1. IEC 60364-7-712. Electrical installations of buildings. Part 7: requirements for special installations or locations. Section 712: Photovoltaic power supply systems 1997
2. IEC 1173. Overvoltage protection for pv power generating systems — guide 1992-08
3. National Electrical Code (NEC). USA 1999
4. UL 1703. Standard for flat-plate photovoltaic modules and panels. 20 November 1995
5. IEEE P1374. Guide for terrestrial PV power system safety 1998