Professional Answer: The voltage of an overhead power line is not always explicitly marked, but it can often be identified by its physical characteristics. This knowledge is crucial for safety and for selecting the correct equipment for a project.

Key indicators to look for include:

• Support Structure: Low and medium-voltage lines are typically supported by wooden, concrete, or tubular steel poles. High-voltage and EHV lines are almost always carried on tall, lattice steel towers.

• Number of Insulators: Insulators are the ceramic or glass discs that separate the conductor from the support structure. A higher number of insulators generally indicates a higher voltage. For instance, a low-voltage line might use small pin insulators, while a 132 kV line could have a string of 5-6 discs, and a 275 kV line would have even more.

• Conductor Configuration: At EHV and UHV levels, multiple conductors are often "bundled" together with spacers. This is done to increase capacity and reduce electrical losses from corona discharge. The number of conductors in a bundle (e.g., two, three, or four) can be an indicator of the voltage level.

Our comprehensive range of overhead tools and accessories, including specialized clamps and fittings, are compatible with all these different line configurations.