Terms of Service
Please read these terms before using the Inspect 2391 platform, practice quizzes, or calculation tools.
1. Acceptable Use
The content on Inspect 2391 is provided for educational and exam preparation purposes. While every effort is made to maintain complete alignment with BS 7671:2018+A4:2026 and IET Guidance Note 3, electrical testing on real-world installations must only be performed by qualified, competent persons.
2. Calculation Disclaimers
Calculators provided on this site (Max Zs, Adiabatic, Voltage Drop, Ring Final Continuity) are study aids and field estimation tools. They do not replace competent engineering judgment or official statutory standards.
3. Intellectual Property & Trademarks
City & Guilds is a registered trademark of The City and Guilds of London Institute. Inspect 2391 is an independent platform and is not affiliated with, endorsed by, or certified by City & Guilds or the IET.
4. Subscriptions
In-app purchases and subscriptions are managed directly through the Apple App Store or Google Play Store under standard store terms.