Why must boxes be securely fastened?

Securely fastening electrical boxes is essential because it prevents displacement, thereby ensuring safety in electrical installations. When boxes are properly secured, they maintain their position during normal use and when subjected to vibrations or external forces. This stability minimizes the risk of accidental contact with live wires, which could lead to electrical hazards, fires, or equipment damage. Additionally, securely fastened boxes help protect the wiring and connections contained within from mechanical strain and potential failures.

The importance of safety in electrical work cannot be overstated, and ensuring that boxes are fastened properly is a fundamental part of adhering to safety standards outlined in the National Electrical Code (NEC). This practice not only helps in preventing immediate hazards but also contributes to the overall integrity and reliability of the electrical system over time.