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Instrument Cluster Ground Wires

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cfi(at)conwaycorp.net
Guest

Posted: Mon May 14, 2007 9:41 am Post subject: Instrument Cluster Ground Wires

Perhaps  I’m over-thinking a very simple problem.   I have a modular instrument cluster from Mitchell Aircraft products.  Each modular instrument has its own  ground and return line, as well as wires for the lighting circuits.  The wires for each instrument are 20 AWG  and about a foot long, however, I need them to be longer to reach the  B&C tabbed ground block that will be mounted on the inside of the  firewall.  I see two options for  resolving this problem: 

<?xml:namespace prefix = o ns =  "urn:schemas-microsoft-com:office:office" />  

Option 1:  Solder or crimp all of the ground wires together as they are and then use a  larger wire to complete the necessary distance to the ground tab.  –Would it be advisable to even attempt  to bring as many as 10 wires together at one point? 

  

Option 2:  Extend the length of each 20 AWG wire so that each one can reach the ground tab  individually.  Again, the question  stands: Is it unreasonable to solder or crimp up to 10 ground  wires together at the end or should I plan to crimp a fast-on connector to each  individual wire?  If the latter,  than I will need to upgrade my 24 tab block to the 48 tab.  (Would seem like a lot of tabs for one  device, however.) 

  

Let me  know if you have another idea I should consider.  

  

Thanks in  advance for the input. 

 Michael H.

 

 

   [quote][b]

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steerr(at)bellsouth.net
Guest

Posted: Mon May 14, 2007 10:09 am Post subject: Instrument Cluster Ground Wires

If you have a metal airframe, why couldn't you ground them locally?



Bill

Michael Hinchcliff wrote:

 	  Quote: 	
		  

 Perhaps I’m over-thinking a very simple problem. I have a modular 

 instrument cluster from Mitchell Aircraft products. Each modular 

 instrument has its own ground and return line, as well as wires for 

 the lighting circuits. The wires for each instrument are 20 AWG and 

 about a foot long, however, I need them to be longer to reach the B&C 

 tabbed ground block that will be mounted on the inside of the 

 firewall. I see two options for resolving this problem:



 Option 1: Solder or crimp all of the ground wires together as they are 

 and then use a larger wire to complete the necessary distance to the 

 ground tab. –Would it be advisable to even attempt to bring as many as 

 10 wires together at one point?



 Option 2: Extend the length of each 20 AWG wire so that each one can 

 reach the ground tab individually. Again, the question stands: Is it 

 unreasonable to solder or crimp up to 10 ground wires together at the 

 end or should I plan to crimp a fast-on connector to each individual 

 wire? If the latter, than I will need to upgrade my 24 tab block to 

 the 48 tab. (Would seem like a lot of tabs for one device, however.)



 Let me know if you have another idea I should consider.

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frank.hinde(at)hp.com
Guest

Posted: Mon May 14, 2007 10:42 am Post subject: Instrument Cluster Ground Wires

I would extend them and ground them to the block...Its only  10 wires or so its not like its that many extra crimps... I would avoid  joining to a thick wire as it maybe difficult to get a good joint unless you  solder them all together.

  

 Frank



   From:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of  Michael Hinchcliff

Sent: Monday, May 14, 2007 10:40  AM

To: aeroelectric-list(at)matronics.com

Subject:  Instrument Cluster Ground Wires

 

  

Perhaps  I’m over-thinking a very simple problem.   I have a modular instrument cluster from Mitchell Aircraft products.  Each modular instrument has its own  ground and return line, as well as wires for the lighting circuits.  The wires for each instrument are 20 AWG  and about a foot long, however, I need them to be longer to reach the  B&C tabbed ground block that will be mounted on the inside of the  firewall.  I see two options for  resolving this problem: 

  

Option 1:  Solder or crimp all of the ground wires together as they are and then use a  larger wire to complete the necessary distance to the ground tab.  –Would it be advisable to even attempt  to bring as many as 10 wires together at one point? 

  

Option 2:  Extend the length of each 20 AWG wire so that each one can reach the ground tab  individually.  Again, the question  stands: Is it unreasonable to solder or crimp up to 10 ground  wires together at the end or should I plan to crimp a fast-on connector to each  individual wire?  If the latter,  than I will need to upgrade my 24 tab block to the 48 tab.  (Would seem like a lot of tabs for one  device, however.) 

