| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. TEST PROCEDURE & EQUIPMENT | |||
| A1 | Continuity test is performed using multimeter (resistance mode) or dedicated continuity tester; equipment is calibrated Acceptance: Multimeter set to resistance (Ω) mode, zero-ohm check performed before use, calibration within 12 months | Cl. 11.1.1 — Test equipment | OK NC NA HOLD |
| A2 | Circuit is isolated (main switch OFF) and all load equipment disconnected before continuity testing Acceptance: Main switch OFF, MCBs in OFF position, all load equipment isolated, isolation confirmed by site engineer | Cl. 11.1.2 — Circuit isolation | OK NC NA HOLD |
| A3 | Phase-to-Earth loop impedance can be measured using loop impedance tester if available (advanced method) Acceptance: Loop impedance tester connected at DB or outlet, reading in mΩ, recorded with test date/time | Cl. 11.1.3 — Loop impedance test equipment | OK NC NA HOLD |
| B. CONDUCTOR CONTINUITY TESTING | |||
| B1 | Phase conductor continuity tested from supply point to furthest outlet; resistance ≤ 0.1 Ω per 10 m for min. 1.5 mm² cable Acceptance: Phase continuity ≤ 0.1 Ω per 10 m section (for 1.5-2.5 mm²), lower resistance for larger cables acceptable | Cl. 11.2.1 — Phase continuity | OK NC NA HOLD |
| B2 | Neutral conductor continuity tested from supply point to furthest outlet; resistance ≤ 0.1 Ω per 10 m Acceptance: Neutral continuity ≤ 0.1 Ω per 10 m section, same sizing as phase, no loose connections | Cl. 11.2.2 — Neutral continuity | OK NC NA HOLD |
| B3 | Earth conductor continuity tested from supply earth point to furthest outlet; resistance ≤ 0.05 Ω per 10 m Acceptance: Earth continuity ≤ 0.05 Ω per 10 m section, earth conductor same/next size down from phase, minimum 2.5 mm² | Cl. 11.2.3 — Earth continuity | OK NC NA HOLD |
| B4 | If continuity reading shows high resistance (>0.1 Ω per 10 m), connection point is identified and tightened Acceptance: If high resistance: test repeated at intermediate points to locate loose connection, corrected and re-tested | Cl. 11.2.4 — High resistance remediation | OK NC NA HOLD |
| C. EARTH LOOP IMPEDANCE TESTING | |||
| C1 | Earth loop impedance (Zs) measured from DB to furthest socket outlet; typical value ≤ 1.5 Ω for residential circuits Acceptance: Loop impedance Zs ≤ 1.5 Ω for 16A circuits, ≤ 2.0 Ω for 20A circuits, measured at outlet | Cl. 11.3.1 — Loop impedance limit | OK NC NA HOLD |
| C2 | Loop impedance calculation: Zs = (Phase resistance + Earth return resistance) + cable resistance per length Acceptance: Loop impedance calculated or measured, documented with formula/method used, value recorded in report | Cl. 11.3.2 — Loop impedance calculation | OK NC NA HOLD |
| C3 | If loop impedance exceeds limit, earth conductor size is increased or cable route is optimized (shorter run) Acceptance: If Zs > limit: earth conductor increased to next size (min. 4 mm²), route shortened if possible, re-tested | Cl. 11.3.3 — Impedance improvement | OK NC NA HOLD |