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