Short answer: substation grounding RFQs should define soil condition, fault current, grounding conductor size, ground rod material, connection method, corrosion risk and required standard.
| Ground grid conductor | Use copper, copper bonded steel, galvanized steel or tinned copper according to fault current, soil and project design. |
|---|---|
| Ground rods | Confirm copper bonded, solid copper, galvanized or stainless rods by soil corrosion and service life requirement. |
| Connections | Use exothermic welding for permanent high-reliability joints or mechanical clamps where inspection and replacement are required. |
| Accessories | Include inspection pits, earth bars, bonding jumpers, clamps, couplers and test points when needed. |
Substation grounding should not be quoted from product names only. Fault current, soil and connection method control the material list.
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