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Tubular steel poles are typically used in urban areas. High-voltage lines are often carried on lattice-type steel towers or pylons. For remote areas, aluminum towers may be placed by helicopters. [5] [6] Concrete poles have also been used. [2] Poles made of reinforced plastics are also available, but their high cost restricts application.
A later project in 1968 featured a 150 ft (46 m) fixed-lighting tower on the Texas-Arkansas state line with two other 100 ft (30 m) fixed-lighting towers on either side of the state-border. By 1969/70, winch systems for the lighting systems were developed and several 175 ft (53 m) towers were installed in Dallas and Houston , followed soon ...
Decorative street light in Jakarta. Major advantages of street lighting include prevention of automobile accidents and increase in safety. [61] Studies have shown that darkness results in numerous crashes and fatalities, especially those involving pedestrians; pedestrian fatalities are 3 to 6.75 times more likely in the dark than in daylight. [62]
On poles near a service drop, there is a pole-mounted step-down distribution transformer to transform the high distribution voltage to the lower secondary voltage provided to the customer. In North America , service drops provide 240/120 V split-phase power for residential and light commercial service, using cylindrical single-phase transformers.
Distribution substations inside a small tower-like building are common in Europe. Near Jelenia Góra, Poland. In the United States, distribution transformers are often installed outdoors on wooden poles. In Europe, it is most common to place them in buildings. If the feeding lines are overhead, these look like towers.
SA Power Networks review alternative pole designs available on the market from time to time and has yet to find one with the benefits offered by the Stobie pole, which include long life, low cost and ease of maintenance, and resilience in bushfire and flooding events. One disadvantage is greater susceptibility to lightning strikes.