Interested to Buy Any Domain ? << Click Here >> for more details...
Why is copper a better conductor of electricity than
aluminium?
- 5 Answers
- 10781 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
In siemens PLC, why do we want to move the data ?
what is under coal gassification?
how calculate the electrical load for industry and office
what is meaning of 230volts ac 50hzs ac supply is it rms or maximum to getting ac 230v what amount of max voltage they will send
why we not used 11kva as a direct our electrnics component.
hi everybody how to design string combiner box (scb) internal parameters like bus bar and spd (surge protection device and fuse which place to set that,and also bus bar one particular cross sectional how much heat generated and how much power loss tell me Clearly and briefly
can i connect wavetrap in 2 different phase in EHV line?
how oil in the MOCB was reduced compared with OCB? what are the features of the MOCB?
What is proportional controller?
What is kvar?
How do you calculate the actual power consumption of an inductive load appliance. Say, a deep freezer of 200watts
why there using acb enclosure in big buildings
WHAT DO YOU MEAN THE DIFFERENT TYPE OF CURVES OF RELAY LIKE STANDARD INVERSE, VARY INVERSE, NORMAL INVERSE, LONG INVERSE ETC....
why star point of HT motor not earthed?
How to resolve if Diesel generator stop while running ?
