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File:US utility pole - labeled.jpg

From Wikipedia, the free encyclopedia

Original file ‎(545 × 884 pixels, file size: 153 KB, MIME type: image/jpeg)

Summary

Description
A typical utility pole in North America, showing the hardware for a residential 120/240V split phase service drop. The labeled parts are:
A,B,C - The high voltage primary distribution wires; power is transmitted using the three phase system with 3 wires carrying 60 Hz alternating current with phases 120° apart. The wires are supported by standoff insulators on the crossarm, to which they are tied with tie wires.
D - The neutral wire, which is grounded. This is a "Y" connected distribution line, with the distribution transformers connected between a phase wire and this neutral wire.
E - Fuse cutout which disconnects the transformer from the line in the event of an electrical fault. It can also be opened manually.
F - Lightning arrestor conducts voltage spikes due to lightning strikes and other transient events to ground.
G - Single phase distribution transformer. Its primary winding is connected between one of the phase wires and the neutral wire. Its secondary winding is 240V center tapped. The secondary voltage is brought out to the 3 bushings on the side, consists of two 120V phases and one neutral.
H - Ground wire from transformer case to neutral wire carries the return current from the primary winding.
J - "Triplex" service drop cable carries the secondary current to the residence. It consists of the two opposite 120V phase wires and the neutral, which supports the cable.
K - Communications cables, consisting of a telephone and two cable television lines.
Date
Source Own work
Author Chetvorno

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

Captions

A North American utility pole

Items portrayed in this file

depicts

inception

15 September 2016

File history

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Date/TimeThumbnailDimensionsUserComment
current21:01, 16 December 2017Thumbnail for version as of 21:01, 16 December 2017545 × 884 (153 KB)ChetvornoUser created page with UploadWizard
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