Article 690 is concerned with which of the following?

Article 690 of the National Electrical Code (NEC) pertains specifically to Solar Photovoltaic Systems. This article provides the guidelines and requirements for the installation, operation, and maintenance of systems designed to convert sunlight into electricity. It covers aspects such as system components, safety considerations, and performance standards to ensure that solar installations are safe and effective.

Understanding the significance of this article is crucial for professionals involved in solar energy, as it helps ensure compliance with safety standards and promotes the reliable operation of photovoltaic systems. The reference to solar energy specifically distinguishes this article from others that address different types of systems, such as those related to water bodies, fire pumps, or emergency systems. Each of these other topics is covered by different articles within the NEC, ensuring that specialists in those fields have appropriate standards to follow.