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Area of work:

Low voltage

Low voltage predominately covers design and installation activities associated with:
•    BS 7671 – Requirements for Electrical Installations
•    BS 7909 - Code of practice for temporary electrical systems for entertainment and related purposes
•    BS 5266 - Code of practice for the emergency escape lighting of premises


The ECA has a wealth of technical guidance and support across these subject areas, ranging from Application Guidance to editable certification reports. Follow the links below to find out more.

In this Section

BS 7671

This section covers activities associated with BS 7671 – Requirements for Electrical Installations and much of our members work is covered in this category. Our Guidance and support in this area ranges from Application Guidance, to the provision of editable certificates.



TT Earthing Systems - Guidance Note
This Guidance Note highlights TT earthing system requirements, dispels any myths
and gives some clear guidance to both contractors and clients.
Feb 2017
Cross-sectional Area of Neutral Conductors
Best practice advice based on one of the most frequent technical enquiries.
Does Metallic Cable Tray / Ladder Require Bonding?  
Guidance Note Earthing of Raised Access Floors  
Guidance to Electrical Contractors on the Disability Discrimination Act 1995  
Guide to Electrical Maintenance  
Legal Obligations of Employers to Maintain all Electrical Installations in a Safe Condition  

Technical Bulletin

Wiring Accessory Replacement
This technical bulletin addresses the questions about wiring accessory
replacement and provides best practice guidance which can be applied
to both commercial and domestic locations.
Feb 2017
Joining Dissimilar Metals
This technical bulletin is designed to offer advice and guidance when
working on and with electrical equipment of dissimilar metals that
are to be connected, or joined together.


Power Factor Correction  
Completing paperwork for certification & inspection & testing of electrical installation to BS 76712  
Legal and Standardisation Aspects of Electrical Installation Contracting  
IP Rating of Trunking
The trunking currently being used in electrical installations typically has an International
Protection (IP) rating (otherwise known as Ingress Protection Rating) of IP3X
where joints have been fabricated on site.
Energy Security Checklist  

Key Factsheets

Date Created
Key Factsheet - BS 76712008 Requirements for Electrical Installations. IEE Wiring Regulations Sevent  
Key Factsheet – BS 7671 2008 Amendment 1 highlights and changes  
Key Factsheet - BS 7671 2008 Extraneous-Conductive-Parts  
Key Factsheet - Earthing of Raised Access Floors  
Key Factsheet – Harmonics  
Key Factsheet - BS7671 Extraneous Conductive Parts  
Key Factsheet - Voltage Drop in Consumer Installations  
Key Factsheet - BS 7671 2008 Amendment 2 - Electric Vehicle Charging Installations  
Key Factsheet - Facts about LED lighting  

Temporary Installations

Temporary installations are those covered by BS 7909 - Code of practice for temporary electrical systems for entertainment and related purposes.

Editable completion certificates are available to members who carry out work in this area.

ECA Group Companies & Brands: