What Is Supplementary Bonding?_
Supplementary bonding is a safety measure required in electrical installations to ensure that all metallic enclosures, cable trays, and structural elements within a GPU data center are at the same electrical potential. It is typically applied in addition to the main protective earthing system, especially in areas with liquid cooling or high-density power distribution. This practice reduces the risk of electric shock from fault currents and protects sensitive GPU networking equipment from potential differences that could cause damage.
Technical Details
Supplementary bonding is installed using copper conductors sized per the relevant electrical code, connecting equipment frames, rack rails, and cooling manifolds to the facility's grounding grid. In liquid-cooled racks, bonding must include all metallic coolant pipes and fittings to prevent galvanic corrosion and ensure fault current paths. The bonding conductors are often routed alongside power cables and terminated with compression lugs or exothermic welds. Testing with a micro-ohmmeter verifies continuity and low impedance between bonded parts, typically below the threshold specified by the applicable standard.
How Leviathan Systems Works with Supplementary Bonding
During Leviathan Systems rack assembly and commissioning, supplementary bonding is verified on every GPU rack, especially where liquid cooling loops introduce additional metallic components. Our field crew checks bonding connections between rack frames, cable management arms, and cooling distribution units before powering up the high-density GPU systems.
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GPU Rack Assembly & Rack-and-Stack →