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Engineer's Toolkit

Practical tools for theengineers we train

A companion workspace for our CAD, BIM and technical students ā€” sizing calculators, formula sheets, drawing templates and curated links, all in one place so you can practice with the same tools used on real projects.

Calculators
Cable & load sizing
Resource Library
Standards & templates
External Links
Curated & trusted
Engineer working across Revit BIM, AutoCAD electrical schematics, ETAP short-circuit analysis and Excel load schedule and cable sizing sheets
Electrical Tools

Engineering Calculators

Preliminary sizing tools for practicing the same calculations covered in our technical courses.

Conductor Sizing

Four independent engineering sizing tools ā€” HT cables, LV cables, busducts and earthing conductors ā€” each performing real IEC/IS-aligned calculations rather than a rough estimate.

Design Inputs
Results
Demand Load
80.00 kW
Design Current
123.66 A
Final Recommended Cable Size
25 mmĀ²
Current Carrying Capacity
127.00 A
Utilization
97.4%
Voltage Drop
2.18%
Recommended Breaker
125 A
Protective Device Compatibility
Ib ā‰¤ In ā‰¤ Iz OK
Short Circuit Check
98.9 mmĀ² req.
FAIL
Cable utilization at 97% ā€” limited headroom.
Selected conductor cross-section is below the adiabatic short-circuit withstand requirement.
Calculation Formulas & Methodology
  1. Demand Load (kW) = Connected Load Ɨ Diversity Factor
  2. Design Current (A) = (Demand Load Ɨ 1000) Ć· (V Ɨ PF) for 1Ļ†, or Ć· (āˆš3 Ɨ V Ɨ PF) for 3Ļ†
  3. Current Carrying Capacity Iz (A) = Base Ampacity Ɨ Ambient Factor Ɨ Grouping Factor Ɨ Material Factor Ɨ Installation Factor Ɨ Formation Factor
  4. Final Recommended Cable Size = smallest standard size where Iz ā‰„ Design Current
  5. Voltage Drop (%) = [k Ɨ I Ɨ L Ɨ (RĀ·cosĻ† + XĀ·sinĻ†)] Ć· V Ɨ 100 (k = 2 for 1Ļ†, āˆš3 for 3Ļ†)
  6. Short-Circuit Minimum Cross-Section (mmĀ²) = (Fault Current Ɨ āˆšFault Duration) Ć· K (IEC 60364-5-54)
  7. Protective Device Compatibility: Ib (design current) ā‰¤ In (breaker rating) ā‰¤ Iz (cable capacity)
Indicative preliminary sizing tool aligned in principle with IEC 60364-5-52/5-54 and IS 732/IS 1255. Verify against manufacturer cable data sheets and the applicable local wiring regulation before final design.
Values shown are indicative, simplified reference figures for preliminary/learning purposes and are aligned in principle with the IEC 60364, IEC 60076, IEC 62040, ISO 8528, IEC 60909, IEEE 80, IEEE 141, EN 12464-1 and TIA-942 standards. Always verify against a manufacturer's datasheet and the applicable standard before using these figures on a real project.
Electrical Simulation

Interactive Physics Simulators

Beyond the calculators ā€” visual, interactive simulations for building intuition around the electrical fundamentals behind the numbers.

Generator Physics Simulator

A synchronous generator rotor spins inside a fixed stator. Change the pole count and grid frequency to see synchronous speed respond in real time (Ns = 120f / P), watch magnetic flux sweep past each phase winding, and read the resulting Faraday's-Law EMF and three-phase sine waves as they're generated.

Synchronous speed (Ns = 120f / P)Faraday's Law (E = āˆ’N dĪ¦/dt)Three-phase EMF generation
Launch Simulator

Electron Drift vs. Field Speed

Close the switch and a lamp meters away lights up almost instantly ā€” because the electric field propagates through the conductor at a large fraction of the speed of light. But the electrons that actually carry the current only drift at a snail's pace. Adjust the current and wire size and compare both speeds directly.

