One of the most frequent questions engineers ask before inspecting Cable Insulation Resistance & Polarization Index Calculator is: "Which standard should I cite on the certificate, and where do the pass/fail limits come from?" This reference guide maps IEEE 43 to national regulatory adoptions and provides the complete standard annex tables.
1. National & Regional Standard Equivalence Matrix
| Region / Language | Adopted National Standard & Regulatory Code |
|---|---|
| International / UK (EN) | IEEE 43 |
| Turkey (TR · Türkçe) | IEEE 43-2013 / TS HD 60364-6 Tablo 6.1 |
| Germany / DACH (DE · Deutsch) | DIN VDE 0100-600 / IEEE 43-2013 |
| France (FR · Français) | NF C 15-100 Titre 6 / IEEE 43-2013 |
| Spain (ES · Español) | REBT ITC-BT-19 / IEEE 43-2013 |
| Italy (IT · Italiano) | CEI 64-8 Parte 6 / IEEE 43-2013 |
| Gulf / Middle East (AR · العربية) | IEEE 43 / SASO / DEWA / ADDC |
2. Normative Acceptance Criteria & Mathematical Basis
PI = R10min / R1min evaluated to IEEE 43-2013 Table 3 (Class A minimum 1.5; Class B, F, H minimum 2.0; any class below 1.0 is a critical degradation alert). DAR = R60s / R30s follows industry field test convention (NETA MTS / Megger guidelines).
R_40C: R_40C = R_T x 0.5^((40 - T) / 10) — Halving rule temperature correction of 1-minute IR reading from winding temperature T (degC) to 40 degC (IEEE 43 §6.3).
PI & DAR: PI = R_10min / R_1min | DAR = R_60s / R_30s — Dimensionless dielectric absorption ratios; IEEE 43 §9.2 exempts PI when R_40C >= 5000 MOhm.
3. Official Standard Reference Tables
IEEE Std 43-2013 Table 1 & Table 2: DC Test Voltage & Minimum IR at 40 degC (IEEE Std 43-2013 §5.4 & §12.3)
| Winding Rated Voltage (L-L) | Recommended DC Test Voltage | Min IR at 40 degC (R_min) | Min PI (Class B/F/H) |
|---|---|---|---|
| < 1000 V (LV Motors / Switchgear) | 500 V DC | IR_min = 5 MOhm | PI >= 2.0 (exempt if R_40C >= 5000 MOhm) |
| 1000 - 2500 V | 500 - 1000 V DC | IR_min = 100 MOhm (form-wound) | PI >= 2.0 |
| 2501 - 5000 V | 1000 - 2500 V DC | IR_min = 100 MOhm | PI >= 2.0 |
| 5001 - 12000 V (6.6 kV / 11 kV) | 2500 - 5000 V DC | IR_min = 100 MOhm | PI >= 2.0 |
| > 12000 V (13.8 kV / 34.5 kV) | 5000 - 10000 V DC | IR_min = 100 MOhm | PI >= 2.0 |