Which of the following articles focuses on Electric Welders?

The article that focuses on Electric Welders is Article 630. This article specifically addresses the installation, maintenance, and safety requirements for electric welding equipment and systems. It encompasses the guidelines necessary to ensure that electrical connections, conductors, and equipment used in electric welding meet safety standards to prevent hazards such as electrical shock, fire, and equipment damage. The specifications outlined in Article 630 are critical for those involved in welding operations to maintain safe working conditions and compliance with relevant electrical codes.

The other articles listed address different topics within the National Electrical Code. Article 610 pertains to cranes and hoists, Article 626 deals with the requirements for electric vehicle charging systems, and Article 640 focuses on the installation of sound recording and reproduction systems. Understanding the distinctions between these articles is crucial for anyone involved in electrical work, as each article lays out specific regulations that affect different applications and industries.