Featured in Latin sunrise – 04-2012

Ground-fault protection

Electrical standards for PV systems: In part one of this series we looked at the background and scope of the U.S. National Electrical Code (NEC). We continued with a survey of 2011 NEC coverage of solar PV systems. Article 690 starts with 23 basic definitions, followed by general installation requirements for all non-utility solar PV systems. In part two, we continue with Section 690.5, Ground-Fault Protection.
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pv magazine

DC PV arrays, like electrical systems in general, may be grounded or, under limited conditions, ungrounded. When we say “grounded” in this context, we are not talking about the presence of an equipment grounding conductor, which is required in nearly every situation. What is referred to is the connection to ground of one of the …

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