U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 46Chapter IPart 131Subpart H - Subpart H—Markings for Fire Equipment and Emergency Equipment
View all text of Subpart H [§ 131.800 - § 131.899]
§ 131.840 - Emergency lighting.

Emergency lighting must be marked with a letter “E” at least 13 millimeters ( 1/2-inch) high.

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