Comments on: Copper busbar: choose the right shape to reduce cost!

By: nimi9

nimi9 — Thu, 30 Jun 2011 01:05:38 +0000

Bus Bar Ampacity:
The NEC stipulates in the article on auxiliary gutters that a copper bus bar has a continuous ampacity of 1000 amps per square inch. Aluminum is 700 amps per square inch.
So to calculate the ampacity of any bus bar, envision a cross section of the bar. Length is not a factor in the calculation.
Multiply the two dimensions of the cross section as measured in inches. The product of these two numbers is the cross sectional area.
Next multiply the area times either 1000 amps/sq inch of copper of 700 amps/sq inch if aluminum.
This calculation is a straight square inches of the bus bar times 1000 amps/sq. inch if copper and square inches times 700 amps/sq. inch if aluminum.
So if you have a bus bar that is 1/2 inch by 3/4 inches (regardless of length) then it is .5 times .75 equals .375 times 1000 equals 375 amps if copper and .375 times 700 equals 262.5 amps if aluminum.=)

By: how to calculate amps ratting of busbar

how to calculate amps ratting of busbar — Mon, 27 Jun 2011 17:04:00 +0000

please give me information how to calculate the amps ratting of busbar if cross sectional area and length is known

By: tarkesh

tarkesh — Thu, 23 Jun 2011 05:53:48 +0000

thanks alot…..

By: Laurent

Laurent — Wed, 22 Jun 2011 15:46:30 +0000

as explained in the article, the increase of the perimeter of the bubar section is giving a better heat exchange, allowing to decrease the cross section for the same busbar ampacity (current capacity), thus saving costly material !

By: tarkesh

tarkesh — Wed, 22 Jun 2011 08:08:57 +0000

I have a doubt; pls explain your point in details. if crossectional area remains the same how come the current carrying capacity will be increased……..

By: Marin

Marin — Thu, 02 Dec 2010 12:10:07 +0000

There is copper-aluminium (bimetal) busbars, witch a better choise than any shape of copper busbars.

By: sudhir ain

sudhir ain — Fri, 01 Jan 2010 12:19:03 +0000

hollow Aluminium bus bar are being used for L T control panel in europe like tubular bus bars used in switchyards. Idea behind this is to reduce the weight of alum bus bar as the centre portion of bus bar is not used for current carrying and this extra weight is being elemintaed from cnetre .
is it true ? In india this concept has not come and panel builders continue to use conventional flat bus bar in L T panle fabrication . whats going on in france on this

By: Dan

Dan — Thu, 10 Dec 2009 16:06:41 +0000

I remind you that this blog is not for promotion, but to exchange experience, practices, news … about panel building profession. Read the “about this blog” page for more details

By: TEJAS DESAI

TEJAS DESAI — Tue, 01 Dec 2009 05:57:52 +0000

K/a: Purchase Manager
Dear Sir,
We are pleased to introduce ourselves as a leading reputed manufacturer