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    Guidance Note 3 Amendment 4
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    Guidance Note 3 | Inspection & Testing | 10th Edition | BS 7671:2018+A4:2026

    SKU: 9781837240487
    Pre-order dispatch begins week commencing 15 April 2026. *
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    Guidance Note 3 Amendment 4 10th Edition is updated to BS 7671:2018+A4:2026. A key reference for electricians carrying out inspection and testing, covering EFLI limits, conductor identification, prosumer installations and stationary secondary batteries in line with latest Wiring Regulations.

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    Description

    Guidance Note 3 Amendment 4 – Inspection & Testing

    The guidance note 3 amendment 4 is the fully updated 10th Edition of the IET’s essential inspection and testing publication, aligned with BS 7671:2018+A4:2026.

    It provides detailed, practical guidance for electricians, inspectors and contractors responsible for verifying electrical installations. This edition incorporates all changes introduced through Amendment 4 to the 18th Edition Wiring Regulations.

    Key Updates in Amendment 4

    • Identification of conductors
    • Stationary Secondary Batteries
    • Prosumers’ Electrical Installations
    • Recommended initial frequencies of inspection
    • Maximum permissible measured Earth Fault Loop Impedance (EFLI)

    Clear explanations, worked examples and structured guidance make the guidance note 3 amendment 4 an essential reference for both on-site use and those studying for inspection and testing qualifications.

    Product Details

    • Publication Year: 2026
    • Pages: 206
    • ISBN-13: 978-1-83724-048-7
    • Format: Paperback (PBK)
    • Subject: Electrical Regulations





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    Delivery info
    You’re placing a pre-order for this item. Shipping is scheduled to begin the week commencing 15 April 2026, and we’ll notify you as soon as your order is on its way.