What type of equipment is covered in Article 630?

Article 630 of the National Electrical Code (NEC) specifically addresses the requirements for electric welders. This article outlines the installation, operation, and safety considerations related to welded electrical equipment, ensuring that they meet certain standards to protect both users and infrastructure.

Understanding that electric welders operate under unique electrical demands and present specific hazards—like high voltage and potential arcs—Article 630 provides crucial guidance on proper grounding, circuit protection, and load calculations. These requirements help mitigate risks associated with the intense electrical current involved in welding processes.

The other options listed, while they represent different types of specialized electrical equipment, fall under different articles in the NEC. For instance, X-ray equipment is covered under Article 517, which is focused on health care facilities, while pipe organs and audio signal processing equipment are governed by other sections concerning their specific applications and safety measures. This differentiation helps ensure that each type of equipment adheres to the necessary safety and operational standards relevant to their unique functions and hazards.