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

The correct answer highlights that a maximum gap of 3 mm (1/8") is permitted between drywall and the edge of a device box or plaster ring. This standard is crucial for ensuring proper installation and safety in electrical work.

Maintaining this specific gap allows for effective cover plate installation while minimizing the risk of exposed wiring. It ensures that the drywall does not impede the functionality of the device and meets code requirements for protecting electrical components from potential damages.

A wider gap could lead to improper fitting of covers or could expose wiring, raising safety concerns. Hence, adhering to the 3 mm gap is essential for maintaining both aesthetic and functional standards in electrical installations.