How can you tell the voltage of an overhead power line just by looking at it?

2025-08-10

While only a professional can safely determine the exact voltage, you can often get a general idea by observing the characteristics of the line and its support structure. A key indicator is the type and number of insulators used. Higher voltage lines require more robust insulation to prevent electricity from arcing to the tower or pole. Therefore, you will typically see:

  • Low Voltage: Small pin insulators on smaller wood poles.

  • Medium Voltage: Pin insulators or a small string of disc insulators.

  • High Voltage: Long strings of disc insulators on large steel towers. The more insulators in a string, the higher the voltage.

As a manufacturer of quality tools and equipment, we provide the necessary gear for technicians to safely work on these different types of power lines.

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