Guidance Note 2: Isolation & Switching provides clear guidance on what can be a confusing aspect of BS 7671. It is ideal for those working in design, testing and inspection and maintenance and operational aspects and has been fully updated to BS 7671:2018+A4:2026, including isolation of multipole source systems, guidance on the selection of protective, isolation and switching devices; bidirectional and unidirectional devices and Firefighters switches.
Cooperating organizationsAcknowledgementsPrefaceIntroductionChapter 1: Statutory requirementsChapter 2: Overview of BS 7671Chapter 3: Definitions and principlesChapter 4: IsolationChapter 5: Switching off for mechanical maintenanceChapter 6: Emergency switching and emergency stoppingChapter 7: Functional switchingChapter 8: Firefighters' switchesChapter 9: Special installations or locationsChapter 10: Prosumer's low-voltage electrical installationsAppendix A: Safety service and product standards of relevance to this Guidance NoteAppendix B: Safe isolation proceduresAppendix C: Permit-to-Work proceduresAppendix D: Safety locks and group lock boxesAppendix E: Forms of separation for LV switchgearIndex