To ensure safety, oxyfuel gas welding and cutting equipment should be listed by which organization?

Oxyfuel gas welding and cutting equipment safety is critical in preventing accidents and ensuring proper functioning. Equipment that is listed by a nationally recognized testing laboratory indicates that it has been evaluated and meets specific safety standards and performance criteria established by that laboratory. These organizations, such as Underwriters Laboratories (UL) or the American National Standards Institute (ANSI), have rigorous testing protocols in place to assess the safety and reliability of various equipment, including welding tools.

By relying on equipment that is certified by a nationally recognized testing laboratory, users can be more confident that the equipment adheres to industry safety standards, reducing the likelihood of hazards such as fires or explosions during operation. This certification is particularly essential in environments where safety is paramount and compliance with regulations needs to be demonstrated.

The other options, while they may involve aspects of safety or regulations, do not directly pertain to the specific testing and certification of welding and cutting equipment as effectively as a nationally recognized testing laboratory does. Therefore, ensuring equipment is listed by such an organization is fundamental to maintaining safety in oxyfuel gas welding and cutting operations.