File:980 us utility pole.jpg
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Summary[edit]
nglish: 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 15 September 2016, 17:13:23 Source Own work Author Chetvorno
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:29, 23 May 2024 | | 545 × 884 (153 KB) | Xanderox (talk | contribs) | nglish: 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 distribu... |
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