Document Status
Current
Supplement
Mechanical & Electrical Supplement
Series
Technical Bulletin
Abstract
Guidance explaining risks from mixing devices and assemblies or fitting new devices into older enclosures, with requirements to verify conformity to the BS EN IEC 61439 series and installer responsibilities under BS 7671.
History
February 2026 edition.
Supersedes April 2019 edition.
Subjects
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Building services
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Electrical services
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Power supply/distribution
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Switchgear, fuses
Publisher History
BEAMA represents the electrotechnical industry for the UK, supporting manufacturers of electrical infrastructure products and systems from transmission through distribution to the environmental services in the built environment.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation
For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products.
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