Validation register

Each line compares a calculator's result with a reference obtained independently of the site's code: a value printed in a standard's table, a worked example published in the standard itself, or a hand calculation from the standard's formula done separately. The acceptance tolerance is fixed before the test. The whole register is run automatically before every release, and the results below are produced by this build.

38 / 38cases within tolerance

9against printed table values

13against the standards' own worked examples

16against independent hand calculations

Download the register (CSV)Build edaa4a2 · 2026-11-08. Prepared by Ajmal Jamseeth (AJapps). Not yet independently reviewed.

Cables

ID	Tool / quantity	Inputs	Reference	Expected	Actual	Dev. / tol.	Result
CAB-01	Cable Sizing & Voltage Drop Current rating Itab, Cu/PVC, method C, 25 mm², 3 loaded conductors	Cu, PVC 70 °C, method C, 25 mm², 3 loaded	IEC 60364-5-52:2009 Table B.52.4, column C Standard table	96 A	96.000 A	0.00 % / ±0 %	PASS
CAB-02	Cable Sizing & Voltage Drop Current rating Itab, Cu/PVC, method A1, 2.5 mm²	Cu, PVC 70 °C, method A1, 2.5 mm², 3 loaded	IEC 60364-5-52:2009 Table B.52.4, column A1 Standard table	18 A	18.000 A	0.00 % / ±0 %	PASS
CAB-03	Cable Sizing & Voltage Drop Current rating Itab, Cu/XLPE, method B2, 35 mm²	Cu, XLPE 90 °C, method B2 (multicore in conduit on a wall), 35 mm², 3 loaded	IEC 60364-5-52:2009 Table B.52.5, column B2 Standard table	128 A	128.0 A	0.00 % / ±0 %	PASS
CAB-04	Cable Sizing & Voltage Drop Current rating Itab, Cu/XLPE, method C, 95 mm²	Cu, XLPE 90 °C, method C, 95 mm², 3 loaded	IEC 60364-5-52:2009 Table B.52.5, column C Standard table	278 A	278.0 A	0.00 % / ±0 %	PASS
CAB-05	Cable Sizing & Voltage Drop Current rating Itab, Al/XLPE, method D1 (buried duct), 120 mm²	Al, XLPE 90 °C, method D1, 120 mm², 3 loaded	IEC 60364-5-52:2009 Table B.52.5, column D1 Standard table	174 A	174.0 A	0.00 % / ±0 %	PASS
CAB-06	Cable Sizing & Voltage Drop Ambient temperature factor, PVC in air at 40 °C	PVC 70 °C, air 40 °C	IEC 60364-5-52:2009 Table B.52.14 Standard table	0.87 —	0.8700 —	0.00 % / ±0 %	PASS
CAB-07	Cable Sizing & Voltage Drop Ground temperature factor, XLPE at 30 °C	XLPE 90 °C, ground 30 °C	IEC 60364-5-52:2009 Table B.52.15 Standard table	0.93 —	0.9300 —	0.00 % / ±0 %	PASS
CAB-08	Cable Sizing & Voltage Drop Grouping factor, 6 circuits bunched	6 circuits bunched in air / on a surface	IEC 60364-5-52:2009 Table B.52.17, item 1 Standard table	0.57 —	0.5700 —	0.00 % / ±0 %	PASS
CAB-09	Cable Sizing & Voltage Drop Soil resistivity factor, buried ducts, 1.5 K·m/W	Cables in buried ducts, soil 1.5 K·m/W	IEC 60364-5-52:2009 Table B.52.16 Standard table	1.1 —	1.100 —	0.00 % / ±0 %	PASS
CAB-10	Cable Sizing & Voltage Drop Minimum conductor size for short-circuit withstand	10 kA for 1.0 s, Cu/XLPE	IEC 60364-4-43:2008 434.5.2 (S = √(I²t)/k), k = 143 for Cu/XLPE (Table 43A) Hand calculation from the standard's formula	69.93 mm²	69.930 mm²	0.00 % / ±0.05 %	PASS
CAB-11	Cable Sizing & Voltage Drop Three-phase voltage drop Checks the formula with per-conductor values. Using the single-phase loop value (1.75 mV/A/m) with √3 would double the drop to about 2.6 %.	Cu/PVC 25 mm² (r 0.875 mΩ/m, x 0.058 mΩ/m per conductor at 70 °C), 81.82 A, 50 m, 415 V, cos φ 0.85	ΔU = √3·I·L·(r cos φ + x sin φ), IEC 60364-5-52 Annex G form Hand calculation from the standard's formula	1.322 %	1.322 %	0.01 % / ±0.2 %	PASS
CAB-12	Cable Sizing & Voltage Drop Conductor resistance per conductor at 70 °C, Cu 25 mm² The calculator uses a typical published cable value (0.875 mΩ/m), 0.6 % above the IEC 60228 maximum corrected to 70 °C.	Cu, 25 mm² class 2, 70 °C	IEC 60228:2004 Table 2 (0.727 Ω/km at 20 °C) corrected to 70 °C with α = 0.00393 /K Hand calculation from the standard's formula	0.8699 mΩ/m	0.8750 mΩ/m	0.59 % / ±1 %	PASS

