U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 10Chapter IIPart 434Subpart D - Subpart D—Building Design Requirements—Electric Systems and Equipment
§ 434.401 - Electrical power and lighting systems.
§ 434.402 - Building envelope assemblies and materials.
§ 434.403 - Building mechanical systems and equipment.
§ 434.404 - Building service systems and equipment.
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