Can an electrical box be mounted on a wall without any support?

An electrical box must be securely fastened with adequate support to ensure safety and reliability in electrical installations. This requirement is crucial because improperly supported boxes can lead to various risks, including physical damage to the box itself, compromised electrical connections, and potential fire hazards. The National Electrical Code (NEC) emphasizes the importance of secure mounting to protect against these dangers.

Mounting a box without proper support could result in movement, which may loosen connections within the box or damage the wiring, leading to hazardous conditions. Even lightweight boxes require secure mounting because the stability of electrical systems is essential for safe and efficient operation. Therefore, fastening boxes appropriately is a fundamental practice in electrical installations to maintain safety standards and ensure compliance with the NEC.