in no way

   does it improve on the current rating of the

   individual pin, only the ability to attach

   wires rated for a lot more current than the

   pin . . . wouldn't use one myself.

   Bob . . .

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