IET Wiring

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.

--- EXAM PREP ---

Over 580 practice questions across 9 topics covering BS 7671:2018+A2:2022 (18th Edition with 2022 Amendment and 2023 Corrigendum). Comprehensive explanations with section and page references for every answer. Mock tests with weighted scoring track your readiness for C&G 2382-18.

--- 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 1-3

• 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 2382-18 exam, carrying out an EICR, or sizing cables on site – IET Wiring Regulations is the one app every electrician needs.

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