| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| ACTIVITY_1. Phase 1: Earth System Installation | |||
| 1.1 | Earth pit excavation and preparation (pit dimensions, backfill material sourcing) Acceptance: Pit excavated to depth, charcoal-salt backfill prepared, ready for electrode insertion | Completion of earth pit construction per IS 3043 | OK NC NA HOLD |
| 1.2 | WITNESS POINT: Earth electrode insertion and bonding (QC must witness electrode driving) Acceptance: Electrode driven vertically without bending, connections bolted, location marked on site plan | Earth electrode installation witnessed by QC | OK NC NA HOLD |
| 1.3 | Earth conductor routing from pit to DB (conduit/tray protection, earthing continuity verification) Acceptance: Conductor routed and protected, continuity test performed ≤ 0.5 Ω, test report filed | Earth conductor installation and testing (≤ 0.5 Ω per 10 m) | OK NC NA HOLD |
| 1.4 | HOLD POINT: Earth resistance measurement (earthing system cannot be covered/backfilled until test approved) Acceptance: Earth megger test ≤ 5 Ω, test report signed by QC, pit cover installation approved | Earth resistance test result ≤ 5 Ω approval required before pit cover installation | OK NC NA HOLD |
| ACTIVITY_2. Phase 2: Conduit & Cable Tray Installation | |||
| 2.1 | Conduit/cable tray routing layout verification (against design drawings; no clashes with structure/MEP) Acceptance: Route verified on site, no structural/MEP clashes, changes documented if any, approved before installation | Route co-ordination and approval by Site Engineer | OK NC NA HOLD |
| 2.2 | Conduit/tray installation and support verification (spacing ≤ 1.5 m, bolts tight, no movement) Acceptance: Support spacing verified ≤ 1.5 m, bolts torque-checked, no deflection/sagging, QC sign-off obtained | Visual inspection and QC approval of installed conduit/tray | OK NC NA HOLD |
| 2.3 | Unused conduit/tray entry sealing (to prevent pest/moisture ingress before cable laying) Acceptance: Blanking plugs or caps fitted, visual confirmation, ready for cable laying | All unused entries sealed before cable installation | OK NC NA HOLD |
| ACTIVITY_3. Phase 3: Cable Laying & Installation | |||
| 3.1 | Cable laying method statement review and approval before work starts (routing, spacing, bend radius, protection) Acceptance: Method statement submitted, reviewed, approved, and signed before cable laying commences | Method statement approved by QC/Site Engineer | OK NC NA HOLD |
| 3.2 | WITNESS POINT: Cable laying in conduit/tray (QC to witness cable handling, bend radius, arrangement, no damage) Acceptance: QC witnesses cable laid per method statement, bend radius ≥ 6D, arrangement correct, no damage observed | QC inspection and witness of cable laying process | OK NC NA HOLD |
| 3.3 | Cable color-coding and labeling applied at all connection points (phase/neutral/earth identification) Acceptance: Color coding applied (brown/red/black/green), labels affixed, matching circuit schedule, QC verified | All cables color-coded and labeled per IS 732 | OK NC NA HOLD |
| 3.4 | Excess cable coiling and securing (radius ≥ 6D, secured with non-corrosive ties every 0.5 m) Acceptance: Excess cable coiled with radius ≥ 6D, secured neatly, no kinks or damage, site-clean appearance maintained | Proper cable storage at outlets/DB | OK NC NA HOLD |