Pipe Earthing | Type of Earthing | Electrical Engineering Theory

Pipe Earthing | Type of Earthing| Electrical Engineering Theory

Electrical safety is more important for all electrical engineer. So knowledge about electrical safety is necessary for all electrical engineer. Now we discuss about pipe earthing in this article.

Pipe Earthing is one of the type of earthing. We know that the earthing is more important for electrical safety. Description of pipe earthing is provided below.

The pipe is used in pipe earthing as per name and pipe used as a earth electrode which is galvanized.

As per ISI standard the diameter of pipe is always less than 38 mm and 2 meter long for normal soil but for dry and rocky soil, length of pipe is increased up to 2.75.

The pipe diameter is effect on the earth resistance connection. Pipe is always placed in wet ground.

The condition of moisture and soil is also depends in the depth of the pipe. According to ISI standard the pipe depth keep must be 4.75 meters and also which is depends on moisture.

The pipe is placed at the right in the pit and which bottom is have tapered casting.

At the up to 2 meter, Salt and charcoal are filled in the pit as the form of layer. The bottom end for a distance is about 15cm around nearer the pipe which is increase dampness and moisture around each pipe.

12 mm diameter holes are drilled in the pipe so that the poured water on the top is spread in the charcoal layers through the holes to the earth resistance. The area of pit about 40 (cm)2 is dug in the soil.

At the top. a cement concrete work is made for the production of earth pipe from mechanical damage and also to facilitate water pouring arrangements for provision of dampness.

A funnel with wire mesh is provided in the concrete work so that water is put through that funnel in order to have an effective earth. The pipe to which funnel is connected is further connected to main earthing pipe

Another G.I. pipe is taken from the funnel towards outer side for its connection to earth wire. According to I. S. L. specifications, a G. I. wire of size not less than 8 S. W. G. should be used for earthing in case of small installations

The earth wire from the G. I. pipe of 19 mm diameter should be carried in a G. I. pipe of diameter 12.7 mm at a depth of about 60 cm below the ground.

The size of continuous earth wire used with cables in domestic installation should not be less than 14 S. W. G. in any case. It is important to mention that the earth wire must be electrically continuous.