422.21 Covering of Combustible Material at Outlet Boxes.

Only certain ceiling materials are considered combustible such as this tongue and groove wood ceiling.
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Only certain ceiling materials are considered combustible such as this tongue and groove wood ceiling.

Code Change Summary: A new code section requires protection for an exposed combustible surface under a ceiling fan canopy.

A new code section now requires special protection for any exposed combustible surface under a ceiling fan canopy. The new code section makes it clear that if an exposed combustible surface exists between the edge of a fan canopy and the outlet box, then the surface must be protected with noncombustible material.

A few important things to keep in mind when applying this code section:

Below is a preview of the NEC®.  See the actual NEC® text at NFPA.ORG for the complete code section. Once there, click on the “free access” tab and select the applicable year of NFPA 70 (National Electrical code).

2014 Code Language:

422.21 Covering of Combustible Material at Outlet Boxes. Any combustible ceiling finish exposed between the edge of a ceiling-suspended (paddle) fan canopy or pan and an outlet box shall be covered with noncombustible material.

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422.21 Covering of Combustible Material at Outlet Boxes.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Which of the following is true when installing a ceiling fan over an outlet box, recessed into a wood ceiling finish?

A: Any exposed combustible surface under the fan canopy must be covered with noncombustible materials.
B: Any combustible surface under the fan canopy must be covered with combustible materials.
C: A sheetrock surface under the fan canopy must be covered with noncombustible material.
D: A concrete surface under the fan canopy must be covered with noncombustible material.
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