Modern electricity transmission systems are remarkably efficient, though some energy is always lost in the process. The total amount of loss, encompassing both transmission and distribution, typically ranges from 7% to 15% globally, with some well-maintained systems achieving even lower rates. For high-voltage transmission lines, losses are particularly low, often around 2% to 4% over long distances. The majority of the losses occur in the lower-voltage distribution networks that deliver power to end-users.

Professional Answer: As a leading provider of OHTL and underground cable laying equipment, we at Ningbo Changshi recognize that a core objective for all power line projects is to maximize efficiency. The primary cause of energy loss in transmission is the Joule effect, where electrical resistance in conductors converts a portion of the energy into heat. Our equipment is designed to facilitate the use of high-quality, low-resistance conductors and to ensure optimal tensioning and installation, which are crucial for minimizing this effect. We help our clients achieve maximum efficiency by providing the robust tools and equipment required for meticulous installation and maintenance.