| S.No. | Field / Checkpoint | Reference | Status |
|---|---|---|---|
| A. EARTH PIT DETAILS | |||
| A1 | Pit no. + location + earth electrode type (plate / pipe / rod / chemical) Acceptance: Per drawing | Per design | OK NC NA |
| A2 | Electrode size + material + depth Acceptance: Per spec | Per IS 3043 | OK NC NA |
| A3 | Earth pit construction date + soil treatment (CGT) Acceptance: Documented | Per IS 3043 Cl. 9 | OK NC NA |
| B. RESISTANCE TEST | |||
| B1 | Earth resistance (Ω) — 3-electrode fall of potential method Acceptance: Per IS 3043 | ≤ 1 Ω for substation; ≤ 2 Ω for LT; ≤ 5 Ω for buildings | OK NC NA |
| B2 | Test instrument — earth tester / megger Acceptance: Calibration certificate | Calibrated | OK NC NA |
| B3 | Test conditions — weather, soil moisture, soil resistivity Acceptance: Logged | Dry season test most stringent | OK NC NA |
| C. MAINTENANCE + RE-TEST | |||
| C1 | Annual re-test mandatory Acceptance: Year tested | Per IS 3043 + maintenance schedule | OK NC NA |
| C2 | Soil treatment renewal (chemical earthing) every 3-5 years Acceptance: Date logged | Per design | OK NC NA |