Слайд 2Energy transmission is one of the basic elements of modern communication

Слайд 3Practically, one can say that communication is carried out due to the

energy being transmitted over the transmitting lines
Слайд 4Lines used for energy transmission are classed into the following three types:

overhead, indoor and underground
Слайд 5These types are different in construction and in the elements they are

made of
Слайд 6As for overhead lines, they include line conductors, insulators and supports

Слайд 7Indoor lines include conductors, cords and buses

Слайд 8The conductors in indoor lines may include one wire or a combination

of wires
Слайд 9As for underground lines, they usually include line conductors and insulators

Слайд 10Underground lines are laid under earth

Слайд 11They are mostly used in cities and in industrial areas.