Protection

ID	Tool / quantity	Inputs	Reference	Expected	Actual	Dev. / tol.	Result
PRO-01	IDMT Relay Coordination Operating time, IEC Standard Inverse	Pickup 100 A, TMS 0.10, fault 2000 A (M = 20)	IEC 60255-151:2009 equation (k = 0.14, α = 0.02) Hand calculation from the standard's formula	0.2267 s	0.2267 s	0.02 % / ±0.1 %	PASS
PRO-02	Protection Coordination Suite Operating time, IEC Standard Inverse	TMS 0.30, M = 5	IEC 60255-151:2009 equation (k = 0.14, α = 0.02) Hand calculation from the standard's formula	1.2839 s	1.284 s	0.00 % / ±0.1 %	PASS
PRO-03	Protection Coordination Suite Operating time, IEC Very Inverse	TMS 1.0, M = 10	IEC 60255-151:2009 equation (k = 13.5, α = 1) Hand calculation from the standard's formula	1.5 s	1.500 s	0.00 % / ±0.1 %	PASS
PRO-04	Protection Coordination Suite Operating time, IEC Extremely Inverse	TMS 1.0, M = 10	IEC 60255-151:2009 equation (k = 80, α = 2) Hand calculation from the standard's formula	0.8081 s	0.8081 s	-0.00 % / ±0.1 %	PASS
PRO-05	Protection Coordination Suite Operating time, IEC Long-Time Inverse	TMS 1.0, M = 10	IEC 60255-151:2009 equation (k = 120, α = 1) Hand calculation from the standard's formula	13.333 s	13.333 s	0.00 % / ±0.1 %	PASS
PRO-06	Protection Coordination Suite Operating time, IEEE Moderately Inverse	TD 1.0, M = 10	IEEE C37.112-2018 equation (A = 0.0515, B = 0.114, p = 0.02) Hand calculation from the standard's formula	1.2068 s	1.207 s	-0.00 % / ±0.1 %	PASS
PRO-07	Protection Coordination Suite Operating time, IEEE Very Inverse	TD 1.0, M = 10	IEEE C37.112-2018 equation (A = 19.61, B = 0.491, p = 2) Hand calculation from the standard's formula	0.6891 s	0.6891 s	-0.00 % / ±0.1 %	PASS
PRO-08	Protection Coordination Suite Operating time, IEEE Extremely Inverse	TD 1.0, M = 10	IEEE C37.112-2018 equation (A = 28.2, B = 0.1217, p = 2) Hand calculation from the standard's formula	0.4065 s	0.4065 s	0.01 % / ±0.1 %	PASS

