Grounding ball studs are permanent grounding components that enable the attachment of universal and ball stud clamps in electrical systems, including apparatus, bus bars, conductors, vehicles, and reels. Their spherical form permits installation at multiple angles, facilitating access to confined or hard-to-reach areas while maintaining universal clamp compatibility across different electrical setups.
These studs meet American Society for Testing and Materials (ASTM) F855 and International Electrotechnical Commission (IEC) standards, such as IEC 61230, with specific withstand ratings for fault current. For example, 20mm and 25mm ball studs are rated for 35kA per IEC and 47kA per ASTM, while 30mm studs handle 60kA per IEC and 74kA per ASTM. Some models are tested to Grade 5 withstand ratings, such as 43kA for 15 cycles or 30kA for 30 cycles.
Applications include truck-grounding systems, industrial metalclad gear, substations, and distribution systems, both overhead and underground. Their compact design delivers high-current ratings suitable for switching equipment and other demanding environments. Constructed from materials like 99.9% electrolytic tin-plated copper or tin-plated bronze alloy, these studs often include stainless steel or silicone bronze hardware, such as washers, lock washers, and nuts.
Available sizes feature ball diameters of 20mm, 25mm, and 30mm, with thread sizes including 1/2″-13 and 5/8″-11 to fit National Electrical Manufacturers Association (NEMA) terminal pads. Shank lengths include 3 inches nominal, with overall lengths ranging from approximately 4.25 inches to 7 inches. Installation torque recommendations are typically 25 ft-lb or 300 in-lbs, with current ratings up to 400 A.
Enhance Electrical Safety with RaxPower Grounding Ball Stud Supplier
RaxPower offers a comprehensive selection of grounding ball studs, tailored to meet the diverse needs of professionals in the electrical, utility, and related industries. Permanent grounding ball studs permit universal and ball stud clamps to be used for different electrical systems and allow installation at various angles to reach inaccessible areas. They meet ASTM and IEC standards and are made from 99.9% electrolytic tin-plated copper with included stainless steel hardware.
As China’s leading manufacturer of pole line hardware established in 2003, RaxPower has over 21 years of manufacturing and exporting experience, leveraging advanced hot forging technology to ensure these grounding ball studs exhibit greater strength and precise sizing.
Strict quality control, including raw material selection, multi-stage testing, and 100% quality reviews, guarantees reliability and compliance. Available in various sizes and configurations, we provide a one-stop solution for all your grounding needs. Please submit an inquiry and we will be in touch soon!
| Ball Diameter (mm) | Thread Size | Shank Length (in) | Overall Length (in) | Material | Weight (lbs) | ASTM Grade | Fault Current – IEC (kA) | Fault Current – ASTM (kA) | Installation Torque (ft-lb) | Current Rating (A) |
|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 1/2″-13, 5/8″-11 | 3 (nominal) | 4.25 – 7 | 99.9% electrolytic tin-plated copper or tin-plated bronze alloy with stainless steel or silicone bronze hardware | 0.2 – 0.9 | Grade 5 | 35 | 47 | 25 | 400 |
| 25 | 1/2″-13, 5/8″-11 | 3 (nominal) | 4.25 – 7 | 99.9% electrolytic tin-plated copper or tin-plated bronze alloy with stainless steel or silicone bronze hardware | 0.4 – 1.2 | Grade 5 | 35 | 47 | 25 | 400 |
| 30 | 5/8″-11 | 3 (nominal) | 4.25 – 7 | 99.9% electrolytic tin-plated copper or tin-plated bronze alloy with stainless steel or silicone bronze hardware | 1.8 – 1.9 | Grade 5 | 60 | 74 | 25 | 400 |
Related Products
Frequently Asked Questions (FAQS)
What is a grounding ball stud and what are its primary applications?
Grounding ball studs are permanent components that permit universal and ball stud clamps to be used for different electrical systems such as apparatus, bus bar, conductors, vehicles, and reels. They facilitate secure grounding connections in diverse settings.
Are your grounding ball studs certified for use in high-voltage utility grids and critical infrastructure?
Yes, RaxPower's grounding ball studs are designed to meet ASTM and IEC standards. For 20mm and 25mm sizes, ratings are 35kA per IEC 61230 and 47kA per ASTM F855. For 30mm sizes, ratings reach 60kA per IEC 61230 and 74kA per ASTM F855, ensuring compliance and reliability for grid maintenance and expansion.
What materials and processes ensure long-term durability and corrosion resistance in your ball studs?
RaxPower uses 99.9% electrolytic tin-plated copper for all grounding ball studs, providing excellent conductivity and corrosion resistance. Stainless steel hardware, including washers, lock washers, and nuts, is included to enhance durability and performance in harsh environments.
Are your ball studs suitable for installation in confined or hard-to-reach areas common in telecommunications or railway applications?
Absolutely. The spherical form of RaxPower's grounding ball studs permits installation at various angles to reach the most inaccessible areas. They are designed for restricted-space applications, such as in telecommunications for ADSS/OPGW accessories or in railway electrification for overhead catenary systems, providing versatility and ease of use.
What is the recommended installation torque for grounding ball studs?
The recommended installation torque is 25 ft-lbs, ensuring secure and proper mounting without damage.
What sizes and configurations are available for grounding ball studs?
Grounding ball studs come in various sizes such as 20mm, 25mm, and 30mm ball diameters, with thread sizes including 1/2 -13 and 5/8 -11, and different shank lengths. Other lengths may be available upon request.
Can you accommodate custom length requirements for large-scale projects like EPC contracts or renewable energy installations?
Yes, RaxPower offers customization options, including custom lengths available upon request. This flexibility allows us to meet the specific dimensional needs of large-scale projects, ensuring on-time delivery and tailored solutions for unique specifications.
Get A Quick Quotation Today
