Electrical Engineering - Resistivity of conductor

Author

Resistivity of conductor

premji40

2008-03-13, 9:25 am

What is the resistivity of Copper and Aluminium Conductor at ambient
temprature and 100 deg 'C' temprature in calculation of Electromagnet

Porky Taylor

2008-03-13, 9:25 am

"Anal Fister" <paramjit48@gmail.com> wrote in message
news:0becaae9-963d-4912-b0d4-2f9e95dfc032@e23g2000prf.googlegroups.com...
> What is the resistivity of Copper and Aluminium Conductor at ambient
> temprature and 100 deg 'C' temprature in calculation of Electromagnet

27.234 & 34.11123 my son.

Porky Taylor
"The guy in the rubber sausage suit"

dirskyster@gmail.com

2008-03-13, 1:25 pm

On 3=D4=C213=C8=D5, =CF=C2=CE=E76=CA=B142=B7=D6, premji40 <paramji...@gmail.=
com> wrote:
> What is the resistivity of Copper and Aluminium Conductor at ambient
> temprature and 100 deg 'C' temprature in calculation of Electromagnet

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Gerald Newton

2008-03-13, 8:25 pm

On Mar 13, 2:42=A0am, premji40 <paramji...@gmail.com> wrote:
> What is the resistivity of Copper and Aluminium Conductor at ambient
> temprature and 100 deg 'C' temprature in calculation of Electromagnet

Give a man a fish and he eats for a day. Show him how to fish and he
can feed himself for life.

Copper has a resistivity of 10.371 ohms at 20 degrees C. The inferred
resistance is zero ohms at -234.5 degrees C. Now apply the point
slope formula to find the equation between the two points and you can
find the resistance at any temperature.
For Aluminum the resistivity is 17.002 ohms at 20 degrees C and the
inferred resistance is zero at -228.1 degrees C.
Resistivity is the resistance of material one foot long and 0.001 inch
in diameter or one circular mil in cross sectional area (diameter in
thousands of an inch squared)
Resistance is inversely proportional to circular mil area. Divide
resistivity by CMA to find resistance of larger conductors.
Reference: Neher McGrath paper where RDC is discussed. N-G also uses
a lay factor 1.02.

Link: http://www.electriciancalculators.com/ampacity/nm1.pdf

Salmon Egg

2008-03-14, 3:25 am

In article
<e12c7ce2-a4c0-4dfc-b22d-681fbe86a413@i12g2000prf.googlegroups.com>,
Gerald Newton <electrician@electrician2.com> wrote:

> Give a man a fish and he eats for a day. Show him how to fish and he
> can feed himself for life.

Whoever said that never tried to teach a real person how to fish or
learned from a real person. Sure,when fish are plentiful, like when a
fish hatchery mistakenly realized their stock of fish, it is easy. When
fishing is tough, the good fishermen were the ones born that way. They
were not made by fishing schools.

So do not teach. Do not give any fish.

Bill

Rheilly Phoull

2008-03-14, 9:25 am

"Salmon Egg" <SalmonEgg@sbcglobal.net> wrote in message
news:SalmonEgg-026632.20313813032008@news.la.sbcglobal.net...
> In article
> <e12c7ce2-a4c0-4dfc-b22d-681fbe86a413@i12g2000prf.googlegroups.com>,
> Gerald Newton <electrician@electrician2.com> wrote:
>
>
> Whoever said that never tried to teach a real person how to fish or
> learned from a real person. Sure,when fish are plentiful, like when a
> fish hatchery mistakenly realized their stock of fish, it is easy. When
> fishing is tough, the good fishermen were the ones born that way. They
> were not made by fishing schools.
>
> So do not teach. Do not give any fish.
>
> Bill

Then there was the one "Show a man how to make fire and he can keep warm if
there is fuel, set him alight and he will be warm for the rest of his life"
I forget who coined this one.
--
Cheers ............. Rheilly

dirskyster@gmail.com

2008-03-15, 9:25 am

dirskyster@gmail.com

2008-03-16, 1:25 pm

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