How can you find out the voltage of overhead power lines?

The best method to find out the voltage of overhead power lines is to call the power company. Power companies have precise information regarding their infrastructure, including the voltage ratings of their lines. They can provide the most accurate and updated details, which are essential for safety and compliance when working near or with power lines.

Other methods, such as using a multimeter, could pose significant safety risks if the voltage is high due to the potential for electric shock. Asking a colleague might yield an answer, but that response may not be reliable unless the colleague has specific, verified knowledge about that power line. Checking online may not provide the specific information necessary, as voltage levels can vary by location and change over time, making direct communication with the power company the safest and most authoritative option.