What is the recommended way to support a non-metallic box?

The recommended way to support a non-metallic box is by providing adequate support and securing it with clamps. This method ensures that the box is properly stabilized and can accommodate the weight of the cables and other devices that may be attached to it. Adequate support is critical in electrical installations to prevent damage, ensure safety, and facilitate access for maintenance or modifications in the future.

Using screws only for securing the box may not provide the necessary support; while screws can hold the box in place, they do not fully account for the potential movement or strain that may be placed on the box from cables, conduits, or environmental factors. Attaching a non-metallic box directly to drywall is not advisable because drywall alone does not provide sufficient structural support, and over time, the weight can cause the box to pull away from the wall. Additionally, stating that no specific support is necessary overlooks the need for compliance with safety standards set forth in the NEC, which aims to ensure both the functionality and safety of electrical systems.