What is the maximum distance EMT shall be securely fastened within of outlet boxes?

The correct answer indicates that electrical metallic tubing (EMT) must be securely fastened within a maximum distance of 3 feet from outlet boxes. This requirement is established to ensure the stability and safety of electrical installations. Fastening EMT within this distance helps prevent physical damage to the conduit and reduces the risk of electrical hazards. Proper securing methods help maintain the integrity of the conduit system and ensure that wires within are protected from mechanical stress and potential exposure.

Understanding this distance is critical for anyone working with electrical systems, as it reflects standard practices intended to promote safety and functionality. Outlining the distances for securing EMT contributes to the overall compliance with electrical codes and industry standards, which ultimately protect both installation personnel and end-users from potential accidents or malfunctions.