What must cabinets and cutout boxes contain to avoid crowding of conductors?

To prevent the crowding of conductors within cabinets and cutout boxes, it is essential that these enclosures contain approved space. Approved space refers to areas that are designated and compliant with electrical codes and regulations, ensuring that conductors can be securely managed without being overcrowded. This not only aids in maintaining the integrity of the electrical system but also facilitates safe installation and ease of access for future maintenance or modifications.

Having an appropriate amount of approved space allows for proper separation of conductors, which is critical for heat dissipation, minimizing the risk of electrical faults, and ensuring the safe operation of electrical circuits. When conductors are crowded, it can lead to overheating and increased risk of failures, which must be avoided for both safety and reliability.

In contrast, options suggesting minimum area, excess space, or sealed enclosures do not adequately address the specific needs related to conductor management and safety standards. Approved space is a requirement stipulated in electrical codes to ensure optimal performance and safety in electrical installations.