The National Electrical Code (NEC) Article 480 and NFPA 70 mandate grounding for battery racks. International standards like IEC 62485-2 also outline requirements for stationary battery systems. . While the exact requirements may vary depending on the application and local regulations, there are several general guidelines that apply in most cases. The size of the grounding conductor is one of the most important factors to consider when grounding a battery cabinet. The grounding conductor. . Grounding battery racks neutralizes excess electrical charge, preventing arc faults, fires, and equipment damage. It creates a safe pathway for fault currents to dissipate, reducing the risk of electrocution. Ungrounded systems can accumulate static electricity or voltage surges, which may ignite. . For a standard substation DC battery rack, I am having trouble determining whether a ground is required to be installed along with the wires between the battery disconnect switch and the battery rack. It's 125VDC. Proper earthing ensures stable system performance, protects against corrosion, and complies with. . Alternatives to an SG system include low-resistance grounding (LRG), reactance grounding (RG), and high-resistance grounding (HRG). LRG or RG systems are recommended on medium-voltage systems to limit fault currents while overcurrent protection operates. HRG systems, which limit the fault current. . Direct-current systems must follow the rules in Part VIII of Article 250, and those sections not exclusive of alternating-current arrangements. Follow the grounding rules in sections 250. 162 (A) and (B). Ground two-wire systems supplying premises wiring at a voltage larger than 60 V but not higher. .