---
title: "Master Electrician License Ex - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "This app is the working electrician's toolkit, rebuilt around eight live calculators, a searchable NEC 2023 code library, a practice quiz with article-level citations, and a personal workbench for sav"
---

# Master Electrician License Ex — United States
> NEC 2023 Calcs, Code, Practice

![Master Electrician License Ex App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/52/c3/8a/52c38ab7-2716-1423-408b-7cfb67dd04ae/AppIcon-1x_U007epad-0-1-85-220-0.png/434x0w.png)

**Developer:** [Yuhsiu Lai](https://apptail.io/developer/yuhsiu-lai-llG)
**Category:** Education
**Rating:** N/A (0 ratings)
**Price:** $9.99
**Bundle ID:** com.peexamprep.masterelectrician
**Store:** Apple App Store
**Country:** United States
**Version:** 2.0 (released 2026-05-15)
**Original Release:** 2026-04-22
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6763056723)
**AppTail Page:** [https://apptail.io/app/master-electrician-license-ex-tkwz/united-states](https://apptail.io/app/master-electrician-license-ex-tkwz/united-states)

## Master Electrician License Ex Description
This app is the working electrician's toolkit, rebuilt around eight live calculators, a searchable NEC 2023 code library, a practice quiz with article-level citations, and a personal workbench for saved calculations, bookmarked articles, and field notes.

LIVE NEC CALCULATORS
- Voltage Drop — 1φ and 3φ, copper or aluminum, full conductor table, 3% / 5% targets
- Conduit Fill — mix sizes in EMT, RMC, IMC, PVC-40 or PVC-80; verifies Chapter 9 Table 1
- Box Fill — Article 314.16(B) volume allowances for conductors, yokes, EGCs, clamps
- Service Load — Article 220 dwelling standard method with cooking, dryer, HVAC
- Motor Branch — 125% FLC conductor, Table 430.52 OCPD, 430.32 overload
- Ampacity Adjustment — Table 310.16 base × temperature correction × CCC adjustment × 110.14(C) terminal cap
- Ohm's Law — single- and three-phase power, current, voltage, resistance
- Wire Size from VD% — smallest AWG meeting your voltage-drop target

Every result shows the NEC articles it relies on, and one tap saves it to your workbench for later.

CODE LIBRARY
Searchable, offline-first reference covering definitions, services, overcurrent protection, grounding and bonding, conductors, raceways, motors and transformers, GFCI / AFCI / SPD, calculations, and emergency systems. Bookmark any entry and add your own note.

CODE PRACTICE
160 practice items across 16 NEC topics with progressive difficulty. Every item is tagged with the relevant article numbers. Card-style layout with optional schematic, explanation drawer, and bookmarks for review.

MOCK EXAM
Timed simulation with three formats — 80-question Master at 75% pass, 100-question Master at 70% pass, or a 30-question sprint. Question navigator, marked-for-review tracking, and article-level review after submission.

MY WORKBENCH
The toolkit's signature: every saved calculation, bookmark, and field note in one place. Rename runs, add notes to bookmarks, jot down jobsite observations, permit numbers, takeoff totals.

NEC 2023 READY
Updated for the 2023 cycle, including 230.85 dwelling emergency disconnect, 210.8 GFCI expansions, 240.87 arc-energy reduction, 406.12 tamper-resistant expansion, Article 625 EV charging overhaul, and 705.13 Power Control Systems.

BUILT FOR iPHONE AND iPAD
Adaptive layout fills an iPad with a sidebar split view and gives an iPhone a tappable dashboard. Dark panel-schedule visual identity — navy base with copper accents — easy to use on long jobsite sessions.

DISCLAIMERS
Master electrician requirements and NEC editions vary by state and local jurisdiction. Always verify your AHJ's adopted edition and pass threshold before sitting for the exam. This app is an independent toolkit and is not affiliated with NFPA, PSI, Prov, or any state licensing board.

## Master Electrician License Ex Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/d8/cf/d8/d8cfd85f-9ac8-99cb-9a4c-bea636ad879f/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.34.48.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/b0/22/ac/b022ac68-8012-c627-e1ff-d2547380fd30/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.36.15.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/77/de/db/77dedbc1-3dcc-c497-36c2-99e77499a764/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.34.54.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d4/4f/ab/d44fabe6-10e2-7e38-adb2-9d8bdcf33248/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.35.54.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c3/a6/1d/c3a61d5e-bccf-5376-1bb5-05610df45a13/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.42.38.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/cc/99/4b/cc994bb5-6b82-3af1-09cf-74b7d99188e7/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.43.10.png/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/e6/e6/9d/e6e69dd4-c11c-6998-8d12-7e4f7518abe0/Simulator_Screenshot_-_iPhone_13_Pro_Max_-_2026-05-14_at_16.36.02.png/1284x2778.png)







## Master Electrician License Ex Available In
- [Greece](https://apptail.io/app/master-electrician-license-ex-tkwz/greece)
- [Sri Lanka](https://apptail.io/app/master-electrician-license-ex-tkwz/sri-lanka)
- [United States](https://apptail.io/app/master-electrician-license-ex-tkwz/united-states)

---

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