CFR›Title 10›Chapter II›Part 434›Subpart D ContainsSections 434.401–434.404CorpusDaily eCFRDisplayed edition2026-08-17Last updated2026-08-17 Subpart D—Building Design Requirements—Electric Systems and Equipment Sections 434.401 § 434.401 Electrical power and lighting systems. 434.402 § 434.402 Building envelope assemblies and materials. 434.403 § 434.403 Building mechanical systems and equipment. 434.404 § 434.404 Building service systems and equipment.