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
A case study and a warning to would-be developers
Creating four dwellings... after half a century of doing this job, why, oh why, is it so difficult?
Reform of the fire engineering profession
Fire Engineers Advisory Panel: Authoritative Statement, reactions and next steps.
Restoration and renewal of the Palace of Westminster
A complex project of cultural significance from full decant to EMI, opportunities and a potential a way forward.
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this...
National Apprenticeship Week 2026, 9-15 Feb
Shining a light on the positive impacts for businesses, their apprentices and the wider economy alike.
Applications and benefits of acoustic flooring
From commercial to retail.
From solid to sprung and ribbed to raised.
Strengthening industry collaboration in Hong Kong
Hong Kong Institute of Construction and The Chartered Institute of Building sign Memorandum of Understanding.
A detailed description from the experts at Cornish Lime.
IHBC planning for growth with corporate plan development
Grow with the Institute by volunteering and CP25 consultation.
Connecting ambition and action for designers and specifiers.
Electrical skills gap deepens as apprenticeship starts fall despite surging demand says ECA.
Built environment bodies deepen joint action on EDI
B.E.Inclusive initiative agree next phase of joint equity, diversity and inclusion (EDI) action plan.
Recognising culture as key to sustainable economic growth
Creative UK Provocation paper: Culture as Growth Infrastructure.






















