Electrician's Licensing Practice Exam

What does NEC Article 250 primarily address?

1. Service drops

2. Grounding requirements

3. Fixture wiring

4. Cable trays

The correct answer is: Grounding requirements

NEC Article 250 primarily addresses grounding requirements, which are essential for ensuring the safety and proper functioning of electrical installations. Grounding provides a pathway for fault current to safely dissipate into the earth, reducing the risk of electric shock, fire, and damage to equipment. This article outlines the methods and principles for establishing, maintaining, and testing grounding systems, including the use of grounding electrodes, grounded conductors, and bonding techniques. By focusing on grounding, this article helps electricians understand the critical importance of grounding systems in preventing electrical hazards and ensuring compliance with safety standards. The other topics mentioned, such as service drops, fixture wiring, and cable trays, fall under different sections of the NEC and do not directly address the fundamental grounding principles outlined in Article 250. Understanding these grounding requirements is crucial for any electrician to perform their work safely and effectively.