Electrician's Licensing Practice Exam

Which article of the NEC covers cable trays?

1. Article 310

2. Article 392

3. Article 250

4. Article 230

The correct answer is: Article 392

The National Electrical Code (NEC) provides guidelines and requirements pertaining to various aspects of electrical installations, including the use and installation of cable trays. Article 392 specifically addresses cable trays and covers essential topics such as their design, installation, and the requirements for supporting and securing the cables within them. This article outlines how cable trays should be constructed, the types of cables that can be used within them, and the appropriate installation practices to ensure safety and reliability in electrical systems. In contrast, the other articles refer to different aspects of electrical work: Article 310 focuses on the conductors for general wiring and installation practices, Article 250 discusses grounding and bonding, and Article 230 pertains to service entrances and service equipment. Understanding the specific article that relates to cable trays is crucial for electricians when planning installations or ensuring compliance with electrical codes.