Chicago Supervising Electrician Practice Exam

Article 285 of the National Electrical Code (NEC) specifically addresses Surge-Protective Devices (SPDs). These devices are crucial in protecting electrical equipment from voltage spikes or surges, which can be caused by various factors such as lightning strikes or power fluctuations. Article 285 outlines the installation, performance requirements, and testing methods for these devices to ensure they effectively safeguard both people and electrical systems.

SPDs are increasingly important in electrical installations, particularly in areas where sensitive equipment is used. The code provides detailed guidelines on how these devices must be tested and certified to ensure they meet safety and performance standards, thereby promoting reliability and reducing the risk of damage from surge events.

The other options—conductors for general wiring, armored cable, and flat cable assemblies—address different aspects of electrical systems but are not the specific focus of Article 285. Each of those categories has its relevant code sections within the NEC that dictate their safety and installation requirements. However, Article 285 is uniquely dedicated to SPDs, highlighting their importance in modern electrical safety practices.