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Brass Current-carrying Calcs

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jluckey(at)pacbell.net
Guest

Posted: Wed Oct 30, 2019 11:17 am Post subject: Brass Current-carrying Calcs

I want to calculate the current-carrying capability of a piece of brass bussbar.

Once upon a time I had a chart that showed something like circular mil & resistance per foot for brass.

I've Googled for about 20 min but not able to find what I want.  (everything I'm finding is about copper & aluminum).

Any help is appreciated,

Thanks,

Jeff

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subknave

Joined: 17 Jun 2013
Posts: 17
Location: portsmouth, va

Posted: Wed Oct 30, 2019 11:47 am Post subject: Brass Current-carrying Calcs

Brass has 28% the capacity of copper but since the runs it will go through are so short and the amperage would be fairly low (<100 amps I am guessing) it is usually not a problem. The question is why not copper?



Rodney Hall

       

    	  Quote: 	
		   On October 30, 2019 at 3:03 PM Jeff Luckey <jluckey(at)pacbell.net> wrote:    

    

               I want to calculate the current-carrying capability of a piece of brass bussbar.     

           

     

           Once upon a time I had a chart that showed something like circular mil & resistance per foot for brass.     

           

     

           I've Googled for about 20 min but not able to find what I want.  (everything I'm finding is about copper & aluminum).     

           

     

           Any help is appreciated,     

           

     

           Thanks,     

           

     

           Jeff

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stinsonwagon(at)yahoo.com
Guest

Posted: Wed Oct 30, 2019 12:27 pm Post subject: Brass Current-carrying Calcs

I think this is the chart you are looking for 

see attached pdf

                  

                                                                    On Wednesday, October 30, 2019, 02:02:28 PM MDT, r.r.hall(at)cox.net r.r.hall(at)cox.net <r.r.hall(at)cox.net> wrote:                 

                 



                 



                 Brass has 28% the capacity of copper but since the runs it will go through are so short and the amperage would be fairly low (<100 amps I am guessing) it is usually not a problem. The question is why not copper?Rodney Hall           	  Quote: 	
		   On October 30, 2019 at 3:03 PM Jeff Luckey <jluckey(at)pacbell.net> wrote:                       I want to calculate the current-carrying capability of a piece of brass bussbar.     

                

           Once upon a time I had a chart that showed something like circular mil & resistance per foot for brass.     

                

           I've Googled for about 20 min but not able to find what I want.  (everything I'm finding is about copper & aluminum).     

                

           Any help is appreciated,     

                

           Thanks,     

                

           Jeff

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Oct 30, 2019 12:39 pm Post subject: Brass Current-carrying Calcs

At 02:45 PM 10/30/2019, you wrote:

  	  Quote: 	
		  Brass has 28% the capacity of copper but since the runs it will go through are so short and the amperage would be fairly low (<100 amps I am guessing) it is usually not a problem. The question is why not copper? 	


   Excellent question. Consider:



  https://tinyurl.com/y333wjru



  https://tinyurl.com/y3w7swc3



  https://tinyurl.com/y5uy46v8



   What size(s) are your proposed bus

   bar(s)?  I may have some pieces

   in my 'good scrap' that would suffice.



 

 

   Bob . . .

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jluckey(at)pacbell.net
Guest

Posted: Wed Oct 30, 2019 1:59 pm Post subject: Brass Current-carrying Calcs

Thanks Rod & Bob for your responses.

The short answer to the question of "why not use copper?" is that I've go a whole bunch of brass in my scrap-metal pile.

I did the math using the values for copper then adjusted for brass and the voltage drop at rated current is 37 mV, which I think I can live with 





Thanks for the input,

-Jeff

                  

                                                                    On Wednesday, October 30, 2019, 01:46:38 PM PDT, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:                 

                 



                 



                   At 02:45 PM 10/30/2019, you wrote:

  	  Quote: 	
		  Brass has 28% the capacity of copper but since the runs it will go through are so short and the amperage would be fairly low (<100 amps I am guessing) it is usually not a problem. The question is why not copper? 	


   Excellent question. Consider:



  https://tinyurl.com/y333wjru



  https://tinyurl.com/y3w7swc3



  https://tinyurl.com/y5uy46v8



   What size(s) are your proposed bus

   bar(s)?  I may have some pieces

   in my 'good scrap' that would suffice.



 

 

    Bob . . .

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