Answer / k.prakashchandra

Both the answers are correct except for calculation error in
No. 1.You have to consider IR drop also. Upto 25 m length 4
A/ sq mm and upto 100 m 2.5 A/ sq mm may be taken as
carrying capacities.

Answer / shantanu mishra

100 Amps. You can take current density as 4 amps per square
mm for copper. For Aluminium cable it can be taken 2 Amps
per square mm. This also depends upon many other factors
such as whether cable is under ground, or burried or
whether it is overhead. tou shouls also takeinto account
ageing factor also.

Answer / shantanu mishra

I will just make a little correction..." you should also
take into account the derating factor.

Answer / sandip

please refer the manufacturer catlog for
this que. but u have to ask that how to
calculate the current carried out in
25sqmm cable ? actully i also dont know
abt the calculation. if any one have
theformula please send iton my mail add.
sandippatel2310@gmail.com

Answer / satveer sagar

1 sq mm will be taken 3 times current

Answer / sri

10 amps because 1sqmm =2.5a

How do you think they do earthing or grounding in ships and aeroplanes?

9 Answers  

explain 100 percent and 95 percent earth faults

1 Answers  

Is it possible to interlock between ACB & MCCB?

2 Answers   Areva,

What is the effect of pi controller on the system performance?

0 Answers  

When the power Factor (p.f)is lead then how the Voltage can rises?

1 Answers  

As per principle we say in three phase supply ,the voltage is producing by phase angle between two phase so two phase is needed means then why we using three phase ?

2 Answers  

why starter use to on a motor

6 Answers   Emco,

what is a bus riser in power system and why it is used

2 Answers  

What are Contactors? How they works and what its highest rating?

0 Answers  

In a Synchronous generator, Can AC voltage be used instead of DC voltage in field winding of rotor to produce AC power?

10 Answers   NTPC, Windia,

What will happen if we on 200kvr capacitor bank(11kv in bus)If there is low load on transformer (1.5 mva 33/11 kv)

0 Answers  

why transformer neutral and CT Secondary neutral is connected to earth?

3 Answers   NCC,