What is the maximum distance between the box and support #1 for the MC cable installation?

The correct answer is 6 inches because the National Electrical Code (NEC) emphasizes the importance of securing and supporting cables to ensure safety and prevent damage. For MC (metal-clad) cable installations, the code stipulates that the maximum distance between the box and the first point of support should not exceed 6 inches. This requirement helps to maintain the integrity of the cable, keep it in place, and prevent strain on the connections, which can lead to electrical issues or hazards. Proper installation practices are vital for compliance and safety in electrical work.