Electrician's Licensing Practice Exam

What does NEC Section 250-122 focus on?

1. Grounding conductor sizes

2. Bonding jumpers

3. Service drop distances

4. Clearances from ground

The correct answer is: Grounding conductor sizes

NEC Section 250-122 specifically addresses the sizing of equipment grounding conductors for feeders and branch circuits. It provides guidelines to ensure proper grounding practices that are crucial for safety and the protection of electrical systems. This section outlines how to calculate the minimum size of grounding conductors based on the overcurrent protection device rating, the type of installation, and the specific requirements for grounding conductors in various scenarios. Understanding this section is important for electricians, as proper grounding is vital for preventing electrical shock, equipment damage, and ensuring the effectiveness of protection devices. The other choices, while also important in electrical safety and installation, pertain to different aspects of the National Electrical Code, such as bonding jumpers, service drop requirements, and clearance guidelines, but are not the focus of Section 250-122.