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6 AWG vs Copper Bar

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hammer408(at)comcast.net
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Posted: Fri May 16, 2008 12:35 pm Post subject: 6 AWG vs Copper Bar

Bob:



Insteard of using 6 AWG from starter contctor to Current Limiter, I want to

use .063 copper bar...is that adequate or should I use .125.



thanks

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nuckolls.bob(at)cox.net
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Posted: Fri May 16, 2008 6:31 pm Post subject: 6 AWG vs Copper Bar

At 04:37 PM 5/16/2008 -0700, you wrote:



 	  Quote: 	
		  

<hammer408(at)comcast.net>



Bob:



Insteard of using 6 AWG from starter contctor to Current Limiter, I want to

use .063 copper bar...is that adequate or should I use .125.



thanks


	


  .063 x .75" copper is fine.



   Bob . . .

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hammer408(at)comcast.net
Guest

Posted: Sun May 18, 2008 6:51 am Post subject: 6 AWG vs Copper Bar

Bob:



I have .063 X .50";  can I double up and make 2 bars thus giving me .125 x

.50"



Thanks

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nuckolls.bob(at)cox.net
Guest

Posted: Sun May 18, 2008 10:20 am Post subject: 6 AWG vs Copper Bar

At 10:56 AM 5/18/2008 -0700, you wrote:



 	  Quote: 	
		  

<hammer408(at)comcast.net>



Bob:



I have .063 X .50";  can I double up and make 2 bars thus giving me .125 x

.50"


	


   Sure . . . but the .50" width doesn't leave you much edge

   margin at the clearance holes for 5/16" studs and there's some

   concern for spreading the high currents across the hole

   through 3/32" connections at the edges. But lots of folk

   have used this width of material and I've not heard of

   any problems. In fact, a single layer offers a cross-

   section of .063 x .50 = .031 square inches. 4AWG

   wire is two, 3AWG-doubling steps larger than 10AWG.

   10 AWG is .1" diameter or 3.14 x .05^2 = 0.0078

   square inches.  Taken times 4 yields .031 square

   inches for 4AWG wire. The same as your proposed

   straps which will cool better because of larger

   surface area and heat-sinks at the studs.



   So electrically and thermally, the proposed strips

   are fine. How about this? Go to your local well-stocked

   hardware store and get some 5/16" brass washers.

   Solder to one side of your 0.5" copper strap at the

   5/16" hole locations. I think you said you were

   working with a shunt at the other end which is a

   1/4" stud. No "reinforcement" necessary.



   "Doubling up" the strap makes it more difficult

   to get the two pieces to lay together. A soldered

   on doubler at the 5/16" holes is easier and will

   look better when you're finished.



   Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

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

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hammer408(at)comcast.net
Guest

Posted: Sun May 18, 2008 10:35 am Post subject: 6 AWG vs Copper Bar

Thanks Bob:  I like the idea of soldering brass washers.....or better yet, I

may just order .063 x .75" wide copper bar and KISS.





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