commonly called "telephone poles" utility poles are more than just phone service.
They are also electric power, street lights, internet, cable TV, signs, security cameras, traffic lights, signage for pedestrians and seasonal decorations.
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| Anatomy of a utility pole |
things to look for:
• the functions are stratified by height, like life in a tropical forest. Electrical energy to the highest voltage is produced on top. In the US, there are generally three son uninsulated aluminum (each about 1/2 inch thick) spaced in the top bar, held with three insulators.
• For every few homes or businesses, there is a set of transformer-three large cylinders. They reduce the voltage of the primary delivery zone to the secondary distribution area below. Inside the transformer generally there is a copper wire coil wound around a steel core, bathed in oil. They usually do not explode in storms; there is a big cigar fuse is designed to blow.
• The secondary distribution lines are also three just below the level of the transformer. The primary and secondary zones together comprise the "power space."
• street lights, yard lights, and traffic signals are wired to the secondary area . sodium vapor lamps are quickly replaced with LED lights, changing the color of the urban night from yellow to cool white.
• twisted son running off the transformers below buildings carry electrical energy. commercial enterprises with high energy demands require thicker beams.
• the communication area is the lower level. It includes both fiber optic and coaxial cables with junction boxes and transponders. These are usually cables thicker. They are used to the internet, cable television, police and fire alarm systems and telephone.
• There are normally more space between the secondary zones and communication there is in the pole I drew at the top of this post. This space is called the "security zone" and its purpose is to protect telecommunications workers high voltages.
• Telephone cables often can not support their own weight, so they hang or be stowed, uninsulated support strand thinner, and they droop below this strand for stretches. There are various methods (such as loops) used to relieve stress or to store excess cable. The fiber optic cables have sometimes turn to store a longer cable section without cutting or breaking it.
• horizontal rectangular boxes are junction boxes or splice boxes, providing access to telephone connections. They also hang from the support strand.
• You will see thin son linking buildings for telephone service to this level.
• The public sales area or in the courtyard is at the bottom. It includes posters and notice that people post on the post. There are also a number near the base that identifies the pole.
• Poles are black at the bottom of creosote (or a modern substitute) to protect the cluster decay.
• the support cables run on a diagonal and tied to a stake in the ground. Draw straight lines because they are on. They keep upright poles opposing lateral forces. These lateral forces can come from 1) Active in the road, 2) heavy cable systems to connect to the side, or 3) dead ends.
• All son suspended following a catenary curve between the points of support. These can usually be better designed with the artwork in reverse.
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If there are professional services utilities reading this post who can help me to correct any errors, please let me know in the comments
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Read more :.
A very visual book I recommend:
Infrastructure: A Guide to the Industrial Landscape (revised and updated) 
Web Sites:
archetypal electric pole (parts and diagrams)
power and telephone poles CATV (more pictures and explanations)
Wikipedia on the Polish utility provides international concern
archetypal electric pole (parts and diagrams)
power and telephone poles CATV (more pictures and explanations)
Wikipedia on the Polish utility provides international concern
