What standard must grounding jumpers and components meet?

The correct choice is ASTM. ASTM, which stands for the American Society for Testing and Materials, provides standards that ensure materials and components, such as grounding jumpers, meet specific performance and safety criteria. These standards encompass various aspects, such as material properties, tensile strength, corrosion resistance, and compatibility with other materials, which are critical for the reliability and effectiveness of grounding systems in electrical installations.

While other organizations like IEEE (Institute of Electrical and Electronics Engineers), NEMA (National Electrical Manufacturers Association), and UL (Underwriters Laboratories) also establish important safety and performance standards, ASTM is particularly focused on the material properties and testing methods that would be essential for grounding components. Therefore, for specifications related to grounding jumpers and their associated components, ASTM standards are most relevant.