What is the requirement for securing Type MC cable?

The requirement for securing Type MC (Metal Clad) cable is to ensure it is fastened at intervals not exceeding 6 feet. This standard is in place to prevent excessive movement of the cable, which can lead to wear, potential damage, and safety hazards such as insulation breakdown or electrical faults. By securing the cable at this specific interval, it helps maintain the integrity of the installation while ensuring compliance with safety codes and regulations.

The intervals specified in other options exceed the established maximum for proper installation and could result in insufficient support, thereby increasing the risk of the cable moving or being subject to stress. Adhering to the 6-foot limitation aligns with best practices in electrical installations to ensure reliability and safety.