IEC Cable Verification Reference Sheet
Original decision map, core equations, worked example and design-release checklist for a traceable cable verification.
Open free reference →Browse by topic: Cable design · Load planning · Power quality · Short circuit · Protection
Engineering knowledge base
Electrical Engineering Articles
Formula-driven explanations for cable sizing, load planning, demand and diversity, voltage drop, short-circuit current, protection and practical electrical design.
IEC Cable Design & Verification Workflow
Enter a real circuit and solve installation, ampacity, protection, voltage drop, short-circuit withstand and economic sizing step by step.
Open interactive workflow →Electrical Load Schedule: Connected Load vs Demand Load
Separate installed connected load from the maximum demand used for feeder, transformer and generator planning.
Read article →Demand Factor vs Diversity Factor
Use demand, coincidence and diversity factors without mixing definitions or discounting the same non-coincidence twice.
Read article →Power Factor Correction Worked Example
Calculate capacitor-bank kVAr and compare kVA and line current before and after correction.
Read article →Active vs Passive Harmonic Filters
Compare mitigation architectures and work through a compensation-current screening example.
Read article →Cable Sizing vs Ampacity: What Are You Actually Checking?
Separate continuous-current ampacity from protection, voltage-drop and short-circuit sizing constraints.
Read article →IEC Cable Installation Methods A1–F Explained
Understand why conduit, wall, tray, free-air and buried arrangements change the thermal reference rating.
Read article →Cable Derating: Temperature, Grouping and Installation Factors
Apply correction factors without double counting and see how a comfortable reference rating can become marginal.
Read article →Cable Short-Circuit Thermal Withstand: I²t ≤ k²S²
Calculate the thermal minimum conductor area and distinguish clearing I²t from breaking capacity.
Read article →Transformer Short-Circuit Current: Worked Example
Calculate LV terminal fault current from transformer kVA, voltage and impedance, then include a finite upstream source.
Read article →Protection Coordination and TCC Explained
Read time-current curves without confusing curve separation with total selectivity, cascading or SCCR.
Read article →Lumen Method Lighting Calculation
Estimate preliminary fixture quantity from target lux, room area, luminaire lumens, utilization and maintenance factors.
Read article →Generator Sizing: Running kVA vs Motor Starting
Compare continuous demand with the motor-starting case and understand where manufacturer transient data takes over.
Read article →Three-Phase Voltage Drop: Formula, Example and Design Limits
Why √3 appears, how conductor resistance affects the result, and where simplified formulas stop being sufficient.
Read article →Short-Circuit Current, SCCR and Interrupting Rating: What Changes?
Separate available fault current from equipment and protective-device ratings.
Read article →I²t Let-Through Energy Explained for Protection Coordination
Understand thermal stress, current limitation and downstream withstand checks.
Read article →How to use the engineering guides
The Knowledge Hub is designed to work beside the calculators rather than replace them. Start with an article when you need the reasoning behind a formula, the meaning of a rating, or the limits of a simplified method. Then open the related calculator and apply the actual project values so the assumptions stay visible during the check.
For cable work, start with cable sizing vs ampacity, then use the IEC installation-method, derating, voltage-drop and short-circuit thermal-withstand guides beside the IEC cable sizing calculator. For protection studies, use the short-circuit and SCCR guide and the I²t guide before reviewing the protection chain in FaultChain. The final design should still be verified against the adopted standard, manufacturer data and project specification.