# Commercial Electrical Toolkit — Complete Sample Project Design

> Complete Sample Project Design (iPhone/iPad app by Yuhsiu Lai.)

- Source: https://appshunter.io/ios/app/commercial-electrical-toolkit/id6767666743 (this page in markdown: same URL + `.md`)
- Developer: [Yuhsiu Lai](https://appshunter.io/developer/433114647)
- Category: Business, Education
- Price: $2.99 (on sale, was $12.99)
- Age rating: 4+
- Requires: iOS 17.0 · 43 MB
- Languages: English
- Released: 2026-05-11
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/commercial-electrical-toolkit/id6767666743/reviews.md

## What is Commercial Electrical Toolkit?

Commercial Electrical Toolkit is a professional reference and project-management tool built for electrical engineers, project managers, and construction teams on commercial distribution projects.
WHAT'S INSIDE
Four Professional NEC Calculators

Voltage Drop — calculates conductor voltage drop per NEC guidelines with pass/fail against the 3% recommendation. Supports copper and aluminum conductors from #14 AWG to 500 kcmil, single-phase and three-phase systems.
Conduit Fill — checks NEC Chapter 9 Table 1 fill limits for EMT conduit (½" through 4") with THHN/THWN-2 wire sizes up to 350 kcmil. Supports up to three wire sets in one raceway.
Demand Load — estimates service entrance amperage using NEC Article 220 demand factors for lighting, receptacles, HVAC, motors, and miscellaneous loads. Automatically identifies the next standard ampere rating per NEC 230.79.
Fault Current — calculates available short-circuit current at the transformer secondary using IEEE C37.010 inputs. Includes asymmetrical peak current factor, X/R ratio, and PPE category guidance.

42-Drawing Engineering Reference Library
Full-resolution reference drawings spanning all 17 phases of a commercial electrical distribution project — from utility coordination through project closeout. Drawings are searchable, filterable by phase, and open in a full-screen zoomable viewer.
17-Phase Workflow Tracker
Track a complete commercial electrical distribution project from utility coordination through project closeout. Each phase contains detailed steps with professional descriptions, deliverables, and completion tracking backed by SwiftData persistent storage.
Deliverables & Document Manager
Monitor drawing submittals, calculation packages, equipment schedules, and closeout documents with real-time completion status. Color-coded indicators show at a glance what is pending, in review, or approved.
Arc Flash & Fault Current Guidance
Estimate available short-circuit current at the transformer secondary and evaluate PPE requirements using IEEE 1584 and IEEE C37.010 inputs. All results include a clear disclaimer directing users to a licensed engineer for a full arc flash study per NFPA 70E.
Who It's For

Electrical engineers managing commercial distribution design packages
Project engineers and project managers on construction sites
Electrical contractors coordinating multi-phase commercial projects
Apprentices and students preparing for professional practice

All NEC formulas reference the National Electrical Code. All fault current calculations are informational estimates; a licensed professional engineer should perform the full short-circuit and arc flash study for any real installation.


## Version history (last 2 releases)

### 2.0 — 2026-05-19

Version 2.0 is a major update:

Four new professional NEC calculators: Voltage Drop, Conduit Fill, Demand Load, and Fault Current
Arc flash and short-circuit current estimation with IEEE C37.010 inputs
New Calculators tab accessible directly from the main navigation
42-drawing engineering reference library with full-screen zoom viewer
What's New onboarding screen highlights features on first launch
Performance and stability improvements throughout

### 1.0 — 2026-05-11

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

## Related topics

[eaton fc2](https://appshunter.io/ios/topics/eaton-fc2)

---

*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 2026-06-25.*