Question: A listed electrical box for use in fire-resistive assemblies is being installed in a two-hour rated wall. Assuming there are no other electrical boxes on

A listed electrical box for use in fire-resistive assemblies is being installed in a two-hour rated wall. Assuming there are no other electrical boxes on the opposite side of the wall, this installation does not require any penetration protection as long as the annular space between the electrical box and the wall membrane does not exceed

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