Article 426 specifically addresses which type of application?

Article 426 of the National Electrical Code (NEC) specifically pertains to fixed outdoor electric deicing and snow-melting equipment. This article outlines the requirements for systems designed to prevent the accumulation of ice and snow on surfaces such as walkways, roofs, and other structures. The focus is on safety, installation methods, and the performance of the systems to ensure effective operation and minimize hazards.

The inclusion of specific provisions for outdoor applications is essential because these installations face unique environmental conditions that could impact electrical safety and performance. The code addresses issues such as proper grounding, circuit protection, and selection of materials suitable for outdoor use, ensuring that installations are safe and reliable in the harsh conditions often associated with winter weather.

While the other options cover important aspects of electrical installations, they do not fall under the scope of Article 426. For example, lighting systems operating at 30 volts or less have their own set of requirements under different sections of the NEC. Similarly, motors and controllers are addressed in another article, as is fixed electric heating equipment for pipelines, which focuses on a different category of heating applications unrelated to deicing or snow melting.