Wooden pole, transmission poles and telephone pole sizes

Wooden poles used for the energy sector range from 7 meters to 16 meters. This size of transmission poles is generally used for low voltage to medium voltage power lines however when the kV rating increases then a much larger wooden pole is used. The larger wooden pole is necessary to ensure that enough sag is created in the aluminium power cable. These transmission poles can range from anywhere between 18 meters to 26 meters. Telephone poles and telegraph poles size depends on the environment in which they are installed. The wooden pole size must be large enough to clear the surrounding houses and other buildings, approximately 12 meters.