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Electrium

How to apply uni and bidirectional devices in accordance with BS 7671 AMD3

Published: 2 September 2025 Category: On demand webinar

This session will draw on insights from BEAMA's technical bulletin and the latest IET guidance, offering actionable clarity on applying the new regulations safely and compliantly.

With the growing adoption of solar PV systems, EV chargers and energystorage technologies, electrical installations are increasingly subject to bidirectional current flows.

AMD3 to BS 7671, published last year, introduces important updates to help designers, installers and specifiers correctly apply unidirectional and bidirectional protective devices in line with modern installation needs.

In this webinar we explored:

  • The new definitions introduced in Part 2 of BS 7671

  • Regulation 530.3.201 and its practical implications

  • How to identify unidirectional vs bidirectional devices in practice

  • Common mistakes to avoid when installing protective devices

  • The impact on existing installations and EICR assessments

  • Real-world applications: PV, EV, and battery storage integration

  • Why standardising on bidirectional devices may offer future-proof benefits

This session will draw on insights from BEAMA's technical bulletin and the latest IET guidance, offering actionable clarity on applying the new regulations safely and compliantly.

This webinar is a must watch if you want to stay aligned with the latest UK wiring standards.