Electric field propagation speedElectron drift velocity (vd = I / nAq)Energy flow (Poynting vector)
Launch Simulator
Opens in a new tab. Best viewed on a laptop or desktop screen.
Standards Reference

Electrical & Data Center Standards

The standards our calculators and coursework are aligned with, organized by topic ā€” a quick reference for what to cite and where to look things up.

General Electrical Installation

IEC 60364
Low-Voltage Electrical Installations
Design, verification and safety of LV wiring installations
NFPA 70 (NEC)
National Electrical Code
US wiring and installation code
IEC 61439
LV Switchgear and Controlgear Assemblies
Design and testing of panels, SMDBs and switchboards
IEC 60947
Low-Voltage Switchgear and Controlgear
Breakers, contactors and switching devices

Protection, Short-Circuit & Safety

IEC 60909
Short-Circuit Currents in Three-Phase AC Systems
Fault level calculation methodology
IEEE 242
Protection and Coordination of Industrial Power Systems (Buff Book)
Protective device coordination
IEEE 1584
Guide for Arc-Flash Hazard Calculations
Incident energy and PPE category determination
NFPA 70E
Electrical Safety in the Workplace
Safe work practices around energized equipment

Transformers, Generators & UPS

IEC 60076
Power Transformers
Ratings, testing and impedance
IEEE C57 series
Transformers
US transformer standards
ISO 8528
Reciprocating IC Engine Driven Generating Sets
Diesel generator ratings and performance
IEC 60034
Rotating Electrical Machines
Motors and alternators
IEC 62040
Uninterruptible Power Systems (UPS)
UPS performance and testing requirements

Cables & Conductors

IEC 60228
Conductors of Insulated Cables
Conductor construction and sizing
IEC 60502
Power Cables with Extruded Insulation
PVC/XLPE cable ratings 1kVā€“30kV

Earthing & Lightning Protection

IEC 60364-5-54
Earthing Arrangements and Protective Conductors
Grounding system design
IEEE 80
Guide for Safety in AC Substation Grounding
Substation earth grid design
IEC 62305
Protection Against Lightning
Lightning risk assessment and protection systems

Data Center Specific

TIA-942
Telecommunications Infrastructure Standard for Data Centers
Data center tiering and infrastructure design
ANSI/BICSI 002
Data Center Design and Implementation Best Practices
Comprehensive data center design guide
Uptime Institute Tier Standard
Tier Classification (Tier Iā€“IV)
Data center topology and reliability classification
EN 50600
Data Centre Facilities and Infrastructures
European data center facility standard
NFPA 75 / 76
Fire Protection for IT Equipment / Telecom Facilities
Fire protection for critical facilities
ISO/IEC 30134
Data Centre Key Performance Indicators
PUE and other efficiency metrics
ASHRAE TC9.9
Thermal Guidelines for Data Processing Environments
Environmental design guidelines
Resource Library

Reference Documents & Templates

Formula sheets, standards summaries and drawing templates that support what you learn in class. New items are added here regularly.

Standards & Formula Sheets

Quick-reference formula sheets and standard summaries used across our CAD, BIM and technical courses.

Available
Electrical Power System & Lighting Design Reference

An 18-section reference covering power distribution, load calculations, cable sizing, voltage drop, short-circuit, grounding, lightning protection, motor starting, transformers, harmonics, power factor correction, lighting design and more, with worked examples and standards comparisons.

Reference GuideView
Available
Electrical Formula Cheat Sheet

Ohm's Law, power equations, and cable sizing formulas condensed onto a single reference page.

Formula SheetView
Coming Soon
CAD Drafting Standards Guide

Layer naming, line-weight and title-block conventions taught in our Drafting & Design course.

Guide
Coming Soon
BIM Standards Overview

A plain-language walkthrough of common BIM execution plan requirements for student projects.

Guide

Templates & Drawings

Starter templates and drawing files to practice with inside AutoCAD, Revit and related tools.

Coming Soon
AutoCAD Title Block Template

A ready-to-use A1/A3 title block and border, matching the format used in class exercises.

AutoCAD
Coming Soon
Revit MEP Starter Template

A pre-configured Revit template with common families, ready for BIM coursework.

Revit
Coming Soon
Site Survey Checklist

A printable checklist for capturing site measurements before starting a drafting assignment.

Checklist