NEC Commercial Electrical Practice Test

What is required for conductors installed in subsurface enclosures that people enter for maintenance?

1. Bundled

2. Racked

3. Loosely placed

4. Conductively shielded

The correct answer is: Racked

Conductors installed in subsurface enclosures that people may enter for maintenance must be racked. Racking ensures that the conductors are organized and secured in a manner that minimizes the risk of damage or strain to the conductors themselves, while also making them accessible for maintenance purposes. Proper racking helps to prevent tangling or bunching of the conductors, which can lead to overheating or electrical faults. Additionally, maintaining a neat arrangement of conductors is crucial for safety and efficiency in environments where personnel are likely to work. This organization can facilitate easier inspections and repairs since the conductors are clearly laid out rather than being crowded or entangled with other components. Other choices, such as loosely placed, could lead to safety hazards or damage over time, and bundled conductors may not allow for proper heat dissipation. Conductively shielded refers more to an insulation method rather than a physical organization strategy for conductors in accessible areas. Racking effectively meets the safety and accessibility requirements for maintenance workers.