Page 330 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

Fig 3

Fig 4 Fig 5

Before the pole is placed into the pit, RCC padding or alternatively a suitable base plate maybe given below the
pole to increase the surface contact between the pole and the soil. The padding will distribute the density of the
pressure due to the weight of the pole on the soil.
Having lifted the pole, the same should be kept in a vertical position with the help of Manila /sisal ropes of 20/25
mm dia. using the rope as a temporary anchor. As the poles are being erected, say, from an anchor point to the
next angle point, the alignment of the poles are to be checked and set right by visual check. The verticality’s of
the poles are to be checked with a spirit level on both transverse and longitudinal directions.
Having satisfied that the vertical and longitudinal alignment are all right, earth filling is to be done. In some soils
the poles are to be concreted up to ground level of the pit. After the poles have been set, the temporary anchors
are to be removed.
Use of cross - arms : These are also known as insulator supports and are made of either wood or angle iron.
Cross- arms are installed at the top of the pole for holding the insulators on which conductors are fastened. They
are also known according to their relative position on the poles. If the cross - arm is fixed in the centre of the poles

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CITS : Power - Electrician & Wireman - Lesson 106-116 CITS : Power - Electrician & Wireman - Lesson 106-116