Answer / shahin

Rolling is one of the fact....
But the main reason for spiral is mechanical.
In straight wire the share force is less than that of
spiral wire. hance the spiral wire's strength is too much
higher than straight wire.......this is the main fact....

Answer / phani

If it is spiral , the electrical losses are less ( i don't
know exact losses but i can confirm that it is not for easy
to rolling)

Answer / yogan

to produe an inductane effect.

Answer / ashok bhatnagar

The spiraling is done to transpose the three phase current
carrying conductors. This results in near zero net magnetic
field produced by the cable. This is required to minimise
electrical interference to other naerby cables.

Answer / kishor bankar

Under ground cable should be in spiral in shape
insteed of straight,because in staight position there is
formation of capacitance,so charge will develop on core,
due to this cable will be heated.
Also to avoid transposition effect cable should be
run in straight shape in underground.

Answer / hare

TO avoid Eddy current losses

Answer / rk

For flexibility & easy handling to roll over or for laying.

Answer / justin xavier

if it is straight it is very difficult to role in cable
drum thats y it is spiral

Why the core in the distribution transformer is in even number

1 Answers  

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

0 Answers  

What is required of exietation to the alternater.

3 Answers  

Could u pls tell me the NPCIL electrical engineering interview questions for Executive trainee, and also guide me how to face the interview.

0 Answers  

what is vA rating and class of a ct.

0 Answers   L&T,

SUPPOSE A CIRCUIT BREAKER HAS TRIPPED THE THE LINE WHEN A FAULT OCCUR ON IT.NOW WHEN THE FAULT HAS BEEN CLEARED, HOW THE CIRCUIT BREAKER WILL CLOSE AUTOMATICALLY NOT MANUALLY.

6 Answers   Bureau of Energy Efficiency, DVC,

How can you sized or estimate the ligthning arrester current rating?

0 Answers  

According to general circuit diagram of 1-Phase t/f , why the primary is not get short circuited ,even though the supply terminals both are directly connected through primary winding?

4 Answers  

what is a,b,c,d checks diesel generator?

1 Answers   AFMC,

The normal highest generated voltage in India is a) 6.6KV b) 132KV c) 11KV

13 Answers  

keeping in view of parallel operation which of the 3 phase transformer connection are possible? a)delta-delta to delta-star b) delta-delta to star-delta c) star-star to delta-delta d) delta-star to star-delta

4 Answers   Ecil, Siemens,

which surface is suitable for NEUTRAL GROUNDING ?

1 Answers   NTPC,