# IET Wiring Regulations 18th Ed — BS 7671 A2:2022 & A4:2026

> Electrical regulations reference, calculator, and certification tool for UK electricians. (iPhone/iPad app by Eknath Kadam.)

- Source: https://appshunter.io/ios/app/iet-wiring-regulations-18th-ed/id1052750962 (this page in markdown: same URL + `.md`)
- Developer: [Eknath Kadam](https://appshunter.io/developer/465355268)
- Category: Education, Reference
- Price: Free with in-app purchases
- Rating: 5.00/5 from 9 App Store ratings · 29 written reviews indexed
- Age rating: 4+
- Requires: iOS 16 · 39 MB
- Languages: American English
- Released: 2015-11-04
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/iet-wiring-regulations-18th-ed/id1052750962/reviews.md

## What is IET Wiring Regulations 18th Ed?

IET Wiring Regulations is the ultimate professional companion for UK electricians. Go beyond exam prep with on-site calculators, quick reference tables, inspection checklists, and digital certificates you’ll use every working day.

NEW (May 2026): Updated to BS 7671:2018+A4:2026 with an in-app syllabus picker — switch between 2022 (A2 / 2382-22) and 2026 (A4 / 2382-26) question banks from Settings.

--- EXAM PREP ---
Over 670 practice questions across 9 topics covering BS 7671:2018+A2:2022 AND BS 7671:2018+A4:2026. Choose your syllabus version from Settings — both question banks are included. Comprehensive explanations with section and page references for every answer. Mock tests with weighted scoring track your readiness for C&G 2382-22 and 2382-26.

--- 21 BS 7671 CALCULATORS ---
• Cable Sizing - current carrying capacity per BS 7671
• Voltage Drop - mV/A/m calculations (Table 4D5B)
• R1+R2 - conductor resistance from Table I1
• Conduit & Trunking Fill - cable fill calculations
• Cable Resistance at Temp - temperature correction
• Earth Fault Loop (Zs) - impedance check against Table 41
• Prospective Fault Current (PFC)
• Adiabatic Equation - minimum CPC size (Table 54.4)
• MCB / RCBO Selector - device selection per Reg 411
• Discrimination - upstream/downstream coordination
• Connected Load Total - maximum demand (Appendix A)
• Diversity - demand reduction factors
• Three-Phase Balancing - load distribution
• Power Factor Correction
• Ohm’s Law / Power - foundational calculations
• Ring Final Circuit - R1, R2, Rn checks
• EV Charger Installation - Section 722 compliance
• Motor Circuit - design per Reg 552
• Solar PV / DC Sizing - Section 712
• Earthing & Bonding - conductor sizing (Table 54.8)
• Lighting / Downlights - lumen and spacing calculations

--- 12 QUICK REFERENCE CATEGORIES ---
• Key Formulas - essential BS 7671 equations
• Zs Values - earth fault loop impedance tables
• Cable Capacities - current ratings by installation method
• Correction Factors - Ca, Cg, Ci grouping and thermal factors
• Voltage Drop - mV/A/m tables and permissible limits
• Conductor Resistance - R1+R2 reference values
• Earthing & Bonding - systems, conductors, and sizing
• Special Locations - bathroom zones, swimming pools, saunas
• IP Ratings - ingress protection code reference
• RCD Requirements - types, ratings, and where required
• Disconnection Times - maximum times by circuit type
• Insulation Resistance - minimum IR values by voltage

--- 8 PROFESSIONAL UTILITIES ---
• Amendment Tracker - follow all changes from the 18th Edition through Amendments 1-4
• CPD Logger - log continuing professional development hours with annual target tracking
• Dead Testing - digital schedule of test results for dead testing
• Live Testing - digital schedule of test results for live testing
• Visual Inspection - digital schedule of inspection checklist
• Digital Certificates - create and export EICR and EIC certificates as PDF
• EICR Coding Guide - quick reference for C1, C2, C3 and FI observation codes
• Part P Guide - interactive decision tree for Building Regulations Part P compliance

--- EXAM TOPICS ---
• Part 1 - Scope, Object and Fundamental Principles
• Part 2 - Definitions
• Part 3 - Assessment of General Characteristics
• Part 4 - Protection for Safety
• Part 5 - Selection and Erection of Equipment
• Part 6 - Inspection and Testing
• Part 7 - Special Installations or Locations
• Part 8 - Prosumers Installation
• Use of Appendices

--- BUILT FOR THE JOB SITE ---
Flash cards for quick revision. Mock tests with weighted scoring. Progress tracking with pie charts. Works offline. All data saved locally on your device.

Whether you’re preparing for your C&G 2382-22 or 2382-26 exam, carrying out an EICR, or sizing cables on site – IET Wiring Regulations is the one app every electrician needs.

