What is the maximum gap allowed between drywall and the edge of a device box or plaster ring?

The maximum gap allowed between drywall and the edge of a device box or plaster ring is 3 mm (1/8"). This standard is set to ensure that there is a proper alignment between the drywall and the device box, which is crucial for both aesthetics and functionality. A gap that is too large can lead to issues such as reduced structural support for devices, challenges in securing the drywall properly, and potential hazards in terms of insulation and fire safety. Keeping the gap minimal allows for proper sealing and ensures that any finishes, such as paint or trim, adhere correctly without leaving unsightly gaps.

In contrast, options that suggest larger gaps do not meet the smaller tolerance required by codes and best practices, which emphasize the need for closely aligned surfaces throughout the installation process. Therefore, adhering to the 3 mm standard helps maintain both the integrity and the appearance of the finished work.