02086nam 2200373 450 991013643290332120231206214114.01-5044-0337-110.1109/IEEESTD.1973.7419177(CKB)3710000000601316(NjHacI)993710000000601316(EXLCZ)99371000000060131620231206d1973 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierIEEE Std 420-1973 (ANSI N41.17) IEEE Trial Use Guide for Class 1E Control Switchboards for Nuclear Power Generating Stations /Institute of Electrical and Electronics EngineersNew York, N.Y. :IEEE,1973.1 online resource (12 pages) illustrationsThis document applies to all Class 1E control switchboards (for example, main control room assemblies, auxiliary panels, local panels or racks, etc) as defined in Section 3, regardless of their application or location. It does not apply to the non-Class 1E control switchboards, except as they affect the Class 1E control switchboards, but recognizes that Class 1E control switchboards may be adjacent to, or joined with, other non-Class 1E control switchboards. This document includes, but is not necessarily limited to, design, construction, wiring practices, shipping, handling, storage, installation, testing, and quality assurance. General design practices which are not unique to Class 1E control switchboards are not addressed in this document. This document applies to piping systems and Class 1E equipment only as they may affect the integrity of the Class lE control switchboard.IEEE Std 420-1973 Switching theoryElectric power distributionSwitching theory.Electric power distribution.621.381537NjHacINjHaclDOCUMENT9910136432903321IEEE Std 420-1973 (ANSI N41.17)3646333UNINA