Electrical equipment
BS 7671 (IET Wiring Regulations) defines ‘electrical equipment’ as:
| Any item for such purposes as generation, conversion, transmission, distribution or utilisation of electrical energy, such as machines, transformers, apparatus, measuring instruments, protective devices, wiring systems, accessories, appliances and luminaires. |
Electrical equipment within a building would therefore cover all of the items above – whether they are installed and ‘fixed’ as part of a fixed installation (and hence covered under BS 7671) or provided ‘loose’ by a building user and simply plugged in - typically referred to as a freestanding appliance.
One often misunderstood point is that wiring systems, such as cabling systems, busbar trunking and the like, are classified as ‘equipment’ under BS 7671. This is because, unarguably, they serve the purpose of transmission and distribution of electrical energy.
It is also essential that in the classification of equipment, whether or not it forms part of the fixed installation, is also made clear. This will vary from one building to another. This detail is essential when considering work such as ongoing maintenance or periodic testing and inspection.
--ECA
[edit] Related articles on Designing Buildings Wiki
- Articles about electricity.
- BS 7671 (IET Wiring Regulations)
- Consumer electronics.
- Consumer units.
- ECA articles.
- Electric lock.
- Electric motor.
- Electrical appliance.
- Electrical component.
- Electrical consumption.
- Electrical energy.
- Electrical installation.
- Electrical power.
- Electrical safety.
- Electrician.
- Electricity supply.
- Electrical system.
- Glossary of electrical terms.
Featured articles and news
Future Homes Standard Essentials launched
Future Homes Hub launches new campaign to help the homebuilding sector prepare for the implementation of new building standards.
Building Safety recap February, 2026
Our regular run-down of key building safety related events of the month.
Planning reform: draft NPPF and industry responses.
Last chance to comment on proposed changes to the NPPF.
A Regency palace of colour and sensation. Book review.
Delayed, derailed and devalued
How the UK’s planning crisis is undermining British manufacturing.
How much does it cost to build a house?
A brief run down of key considerations from a London based practice.
The need for a National construction careers campaign
Highlighted by CIOB to cut unemployment, reduce skills gap and deliver on housing and infrastructure ambitions.
AI-Driven automation; reducing time, enhancing compliance
Sustainability; not just compliance but rethinking design, material selection, and the supply chains to support them.
Climate Resilience and Adaptation In the Built Environment
New CIOB Technical Information Sheet by Colin Booth, Professor of Smart and Sustainable Infrastructure.
Turning Enquiries into Profitable Construction Projects
Founder of Develop Coaching and author of Building Your Future; Greg Wilkes shares his insights.
IHBC Signpost: Poetry from concrete
Scotland’s fascinating historic concrete and brutalist architecture with the Engine Shed.
Demonstrating that apprenticeships work for business, people and Scotland’s economy.
Scottish parents prioritise construction and apprenticeships
CIOB data released for Scottish Apprenticeship Week shows construction as top potential career path.
From a Green to a White Paper and the proposal of a General Safety Requirement for construction products.
Creativity, conservation and craft at Barley Studio. Book review.
The challenge as PFI agreements come to an end
How construction deals with inherited assets built under long-term contracts.
Skills plan for engineering and building services
Comprehensive industry report highlights persistent skills challenges across the sector.
Choosing the right design team for a D&B Contract
An architect explains the nature and needs of working within this common procurement route.
Statement from the Interim Chief Construction Advisor
Thouria Istephan; Architect and inquiry panel member outlines ongoing work, priorities and next steps.

























