| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. MTC IDENTIFICATION AND AUTHENTICITY | |||
| A1 | Verify MTC on manufacturer letterhead with unique certificate number and authorized signatory Acceptance: Letterhead, cert no., date, signatory, seal all present | Cl. 18 — Certification | OK NC NA HOLD |
| A2 | Verify BIS ISI mark and CM/L licence number on drum label and MTC Acceptance: ISI mark and CM/L number valid; licence currency verified on BIS portal | Cl. 18 — BIS marking | OK NC NA HOLD |
| A3 | Verify drum/coil marking: manufacturer, IS number, cores × size, voltage, length, batch Acceptance: All statutory details printed on drum tag and embossed/printed on outer sheath | Cl. 17 — Marking | OK NC NA HOLD |
| B. CONDUCTOR AND DIMENSIONAL VERIFICATION | |||
| B1 | Verify conductor material (copper / aluminium), class (1/2/5), and construction per IS 8130 Acceptance: Annealed plain copper (Class 1/2/5) or Al; stranding and nominal area conform to IS 8130 | Cl. 5 — Conductor | OK NC NA HOLD |
| B2 | Verify conductor resistance (DCR) at 20°C on MTC against IS 8130 Table Acceptance: E.g. 1.5 sqmm Cu Cl 1 ≤ 12.1 Ω/km; 2.5 ≤ 7.41; 4.0 ≤ 4.61 Ω/km; reported values within limit | Table 1 — DCR | OK NC NA HOLD |
| B3 | Verify insulation thickness, sheath thickness, overall diameter per IS table on MTC Acceptance: Insulation and sheath thickness meet IS minimum; mean value and minimum at any point checked | Table 2 — Dimensions | OK NC NA HOLD |
| C. ELECTRICAL AND MECHANICAL PROPERTIES | |||
| C1 | Verify high-voltage (AC withstand) test result reported on MTC Acceptance: 3 kV AC for 5 min (1100 V grade) withstood without breakdown per IS 10810 Part 45 | Cl. 14 — HV test | OK NC NA HOLD |
| C2 | Verify insulation resistance (IR) at 20°C and 70°C/90°C on MTC Acceptance: IR per IS 10810 Part 43 meets minimum volume resistivity; reported >> minimum | Cl. 14 — IR | OK NC NA HOLD |
| C3 | Verify tensile strength and elongation of insulation and sheath before/after ageing Acceptance: PVC: tensile ≥ 12.5 MPa, elongation ≥ 150%; variation after ageing ≤ 25%; XLPE per IS 7098 | Table 3 — Mechanical | OK NC NA HOLD |
| C4 | Verify flammability / oxygen index / smoke density (for FR/FRLS/LSOH grades) Acceptance: FRLS: oxygen index ≥ 29%; temperature index ≥ 250°C; smoke density ≤ 60%; acid gas ≤ 20% | Cl. 14 — Fire | OK NC NA HOLD |
| C5 | For XLPE — verify hot set test, water absorption, shrinkage on MTC Acceptance: Hot set: elongation ≤ 175%, permanent set ≤ 15% at 200°C; within IS 7098 limits | Table 2 — XLPE | OK NC NA HOLD |