IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE DIFFERENCE BETWEEN OVER H

IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE
DIFFERENCE BETWEEN OVER HEAD AND UNDER GROUND LAYING THE
CABLES

Question Posted / ramesh.r.t

2 Answers
14069 Views
Cable Wireless, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE DIFFERENCE BETWEEN OVER HEAD AND UNDER GROUND..

In overhead cables, we donot require any cooling media as
air is cooling media. whereas in Under ground cables, in
pucca trench, we put sand around the cable before is it is
cemented.The reason for sand is that it absorb water and can
help in transmit the heat from cable.

Is This Answer Correct ?

5 Yes

2 No

IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE DIFFERENCE BETWEEN OVER HEAD AND UNDER GROUND..

Answer / k.prakashchandra

Sand remains in the form of loose grains forever,hence
location and removal of cable become easy.Overhead cables
require supporting structures and wires.

Is This Answer Correct ?

1 Yes

6 No

Post New Answer

More Electrical Engineering Interview Questions

Why A.C. capacity given in Ton. Ex. - 1.5 Ton

4 Answers Samsung, UltraTech,

Damping resistor provided in open delta (tartiary) winding of a measuring PT at the incoming of a MV inverter drive panel is getting heated up. Can any body explain the reasons and suggest the remedy?

0 Answers Danieli,

If a line which is drawing approximatly 2100amps what should be earthing streep size(using galwanize streep)?

2 Answers

A charge of 240 C is transferred in 2 minutes. The current flowing is:(a) 480A(b) 120A(c) 2A(d) 8A

2 Answers

1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?

0 Answers

Why don't we provide SURGE ARRESTORS for Transformer feeders?

5 Answers

what is maximum or Threshold value of current 7 voltage that a common man can withstand

1 Answers

How to do maintenance of transformer feeder.

0 Answers KSEB, L&T, Siemens,

some times voltage does not built in small generators why ?

2 Answers

what are the reasons for overheating in electrical machines?

3 Answers

What is the meaning of insulation leavel LI 75 AC 28 About scott transformer spcification

1 Answers

What is meant by stator? What is meant by rotor?

0 Answers

For more Electrical Engineering Interview Questions Click Here