Earthing

ID	Tool / quantity	Inputs	Reference	Expected	Actual	Dev. / tol.	Result
EAR-01	Earthing Grid Design Grid resistance Rg (Sverak, Eq. 57)	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	2.78 Ω	2.776 Ω	-0.15 % / ±0.5 %	PASS
EAR-02	Earthing Grid Design Ground potential rise GPR = IG·Rg	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	5304 V	5296.0 V	-0.15 % / ±0.5 %	PASS
EAR-03	Earthing Grid Design Surface-layer derating factor Cs The standard rounds Cs to 0.74; the calculator keeps 0.743.	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	0.74 —	0.7429 —	0.39 % / ±0.5 %	PASS
EAR-04	Earthing Grid Design Tolerable touch voltage, 70 kg The 0.3 % difference comes from the standard rounding Cs to 0.74.	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	838.2 V	840.5 V	0.28 % / ±0.5 %	PASS
EAR-05	Earthing Grid Design Tolerable step voltage, 70 kg The 0.4 % difference comes from the standard rounding Cs to 0.74.	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	2686.6 V	2696.1 V	0.35 % / ±0.5 %	PASS
EAR-06	Earthing Grid Design Spacing factor for mesh voltage Km	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	0.89 —	0.8896 —	-0.05 % / ±0.5 %	PASS
EAR-07	Earthing Grid Design Mesh voltage Em	70 m × 70 m grid, 1540 m conductor, no rods, ρ 400 Ω·m, surface 2500 Ω·m × 0.102 m, h 0.5 m, d 0.01 m, D 7 m, tf 0.5 s, IG 1908 A, 70 kg	IEEE Std 80-2013, Annex B, Example 1 (square grid without rods) Standard worked example	1002.1 V	1001.6 V	-0.05 % / ±0.5 %	PASS
EAR-08	Ground Resistance (single rod) Rod electrode resistance	ρ 100 Ω·m, rod 3 m long, 16 mm diameter	BS 7430:2011+A1:2015 9.5.3, R = ρ/(2πL)·(ln(8L/d) − 1) Hand calculation from the standard's formula	33.49 Ω	33.493 Ω	0.01 % / ±0.05 %	PASS
EAR-09	Earthing Grid Design Plate electrode resistance	ρ 100 Ω·m, plate 1 m × 1 m	BS 7430:2011+A1:2015 9.5.2, R = (ρ/4)·√(π/A) Hand calculation from the standard's formula	44.31 Ω	44.311 Ω	0.00 % / ±0.05 %	PASS
EAR-10	Earthing Grid Design Strip electrode resistance	ρ 100 Ω·m, strip 10 m × 25 mm, buried 0.6 m	BS 7430:2011+A1:2015 9.5.5, R = ρ/(2πL)·ln(L²/(1.36·h·w)) Hand calculation from the standard's formula	13.52 Ω	13.524 Ω	0.03 % / ±0.05 %	PASS
EAR-11	Ground Ring Resistance Ring electrode resistance	ρ 100 Ω·m, ring 10 m diameter, 10 mm conductor, buried 0.6 m	IEEE Std 142-2007 Table 4-5 (Dwight ring formula) Hand calculation from the standard's formula	6.329 Ω	6.329 Ω	0.01 % / ±0.05 %	PASS
EAR-12	Earthing Grid Design Earthing conductor k, copper, bolted joints	Copper, θi 30 °C, θf 250 °C	BS 7430:2011+A1:2015 9.7 and Table 7, k = 226·√ln((θf + 234.5)/(θi + 234.5)) Hand calculation from the standard's formula	175.8 A/mm² (1 s)	175.8 A/mm² (1 s)	0.02 % / ±0.05 %	PASS

Arc flash

ID	Tool / quantity	Inputs	Reference	Expected	Actual	Dev. / tol.	Result
AF-01	Arc Flash Arcing current	4.16 kV, VCB, Ibf 15 kA, gap 104 mm, working distance 914.4 mm, enclosure 762 × 1143 × 762 mm, T 197 ms	IEEE Std 1584-2018 Annex D.1 Standard worked example	12.979 kA	12.979 kA	0.00 % / ±0.1 %	PASS
AF-02	Arc Flash Incident energy	4.16 kV, VCB, Ibf 15 kA, gap 104 mm, working distance 914.4 mm, enclosure 762 × 1143 × 762 mm, T 197 ms	IEEE Std 1584-2018 Annex D.1 Standard worked example	12.152 J/cm²	12.152 J/cm²	-0.00 % / ±0.1 %	PASS
AF-03	Arc Flash Arc-flash boundary	4.16 kV, VCB, Ibf 15 kA, gap 104 mm, working distance 914.4 mm, enclosure 762 × 1143 × 762 mm, T 197 ms	IEEE Std 1584-2018 Annex D.1 Standard worked example	1606 mm	1606.0 mm	0.00 % / ±0.2 %	PASS
AF-04	Arc Flash Arcing current	0.48 kV, VCB, Ibf 45 kA, gap 32 mm, working distance 609.6 mm, enclosure 610 × 610 × 254 mm, T 61.3 ms	IEEE Std 1584-2018 Annex D.2 Standard worked example	28.793 kA	28.793 kA	0.00 % / ±0.1 %	PASS
AF-05	Arc Flash Incident energy	0.48 kV, VCB, Ibf 45 kA, gap 32 mm, working distance 609.6 mm, enclosure 610 × 610 × 254 mm, T 61.3 ms	IEEE Std 1584-2018 Annex D.2 Standard worked example	11.585 J/cm²	11.585 J/cm²	-0.00 % / ±0.1 %	PASS
AF-06	Arc Flash Arc-flash boundary	0.48 kV, VCB, Ibf 45 kA, gap 32 mm, working distance 609.6 mm, enclosure 610 × 610 × 254 mm, T 61.3 ms	IEEE Std 1584-2018 Annex D.2 Standard worked example	1029 mm	1028.7 mm	-0.03 % / ±0.2 %	PASS

How to read this register

Standard table: the calculator's value must equal the printed value exactly (tolerance 0 %). Only sample entries are listed here; during the November 2026 review every entry of Tables B.52.4 and B.52.5 used by the cable calculator (methods A1, B1, B2, C and D1, copper and aluminium) was compared with the standard.
Standard worked example: the standard's own example is re-run with its inputs. Small differences come from rounding in the published example, explained in the note where they occur.
Hand calculation: the standard's formula evaluated separately from the site's code. This confirms the formula is implemented correctly; it does not test the data a user enters.
Passing these cases does not certify a design. See Verification & changes for what the tests do and do not prove, known issues and the correction log.