Bower, W. National electrical code changes for 1996 and USA participation in International Energy Agency activities related to photovoltaics safety and grid interconnection, article, January 1, 1995; (https://digital.library.unt.edu/ark:/67531/metadc738844/m1/1/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .