High voltage lines are essential components of the electricity supply infrastructure that are used to transmit electricity over long distances. This term is commonly used today, but there are many other ways to describe these electrical lines. Some widely used synonyms for high voltage lines include overhead power lines, transmission lines, and electric transmission lines. Other synonyms that are commonly used include power cables, power grids, and electrical conduits. Regardless of what term is used to describe these lines, it is important to always exercise caution around them, since exposure to high voltage electrical current can be extremely dangerous or fatal.