88 / E-1, Block E Model Town, Lahore, Punjab, Pakistan
   Mon-Sat 09:00 AM - 05:00 PM
   88 / E-1, Block E Model Town, Lahore, Punjab, Pakistan
   Mon-Sat 09:00 AM - 05:00 PM

Copper Material in Cables


Every Material Offers Some Resistance or Opposition to The flow Electric Current Through it, Good Conductors such as Copper and Aluminum Offer Very Little Resistance. Poor Conductors or Insulator Such as Glass, Wood and Paper Offer a High Resistance to Current Flow.
The Size and type of Materials of the Wire in an Electric Circuit are chosen to keep the electrical resistance as low as possible. In this Way, Current can flow easily through the conductors.
Temperature also affects the resistance of electrical conductors to some extent. In most conductors the resistance increases with temperature. The relative resistance of several conductors of the same length and cross section metals are arranged in order of ascending resistance.


COPPER  108
   
GOLD  140
   
ALUMINUM 180
   
PLATINIUM 700
   
LEAD 1350

CONDUCTOR

Conductor of a cable or core. The conducting portion, consisting of a Single wire or of a group of wires Assembled together and in contact with each other or connected in Parallel.

CONDUCTOR MATERIALS AS PER B.S & I.E.C
As per B.S 6360 : 1991
The Conductor shall consist of one of the following:

Plain or Metal-Coated Annealed Copper
Plain or Metal-Coated Hard-Drawn Copper
Plain Aluminum

As per I.E.C 228 :1987
The Conductor may consist of:

Plain or Metal-Coated Annealed Copper;
or Plain or Metal-Coated Aluminum or Aluminum Alloy;
or Metal-Clad Aluminum;
or Metal-Coated Metal-Clad Aluminum.

NOTE
For Cables the Copper material shall consist of well Annealed Electrolytic Copper wires. The wires shall be free from oxide flakes and other defects.

Some Mechanical and Electrical Characteristics of Copper and Aluminum Materials are Given Below:


CHARACTERISTICS OF CONDUCTOR MATERIALS

Characteristics

Unit

Annealed
Copper

Hard-drawn
Copper

Aluminium

Conductivity

%

99.99

97

61

Volume Resistivity
at 20°C

Ohm-mm3 / Mtr.

0.017241

0.017771

0.028264

Maximum

 

 

 

Density at 20°C

gram / cm3

8.89

8.89

2.703

Mass resistivity at 20°C

Ohm-gram / Mtr.

0.15328

0.15741

0.076398

Resistance at 20°C

Ohm-mm2 / km..

17.241

17.771

28.264

Temperature Coefficient
of Resistance

Per Degree

0.0393

0.0384

0.0403

Ultimate Level stress
(Approximate)

Kg./mm2

25.3

42.2

16.5



THE CHEMICAL COMPOSITION OF COPPER CATHODE PLATE
(RAW MATERIAL OF HARD-DRAWN COPPER ROD)


PRODUCT: COPPER CATHODE PLATES.
SPECIFICATION: TO LME STANDARD
GRADE 99.99% PURITY ( TOLERANCE OF 0.03% )

CHEMICAL COMPOSITION

 

1

Copper,

as

Cu

99.99%

2

Cobalt,

as

Co

0.2 ppm

3

Lead,

as

Pb

0.2 ppm

4

Iron,

as

Fe

2.0 ppm

5

Aluminum

as

Al

0.5 ppm

6

Manganese

as

Mn

0.1 ppm

7

Nickel,

as

Ni

0.2 ppm

8

Antimony

as

Sb

0.1 ppm

9

Arsenic,

as

As

0.1 ppm

10

Silica,

as

Si

0.3 ppm

11

Bismuth,

as

Bi

0.1 ppm

12

Tellurium,

as

Te

0.1 ppm

13

Silver,

as

Ag

10.0 ppm

14

Selenium,

as

Se

0.3 ppm

15

Sulphur,

as

S

4.0 ppm

16

Magnesium,

as

Mg

0.4 ppm