Why are the electric lines never hung tightly to the poles?
Answers
The reason is to minimize the tension in the wire. The wires expand when exposed to intense heat from sun and contract during cold weather.
Stretching the wire and connecting to the poles will make the wires loosen up and tear easily. This might lead to an accident.
So they are allowed to sag and tied loosely to the electric poles.
The electric wires which are hung from pole to pole, if they are tightly held then they might get torn during the winter season. The reason for the answer is that because of the linear expansion of a metal, metal expands during summer and contracts during winter season.
So if the wires are tightly held they might get torn due to the extreme pressure which will be created during the winter season which may result in disconnection of the power supply. So they are made slightly loose so that that tension can be adjusted during the summer and winter season.