When device boxes are installed in walls or ceilings with a combustible surface such as wood, the edge of the boxes must __________ the finished surface.

Name: When device boxes are installed in walls or ceilings with a combustible surface such as wood, the edge of the boxes must __________ the finished surface.
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Question

Quizplus · Accepted Answer

The device boxes must be flush with the finished surface to ensure there is no gap or space between the box and the combustible material that could potentially allow flames to spread.

When Device Boxes Are Installed in Walls or Ceilings with a Combustible