Describe with sketches the process of laying of underground cables by the drawing in method.

Describe with sketches the process of laying of underground cables by the drawing in method. 
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1 Answer

Answer :

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OR

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Procedure:

* A trench of minimum 60cm deep is made along with cable route.

* Width of trench depends on number of conduits to be laid.

* Separate pipes are provided for each cable.

* Spacing between 2 cables (conduit) is between 25 cm to 75 cm.

* Diameter of pipe is 2 to 3 cm, greater than cable diameter for easy handling of cable.

* Pipe used may be cement pipe, DWC pipe or ducts of glad stone are used.

* For Maintenance and other cable work, man-holes are provided at suitable distance.

* Size of man-holes should be large enough to allow a person to enter into duct without difficulty.

* Unarmored cables are used in this type.

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