The IET On-Site Guide is a practical, simplified reference to BS 7671 that helps electricians quickly access key information while working on site. It is widely used for installation checks, calculations, and inspection support.
Frequently Asked Questions
Q1. What is the IET On-Site Guide used for?
It's used on site to quickly reference key information from BS 7671, including cable sizing, voltage drop, earthing and inspection and testing checks.
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Q2. Do I need this as well as the IET Wiring Regulations book?
The On-Site Guide is often used alongside BS 7671. It provides quicker access to commonly used information, while the Wiring Regulations contain the full standard.
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Q3. Is the On-Site Guide suitable for the 18th Edition course?
Yes. It's commonly used to support learning alongside the 18th Edition course and can help with understanding how the regulations are applied in practice.
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Q4. Who should use the On-Site Guide?
It's intended for electricians, trainees and contractors who need a practical reference when carrying out installation, inspection, and testing work.
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Q5. What does the On-Site Guide Include?
Tables and guidance on cable selection, voltage drop, earthing, bonding, and basic inspection and testing requirements.
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Q6. Is this the latest version of the On-Site Guide?
Yes, this is the 9th Edition of the IET On-site Guide, updated to reflect BS7671:2028 + Amendment 4:2026. It aligns with the current 18th Edition (2382-26) course and Amendment 4 update course.
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