What does Article 314 require for through-the-wall box installation?

Article 314 of the National Electrical Code addresses the installation requirements for electrical boxes, including through-the-wall boxes. The primary focus is on safety and the prevention of hazards related to electrical installations.

The requirement that the box must be secured and capable of maintaining structural integrity under expected loads is essential because it ensures that the box will not be displaced or compromised due to stress from cables, equipment attached to it, or other factors. A securely installed box contributes to the overall safety of the electrical installation, as it minimizes risks such as electrical fires or accidental disconnection of wires, which can occur if the box is unstable.

By adhering to this requirement, electricians help ensure that the wiring is protected and that the box can withstand the various forces it may encounter when in use. This is particularly important in through-the-wall installations, where the box may be subjected to different types of load and environmental conditions.

While other choices may suggest either a lack of need for security or a flexibility that could undermine safety, the correct choice highlights the importance of both secure installation and adherence to the code for structural integrity, thereby promoting safe and reliable electrical systems.