  

Let me  know if you have another idea I should consider.  

  

Thanks in  advance for the input. 

 Michael H.

 

 

[quote]



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[b]

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Peter H

Joined: 20 Mar 2007
Posts: 197

Posted: Mon May 14, 2007 1:28 pm Post subject: Instrument Cluster Ground Wires

I made two ground collectors from alum angle then ran a single ground from each to the block.  

Peter H  

         

  

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Hinde, Frank George (Corvallis)

 Sent: Tuesday, 15 May 2007 4:39 AM

 To: aeroelectric-list(at)matronics.com

 Subject: RE: AeroElectric-List: Instrument Cluster Ground Wires  

  

   

I would extend them and ground them to the block...Its only 10 wires or so its not like its that many extra crimps... I would avoid joining to a thick wire as it maybe difficult to get a good joint unless you solder them all together.  

   

Frank  

       

  

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Michael Hinchcliff

 Sent: Monday, May 14, 2007 10:40 AM

 To: aeroelectric-list(at)matronics.com

 Subject: AeroElectric-List: Instrument Cluster Ground Wires    

Perhaps I’m over-thinking a very simple problem.  I have a modular instrument cluster from Mitchell Aircraft products.  Each modular instrument has its own ground and return line, as well as wires for the lighting circuits.  The wires for each instrument are 20 AWG and about a foot long, however, I need them to be longer to reach the B&C tabbed ground block that will be mounted on the inside of the firewall.  I see two options for resolving this problem:  

   

Option 1: Solder or crimp all of the ground wires together as they are and then use a larger wire to complete the necessary distance to the ground tab.  –Would it be advisable to even attempt to bring as many as 10 wires together at one point?  

   

Option 2: Extend the length of each 20 AWG wire so that each one can reach the ground tab individually.  Again, the question stands: Is it unreasonable to solder or crimp up to 10 ground wires together at the end or should I plan to crimp a fast-on connector to each individual wire?  If the latter, than I will need to upgrade my 24 tab block to the 48 tab.  (Would seem like a lot of tabs for one device, however.)  

   

Let me know if you have another idea I should consider.   

   

Thanks in advance for the input.   

    

Michael H.  

    



    

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nuckollsr(at)cox.net
Guest

Posted: Mon May 14, 2007 2:35 pm Post subject: Instrument Cluster Ground Wires

At 12:39 PM 5/14/2007 -0500, you wrote:



 	  Quote: 	
		  Perhaps I’m over-thinking a very simple problem.  I have a modular 

instrument cluster from Mitchell Aircraft products.  Each modular 

instrument has its own ground and return line, as well as wires for the 

lighting circuits.  The wires for each instrument are 20 AWG and about a 

foot long, however, I need them to be longer to reach the B&C tabbed 

ground block that will be mounted on the inside of the firewall.  I see 

two options for resolving this problem:



<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />



Option 1: Solder or crimp all of the ground wires together as they are and 

then use a larger wire to complete the necessary distance to the ground 

tab.  –Would it be advisable to even attempt to bring as many as 10 wires 

together at one point?



Option 2: Extend the length of each 20 AWG wire so that each one can reach 

the ground tab individually.  Again, the question stands: Is it 

unreasonable to solder or crimp up to 10 ground wires together at the end 

or should I plan to crimp a fast-on connector to each individual wire?  If 

the latter, than I will need to upgrade my 24 tab block to the 48 

tab.  (Would seem like a lot of tabs for one device, however.)



Let me know if you have another idea I should consider.


	


  See



http://www.aeroelectric.com/Pictures/Grounding/Minibus1.jpg



http://www.aeroelectric.com/Pictures/Grounding/Minibus2.jpg



http://www.aeroelectric.com/Pictures/Grounding/AVG_RA.jpg



http://www.aeroelectric.com/Pictures/Grounding/AGB_V.jpg



http://www.aeroelectric.com/Pictures/Grounding/Avionics_Bus_3.jpg



        Bob . . .



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

        ( "Physics is like sex: sure, it may   )

        ( give some practical results, but     )

        ( that's not why we do it."            )

        (                                      )

        (                 Richard P. Feynman   )

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

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cfi(at)conwaycorp.net
Guest

Posted: Mon May 14, 2007 4:31 pm Post subject: Instrument Cluster Ground Wires

Good approach.  Thanks, Bob.



Do not archive.



---

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