Ace Your IET Wiring Regulations Exam
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580+
Practice Questions
22
BS 7671 Calculators
12
Reference Categories
8
Utility Tools
Everything You Need in One App
From exam prep to on-site tools — the complete companion for electricians studying BS 7671.
Exam Prep
580+ questions across 9 topics with detailed explanations and mock tests.
Calculators
22 interactive calculators for cable sizing, Zs, voltage drop, diversity, and more.
Quick Reference
12 categories of BS 7671 tables, formulas, Zs values, and correction factors.
Utility Tools
8 tools including testing checklists, digital certificates, CPD logger, and Part P guide.
Study Guides
In-depth guides for all 9 parts of BS 7671, with key areas and exam tips.
Mobile App
Study offline on iOS and Android with progress tracking, mock tests, and bookmarks.
Practice by Topic
Choose a topic to start practising. Each topic contains questions based on BS 7671.
1 Part 1 - Scope, Object and Fundamental Principles
8 free questions / 35 in app
2 Part 2 - Definitions
6 free questions / 20 in app
3 Part 3 - Assessment of General Characteristics
14 free questions / 41 in app
4 Part 4 - Protection for Safety
24 free questions / 117 in app
5 Part 5 - Selection and Erection of Equipment
28 free questions / 130 in app
6 Part 6 - Inspection and Testing
14 free questions / 28 in app
7 Part 7 - Special Installations or Locations
12 free questions / 145 in app
8 Part 8 - Prosumers Installation
8 free questions / 15 in app
? Use of Appendices
6 free questions / 49 in app
BS 7671 Electrical Calculators
Free browser-based tools covering cable sizing, voltage drop, earth fault loop impedance, diversity factors, adiabatic equation, and more. No data leaves your device.
Zs Values
Key Formulas
Cable Data
Correction Factors
RCD Rules
IP Ratings
Quick Reference Tables
Instantly access the BS 7671 tables and formulas you need most — Zs values for MCB types B/C/D, cable current-carrying capacities, correction factors, voltage drop limits, RCD requirements, disconnection times, and insulation resistance minimums.
Browse Quick ReferenceProfessional Utility Tools
Beyond exam prep — practical tools for working electricians, available in the app.
Dead Testing Checklist
Digital Certificates
Part P Guide
Amendment Tracker
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