In the National Electrical Code, Article 600 is primarily concerned with which type of installation?

Article 600 of the National Electrical Code is specifically focused on the installation of electric signs and outline lighting. This includes all electrical requirements pertinent to signs, whether they are illuminated or not, and the electrical circuits that supply power to them. The regulations set forth in this article address various aspects such as wiring methods, equipment requirements, and installation practices that ensure safety and reliability in the operation of these lighting systems.

It's important to note that while other installations such as office furnishings, cranes and hoists, and elevators and escalators fall under different articles of the NEC, they do not pertain specifically to Article 600. Each of these other categories is addressed elsewhere within the NEC, focusing on their unique safety considerations and requirements. Therefore, the correct answer accurately reflects the specific focus of Article 600 in the context of electrical installations.