Interested to Buy Any Domain ? << Click Here >> for more details...
Why is copper a better conductor of electricity than
aluminium?
- 5 Answers
- 10958 Views
- AES, I also Faced
- E-Mail Answers
Answer Posted / arul
The electrical capacity of any type of cables/wires are
depending on the heat withstand capacity of the material
wich can be calculated with the product of square of
current, Resistance of the material and Total time for flow
of current. I2RT. Resistance again can be calculated as
R=rho*L/A where rho is the resistivity, L is the length and
A is the area of cross section. So for a fixed current flow
and fixed Length of wire the area of cross section of the
cable is directly propotional to the resistivity.
resistivity of copper is 1.68x10 power -8 and that of Pure
Aluminum is 2.82x10 power -8. So.. for a specific current
flow, an aluminum cable size shall be 1.7 times that of
copper cable. This also is not recommented as the Aluminum
resistivity varries with the alloys and even with casting.
2.5 times the size of copper can be recommented for
Aluminum cables. Also as the temporature expansion of
Aluminum is 3 times that of copper. So all the termination
and joining areas shall be treated more sensible that of
copper.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
how to calculate current and voltage in a same circuit?
What are stable systems?
wat system call?
in basic 2 phase will short means tripping the power but spot welding 2 phase shorting but not tripping it will welded why.....(Q)
how many load we can take for lighting
pls tell us AC plant are how do work and parts name with picture
what material is the electrical housing wire made of? is there any difference for the telephone lines?
what does a k rating in a transformer means?
How each of the following losses occur in d.c machines (i) copper (2)core (3) windage (4)friction please help me
Why IR value of the (HT cable Plus synchronous motor) is less while individually having IR values in GΩ?
upto how many load can v connect to stabilizer which is used for tv
how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable
What is power factor why we should maintain the power factor unless what will happen
how the characterstics of control valve being done
whether fibre optic cable in high voltage earth conductor is used for protection circuits
