Has anything changed in the 2014 NEC about higher voltage PV systems?
NECA Article by Mark Ode
Article 690, which covers solar photovoltaic systems, has been totally revised for the new NEC with easier to understand and use text; the requirements also have been placed in a more logical order to make it easier to use the article. 
 - See more at:
http://www.ecmag.com/section/codes-...er-new-nec#sthash.Qn5OsDBN.dKaj8SbW.dpuf
