Practical application of the National Electrical Code to photovoltaic system design

Abstract

Problems in applying the National Electrical Code (NEC) to PV power system design and installation are presented. Generic design requirements are discussed, including switching, DC collection, ground-fault detection, and disconnection. A DC-service panel concept is introduced as a practical approach to meeting both NEC and functional design requirements. A sample design and economic assessment are provided to support this concept.<>