Are boxes and fittings required to be securely fastened in place?

Boxes and fittings must be securely fastened in place according to the National Electrical Code (NEC). This requirement ensures the safety and integrity of the electrical system. When boxes and fittings are securely fastened, they are less likely to become loose or disconnected over time, which could lead to exposed conductors, potential short circuits, or electrical fires. Furthermore, secure fastening helps maintain the physical support of wiring systems, preventing damage and reducing the risk of electrical shock or failure.

In any installation—whether residential or commercial, indoors or outdoors—ensuring that electrical boxes and fittings are properly secured provides both mechanical stability and compliance with safety regulations set forth in the NEC. Therefore, the need for secure fastening is a universal requirement, not conditional on specific scenarios like containing conductors or being located outdoors.