Rightsizing Commercial Electrical Power Systems: Review of a New Exception in NEC Section 220.12

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dc.contributor.authorHarman, Thomas L.
dc.date.accessioned2018-05-07T17:21:56Z
dc.date.available2018-05-07T17:21:56Z
dc.date.issued2016-05-02
dc.descriptionen_US
dc.description.abstractFor decades, the application of National Electrical Code (NEC) rules for sizing services, feeders, and branch circuits has resulted in unused capacity in almost all occupancy classes. U.S. Department of Energy (DOE) data compiled in 1999 indicate the average load on building transformers to be between 10% and 25%. More recent data gathered by the educational facilities industry have verified this claim. Recognizing that aggressive energy codes are driving energy consumption lower and that larger-thannecessary transformers create a larger-than-necessary flash hazard, the 2014 NEC provided an exception in Section 220.12 that permitted designers to reduce transformer kilovoltampere ratings and all related components of the power delivery system. This was a conservative, incremental step in the direction of reduced load density that is limited to lighting systems. Further study of feeder and branch circuit loading is necessary to inform discussions about circuit design methods in future revisions of the NEC.en_US
dc.description.sponsorshipIEEE Industry Applications Societyen_US
dc.description.uri
dc.identifier.citationM. A. Anthony, T. L. Harman and J. R. Harvey, "Rightsizing Commercial Electrical Power Systems: Review of a New Exception in NEC Section 220.12," in IEEE Industry Applications Magazine, vol. 22, no. 4, pp. 41-46, July-Aug. 2016. doi: 10.1109/MIAS.2015.2459090en_US
dc.identifier.issn1077-2618
dc.identifier.urihttp://hdl.handle.net/10657.1/886
dc.language.isoen_USen_US
dc.publisherIEEEen_US
dc.relation.urihttps://libproxy.uhcl.edu/login?url=http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7463528&isnumber=7486185
dc.subject.lcshElectrical engineering--Standards--United States
dc.subject.lcshElectrical engineering--Law and legislation--United States
dc.subject.lcshElectric transformers
dc.subject.lcshElectric circuits
dc.titleRightsizing Commercial Electrical Power Systems: Review of a New Exception in NEC Section 220.12en_US
dc.typeArticleen_US

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