Sheathed cable must be supported within what distance from a connection?

Sheathed cable, often referred to as non-metallic sheathed cable or NM cable, must be properly secured and supported to ensure safety and functionality within electrical installations. According to the National Electrical Code (NEC), sheathed cable must be secured within a certain distance from connections such as junction boxes, outlets, and fixtures. This requirement helps prevent stress on the cable and connections, reducing the risk of damage or wear over time.

The correct answer indicates that sheathed cable should be supported within 12 inches from a connection. This rule is important because too much slack or improper support can lead to a variety of hazards, including the risk of mechanical damage, overheating, or potential electrical shorts. Adhering to this standard is essential for maintaining the integrity and safety of electrical systems in residential and commercial settings.

In summary, supporting sheathed cable within 12 inches from connections ensures not only compliance with safety regulations but also enhances the longevity and reliability of the electrical installation.