What does the NESC regulate in electrical work?

The NESC, or National Electrical Safety Code, specifically regulates the spacing and height of overhead power lines and other electrical infrastructure based on the voltage levels they operate at. This ensures safety for both utility workers and the public. The code provides guidelines that help prevent electrical hazards, such as when power lines are too close to buildings or trees, ensuring adequate clearances are maintained to avoid accidents.

In contrast, issues such as wire insulation color coding, the complexity of electrical system designs, and the specific types of materials used for construction are generally governed by other codes and standards, such as the National Electrical Code (NEC) or various building codes, rather than the NESC. These other regulatory frameworks focus on different aspects of electrical systems and their installations, which emphasizes the specific role of the NESC in providing safety standards related to the physical positioning and clearances of electrical infrastructure.