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IET 9781837240456 Guidance Note 2 Amendment 4 | Isolation & Switching | 10th Edition | BS 7671:2018+A4:2026
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Guidance Note 2 Amendment 4 | Isolation & Switching | 10th Edition | BS 7671:2018+A4:2026

SKU: 9781837240456
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Guidance Note 2 Amendment 4 10th Edition is updated to BS 7671:2018+A4:2026. A practical guide to isolation and switching requirements, covering multipole source systems, protective device selection, bidirectional devices and firefighters’ switches for compliant electrical installations.

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Guidance Note 2 Amendment 4 – Isolation & Switching

The guidance note 2 amendment 4 is the fully updated 10th Edition of the IET’s essential publication covering isolation and switching requirements under BS 7671:2018+A4:2026.

It provides clear, practical guidance on one of the more technical areas of the Wiring Regulations and is ideal for professionals involved in design, inspection, testing, maintenance and operational procedures.

Key Amendment 4 Updates Include:

  • Isolation of multipole source systems
  • Selection of protective, isolation and switching devices
  • Bidirectional and unidirectional protective devices
  • Firefighters’ switches

Clear explanations and structured guidance make the guidance note 2 amendment 4 an important reference for ensuring safe isolation procedures and correct device selection in modern electrical installations.

Product Details

  • Publication Year: 2026
  • Pages: 110
  • ISBN-13: 978-1-83724-045-6
  • Format: Paperback (PBK)
  • Subject: Electrical Regulations





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Pre-order this item today to secure your copy ahead of release. The official publication date is 29 June 2026, with orders expected to dispatch shortly after. You’ll receive a confirmation email as soon as your order has been shipped.

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