• Privacy Policy: https://www.webrichsoftware.com/privacy.html
• EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- BS 7671 exam practice questions
- 21 electrical calculation tools
- Quick reference tables for regulations
- Inspection checklists
- Digital EICR and EIC certificates
- Amendment tracker
- CPD logger

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Full Question Bank | $39.99 | per year |
| Full Question Bank | $19.99 | per 3 months |
| Full Question Bank | $24.99 | per 6 months |
| Full Question Bank | $9.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Question Bank | $6.99 | one-time |


## Recent user reviews (10 of 29)

All indexed reviews: https://appshunter.io/ios/app/iet-wiring-regulations-18th-ed/id1052750962/reviews.md

### 5/5 — Is this included amendment 4?

*2026-05-13*

I just try to find out before paying for this app, there is new 4th amendment come out mid April, looks like this is 3rd amendment, can you clarify this please. 
Thank you.

**Developer response:** Hi, Yes, this has 2026 4th amendment question bank included.

### 1/5 — Subscription cancellation

*2025-06-03, version 50*

Be aware -No clear procedure to  cancel subscription

### 5/5 — Sceptical but so worth it

*2025-05-08*

This was my first venture into the BS7671 exam after practising electrical work as a junior for a few years.

I bought the 1yr subscription as I wasn’t sure how long it would take or even when I could sit the exam.

I scored 98% in the real exam, first attempt.

This app helped tremendously and I’d thoroughly recommend it.

You can concentrate on one section at a time, set timers to get a feel for the exam environment and many other little tweaks which may or may not help you as a student.

Tech support was simple when I spotted a mistake as you can report it via the app.
No need to slag anyone off, just report it and enjoy life a little more 👍🏻

Obvious 5 stars

**Developer response:** Thank you for your review. We are motivated to keep the app up to date with such appreciation. And congratulations for passing on your first attempt!

### 5/5 — L Douglas

*2025-02-16, version 47*

Fantastic thanks

### 3/5 — Needs updating

*2024-10-15*

Part 4 questions don’t work for the table questions been updated and got worse.

**Developer response:** Hi Owen, could you please email us some screenshots as we are unable to reproduce the issue. support@webrichsoftware.com

### 1/5 — Wrong Question

*2024-10-04, version 39*

On Part 4 few wrong answers and questions but still glad to have this app I wish it was an option to correct them as example on part 4 418.1.5 and so on.
But it’s helpful knowledge

### 2/5 — Limited access

*2024-06-12*

having to pay for education and the extended knowledge is ridiculous

### 2/5 — Review

*2024-05-10*

I paid for this app over 3 months the questions and answers were great.
It shows you where you can find the answers in bs7671 but only a handful out of around 580 are only in the exam 
I took the exam expecting many in the exam but I was wrong.
I would strongly advise to undertake a 3 day course through the niceic to guide you through navigation of the course with a lead of light

**Developer response:** Hello Relley, our app is designed to be a supplementary tool rather than a standalone resource for exam preparation.

### 5/5 — Big help

*2024-04-21*

This is very easy way to improve yr electric skill

### 5/5 — Electrical improver

*2024-02-21, version 28*

Passed my 18th edition full marks thanks to this app

## Frequently asked questions about IET Wiring Regulations 18th Ed

### What does the IET Wiring Regulations app do?

This app serves as a professional companion for UK electricians. It offers extensive exam preparation resources, including over 580 practice questions and mock tests covering BS 7671 standards. Additionally, it provides essential on-site tools such as 21 calculators for various electrical calculations, quick reference tables, inspection checklists, and the ability to create and export digital certificates.

### What are the key features for electricians on the job?

For daily use, the app includes 21 specialized calculators covering tasks like cable sizing, voltage drop, earth fault loop impedance, and MCB/RCBO selection. It also offers 12 quick reference categories with essential formulas, tables, and guides on topics like earthing, special locations, and RCD requirements. Professional utilities like digital testing schedules and certificate generation are also available.

### How does this app help with exam preparation?

The app provides over 580 practice questions spread across 9 topics, all aligned with BS 7671:2018+A2:2022 standards, including the 2023 Corrigendum. Each answer includes comprehensive explanations with section and page references. Mock tests with weighted scoring are available to help users track their readiness for qualifications like the C&G 2382-18 exam.

### Is this app compatible with different devices?

While the provided description does not explicitly state compatibility details, this application is designed for mobile use. Users can typically expect it to be available on major mobile operating systems like iOS and Android, allowing electricians to access its features on their smartphones or tablets.

### What is the cost of using the IET Wiring Regulations app?

The application is offered as a free download, but it includes in-app purchases. This suggests that while some core functionalities or basic content may be accessible for free, advanced features, comprehensive question banks, or specific calculators might require a purchase to unlock.

## Version history (last 5 releases)

### 72 — 2026-08-24

Bug fixes

### 71 — 2026-07-19

Major data update: corrected and refined a large set of question data, explanations, and reference content across the app.

### 70 — 2026-07-08

Bug fixes

### 69 — 2026-07-07

Bug fixes and improvements

### 68 — 2026-06-29

Question Bank Corrections

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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 2026-09-01.*