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Power Systems Technical Articles

Our experts continuously work on power systems problems, and we share solutions with Practical Reference Articles.

The main topics are earthing system modeling, power cable ratings, HV/LV electrical design, protective device coordination, and arc flash studies. We cover IEC and IEEE standards.

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
ELEK vs Competitors
Electrical Software
Large electrical cables in an orange conduit are laid in a trench near a solar panel installation on a sunny day.
7 mins read

Dynamic Cable Rating: Calculating Cable Ampacity Under Cyclic Loads

Dynamic cyclic rating of buried cables under daily load profiles. Worked five-feeder example, IEC 60853 basis, soil dry-out, emergency ratings, and FAQs
Earthing Design Software Screenshot
11 mins read

7 Best Earthing & Grounding Design Software Packages (2026)

Comparison of the best earthing and grounding system design software including ELEK SafeGrid, CDEGS, XGSLab, ETAP and more based on technical features and compares price.
A worker in a high-visibility jacket and helmet stands with a tablet at an outdoor electrical substation surrounded by power lines and equipment.
5 mins read

Understanding the Conversion Factor in IEC 60479-1: Body Impedance and Touch Voltage Safety Limits

The IEC 60479-1 Conversion Factor sets how body impedance translates into permissible touch voltage. See how 70%, 80% and 90% values change your design.
Power cables installed, direct buried, representing the installation cases covered by AS/NZS 3008.1.1:2025
10 mins read

New 2025 Cable Sizing Standard AS/NZS 3008.1.1 — What Engineers and Electricians Need to Know

Seven major changes in AS/NZS 3008.1.1:2025 for cable sizing — new DC tables, multi-row correction factors, 110 °C aluminium ratings, voltage rise, and short-circuit limits.
Digital illustration of an electrical substation with blue and orange energy flows, representing the transfer and distribution of electrical power in a grid network.
6 mins read

CDEGS vs. ELEK SafeGrid Software

Compare CDEGS vs ELEK SafeGrid for earthing design software. See differences in features, soil modelling, safety calculations, accuracy, and usability for substation earthing design.
Screenshot of high voltage cable rating software
7 mins read

CYMCAP vs. ELEK Cable HV Software

The features of ELEK Cable HV software and CYMCAP software are compared in detail.
NEC wire sizing calculation example showing 4/0 AWG conductor selection with ampacity, voltage drop, and NFPA 70 electrical code reference
14 mins read

How to Size Wires Using NEC (With Calculation Examples)

Learn how to size wires using NEC (NFPA 70) with step-by-step calculation examples, including ampacity, voltage drop, OCPD, and EGC sizing.
Diagram showing a 400V switchboard supplying power through cables with resistance and reactance to three motors and a control panel, illustrating supply and load voltage and power factor.
5 mins read

Advanced Voltage Drop Calculations

Advanced voltage drop calculations for electrical cables. Learn how power factor, cable temperature, impedance, motors, and installation conditions affect voltage drop.
Grounding grid beneath a large solar farm showing soil resistivity variation across the site
4 mins read

How Soil Resistivity Variation Affects Grounding Grid Impedance and Touch Voltage

Learn how soil resistivity variation affects grounding grid impedance and touch voltage on large solar farms and substations.
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