# Electrical Systems Visual Lab — NEC Code Simulations & Tools

> NEC Code Simulations & Tools (iPhone/iPad app by Yuhsiu Lai.)

- Source: https://appshunter.io/ios/app/electrical-systems-visual-lab/id6765833174 (this page in markdown: same URL + `.md`)
- Developer: [Yuhsiu Lai](https://appshunter.io/developer/433114647)
- Category: Education, Reference
- Price: $1.99 (on sale, was $7.99)
- Age rating: 4+
- Requires: iOS 17.0 · 131 MB
- Languages: American English
- Released: 2026-05-04
- Data updated: 2026-09-12
- User reviews in markdown: https://appshunter.io/ios/app/electrical-systems-visual-lab/id6765833174/reviews.md

## What is Electrical Systems Visual Lab?

Master electrical systems the visual way — with three new engineering tools, eight animated simulations, 76 illustrated diagrams, NEC code reference, and structured curriculum. Built for electricians, apprentices, and electrical engineers.
NEW IN VERSION 2.0 — ENGINEERING TOOLS TAB
Three practical, field-ready tools exclusive to this app:

Conduit Fill Calculator — Select conduit type (EMT, IMC, RMC, PVC Sch 40/80) and trade size, add conductors by AWG, and get live NEC Chapter 9 fill compliance — green for pass, red for violation. Wire areas pulled directly from NEC Table 5.
NEC Electrical Inspection Checklist — 52 NEC code items across six inspection categories: Service Entrance & Metering, Panelboard & Overcurrent Devices, Branch Circuits & Outlets, GFCI & AFCI Protection, Grounding & Bonding (Article 250), and Special Systems. Tap to check items, track your pass rate, and reset for the next job.
Wire Ampacity Guide — Interactive NEC 310.16 reference for copper and aluminum conductors from 14 AWG through 500 kcmil. Apply ambient temperature correction and conduit fill derating — adjusted ampacity updates instantly. Tap any row to highlight it for quick comparison.

EIGHT ANIMATED LAB SIMULATIONS
Watch electricity behave in real time through canvas-rendered interactive simulations: Power Grid, 3-Phase Phasors, Voltage Drop, Ground Fault/GFCI, Transformer, Motor Control (DOL + VFD), Arc Flash, and Panel Load Calculator.
76 ILLUSTRATED DIAGRAMS
Professional electrical diagrams across 10 categories — Fundamentals, Power Systems, Service Entrance, Distribution, Branch Circuits, Conductors, Grounding, Motors, Floor Plans, and Special Systems. Full-screen slideshow with pinch-to-zoom. Optimized for iPad with side-panel layout.
NEC CODE REFERENCE
Formulas, NEC Codes, Wire & Conduit tables, Equipment specs, Controls & PLC, Standards, and Glossary — organized and searchable, no internet required.
STRUCTURED CURRICULUM
Step-by-step lessons across Beginner, Intermediate, and Advanced modules with explanations, code examples, and quiz questions.
WHO IT'S FOR
Electrical apprentices · Journeymen & master electricians · Electrical engineering students · Electrical inspectors · Contractors · Anyone studying for the journeyman or master electrician licensing exam

## Chart rankings

- #187 in Top Paid · Education (US App Store)


## Version history (last 2 releases)

### 2.0 — 2026-05-19

Version 2.0 adds a dedicated Engineering Tools tab with three new features: (1) Conduit Fill Calculator — select conduit type and trade size, add conductors by AWG, and get live NEC Chapter 9 fill compliance; (2) NEC Electrical Inspection Checklist — 52 code items across six inspection categories with a progress tracker; (3) Wire Ampacity Guide — interactive NEC 310.16 table with ambient temperature correction and conduit fill derating for copper and aluminum. The app also displays a What's New screen automatically on first launch. All existing simulations, illustrations, curriculum, and reference content remain unchanged.

### 1.0 — 2026-05-04

No release notes.

## More apps by Yuhsiu Lai

- [Availability and Reliability](https://appshunter.io/ios/app/availability-and-reliability/id435033141)
- [Battery Capacity Calculator](https://appshunter.io/ios/app/battery-capacity-calculator/id445176473)
- [48VDC Power System](https://appshunter.io/ios/app/48vdc-power-system/id449477913)
- [NEC Electrical Code Tools](https://appshunter.io/ios/app/nec-electrical-code-tools/id469334093)
- [Engineer's Toolset](https://appshunter.io/ios/app/engineers-toolset/id478486737)
- [Battery Current Simulator](https://appshunter.io/ios/app/battery-current-simulator/id488430945)

All apps by Yuhsiu Lai: https://appshunter.io/developer/433114647

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-12.*