For carrying of overhead line, wooden poles, concrete poles, steel poles and rail poles are used. Which poles are to be used, depending on the importance of load, location, and place, cost effect of such construction, including maintenance cost, and keeping its profit element in mind. In low voltage line for all phases, natural and earth we use single pole line. There are different types of poles used in the electrical system.

          In earlier period wooden poles were used for 400 volts and 230 volts L.T. line and 11 K.V. H.T. line in a massive way. In some occasion for 33 KV line, we used wooden poles . The cost-effectiveness of a wooden pole is much less in comparison to other electric pole and the expenditure incurred for its foundation is also comparatively very less. If proper maintenance and treatment are done on the wood, the wooden pole last for a long period.