What is the primary focus of Article 669 in the National Electrical Code?

The primary focus of Article 669 in the National Electrical Code is on electrically driven or controlled irrigation machines. This article provides guidelines and requirements pertinent to the installation, maintenance, and safety of irrigation systems that operate using electricity. Such systems are crucial for agricultural and landscaping applications, where precision and reliability are essential for effective water management.

While the other options may involve electrical standards in some context, Article 669 specifically addresses the nuances of electrically powered irrigation equipment. This includes considerations for wiring, protection against water ingress, control methods, and installation practices that cater specifically to irrigation needs.