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Membrane Penetrations in Fire-rated Wall Assemblies by Electrical Boxes and Similar Penetrating Items Code Requirements, Application and Inspection Guidance

NEMA BI 50032 - 2025 | Status: Active | ID: 2926933

This document provides guidance to installers, AHJs, and users of electrical outlet boxes in buildings that have specific fire ratings between sections of buildings. The fire ratings of specific walls are determined by the appropriate Building Code provisions. These ratings can vary from minutes to hours and are designed to limit fire encroachment from one area of a building to another thereby assisting in safe evacuation of buildings during fire operations.

Published Date: October 10, 2025

Number of pages: 12

Staff Contact: Daniel Abbate

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Keywords

OUTLET BOX, FIRE, FIRE PROTECTION, METAL ELECTRICAL BOX, FIRE RESISTANCE, NATIONAL ELECTRIC CODE, INTERNATIONAL BUILDING CODE, ELECTRICAL OUTLET BOXES, FIRE RATINGS, NON-METALLIC ELECTRICAL BOXES, COMPLIANCE METHODS