Electrical Engineering - custom designed bus bars

Author

custom designed bus bars

hbrecke@cci-msc.com

2008-03-11, 3:25 am

Circuit Components Inc. is a leading design and manufacturer of custom
bus bars and power interconnections. CCI offers a personalized single
source for design, prototyping, low and high volume manufacturing for
both standard and custom projects. The number of layers, size and
thickness of conductors, type and thickness of dielectric material, as
well as method of termination depend on the electrical and physical
requirements of the specific application. Design options are virtually
limitless. CCI will work with customers to help design the best
product for your application.

Gerald Newton

2008-03-11, 8:25 pm

On Mar 10, 8:08=A0pm, hbre...@cci-msc.com wrote:
> Circuit Components Inc. is a leading design and manufacturer of custom
> bus bars and power interconnections. CCI offers a personalized single
> source for design, prototyping, low and high volume manufacturing for
> both standard and custom projects. The number of layers, size and
> thickness of conductors, type and thickness of dielectric material, as
> well as method of termination depend on the electrical and physical
> requirements of the specific application. Design options are virtually
> limitless. CCI will work with customers to help design the best
> product for your application.

I have made bus bars. It is quite common on remote jobs in Alaska
especially for temporary installations at mines and construction
camps.
We use one square inch of cross sectional area for copper at 1000
amperes and for aluminum at 700 amperes.
This is in the NEC for auxiliary gutters:

366.23 Ampacity of Conductors.
(A) Sheet Metal Auxiliary Gutters. Where the number of
current-carrying conductors contained in the sheet metal
auxiliary gutter is 30 or less, the correction factors specified
in 310.15(B)(2)(a) shall not apply. The current carried continuously
in bare copper bars in sheet metal auxiliary gutters
shall not exceed 1.55 amperes/mm squared (1000 amperes/in.squared)
of cross section of the conductor. For aluminum bars, the current
carried continuously shall not exceed 1.09 amperes/mm squared
(700 amperes/in.squared) of cross section of the conductor.

Bill Shymanski

2008-03-12, 3:25 am

Gerald Newton wrote:
> On Mar 10, 8:08 pm, hbre...@cci-msc.com wrote:

>
> I have made bus bars. It is quite common on remote jobs in Alaska
> especially for temporary installations at mines and construction
> camps.
> We use one square inch of cross sectional area for copper at 1000
> amperes and for aluminum at 700 amperes.
> This is in the NEC for auxiliary gutters:
>
> 366.23 Ampacity of Conductors.

The Copper Development Association Web site has some on-line calculators
for bus bars. That 1000 amps per square inch rule is something I've seen
a lot, but depending on the geometry you can get use higher density in
some configurations (especially in larger sizes).

Bill

phil-news-nospam@ipal.net

2008-03-12, 9:25 am

On Tue, 11 Mar 2008 21:33:27 -0500 Bill Shymanski <wtshyman@mts.net> wrote:
| Gerald Newton wrote:
|> On Mar 10, 8:08 pm, hbre...@cci-msc.com wrote:
|
|>
|> I have made bus bars. It is quite common on remote jobs in Alaska
|> especially for temporary installations at mines and construction
|> camps.
|> We use one square inch of cross sectional area for copper at 1000
|> amperes and for aluminum at 700 amperes.
|> This is in the NEC for auxiliary gutters:
|>
|> 366.23 Ampacity of Conductors.
|
| The Copper Development Association Web site has some on-line calculators
| for bus bars. That 1000 amps per square inch rule is something I've seen
| a lot, but depending on the geometry you can get use higher density in
| some configurations (especially in larger sizes).

Probably the worst case is a perfectly circular geometry as that would have
the smallest surface to remove heat. Flat bus bars should do better. They
do those, as you know. What geometry the 1000A/i^2 is for, I don't know.
I'll let someone else look that up. I hope I never need these for my home
even at 12 volts.

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / spamtrap-2008-03-12-0754@ipal.net |
|------------------------------------/-------------------------------------|

dirskyster@gmail.com

2008-03-13, 1:25 pm

On 3=D4=C211=C8=D5, =CF=C2=CE=E712=CA=B108=B7=D6, hbre...@cci-msc.com wrote:=

> Circuit Components Inc. is a leading design and manufacturer of custom
> bus bars and power interconnections. CCI offers a personalized single
> source for design, prototyping, low and high volume manufacturing for
> both standard and custom projects. The number of layers, size and
> thickness of conductors, type and thickness of dielectric material, as
> well as method of termination depend on the electrical and physical
> requirements of the specific application. Design options are virtually
> limitless. CCI will work with customers to help design the best
> product for your application.

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dirskyster@gmail.com

2008-03-15, 9:25 am

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