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Low Voltage Electrical Installations

Low voltage electrical installations primarily covers design, installation and inspection and testing of systems to BS 7671, including associated safe systems and practices.

Find information relating to installations and practices for low voltage electrical installations.

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Developed by our Technical experts and offering concise advice on specific areas of interest in low voltage electrical installations.                          

BS 7671  
RCD Selection for Heat Pumps May-25
BS 7671:2018 Amendment 3 Draft for Public Comment (DPC) May-24
Using Armouring as a Protective Conductor Nov-24
Does Metallic Cable Tray / Ladder Require Bonding? Dec-24
Raised Access Floor Systems - Earthing & Bonding Oct-24
Requirements for Cable Separation Sep-23
Installing LV supplies from HV transformers to consumer installations July-23
Corrigendum to BS 7671:2018+A2:2022  May-23
Changes to Section 710 in BS 7671 Amendment 2 Jul-22
A Brief Guide to Installations in Medical Locations Jul-22
Self-Calibration of Test Instruments Jun-22
Domestic Installation Handover Pack Apr-22
Top 10 Changes in Amendment 2 Apr-22
Precautions where particular risks of fire exist Apr-22
Changes to Electrical Testing (and Paperwork) Apr-22
Different Types of RCDs (and other considerations) Apr-22
Single and solid point bonding of single-core cables Dec-23
ERA 69-30 series of guides Nov-21
Documentation Identification Notices v1.2 Dec-19
Transient over-voltage protection Jun-19
Fault Currents in Generator Fed Installations Feb-19
EICR coding consideration  Dec-18
Adequacy of Existing DNO Fused Cut-Outs Dec-18
Use of non typical socket outlets Dec-18
TT Earthing Systems - Guidance Note  Feb-17
Competency & Safe Working Practices
Continuing professional development (CPD) Jan-25
A guide to work on or near live LV electrical systems Jan-25

Safe Isolation

Apr-24
Arc Flash Risk Assessments in the UK Jul-21
Electrotechnical Assessment Specification - October 2024 Jun-21
The Employer’s Legal Duties to maintain Safe Electrical Installations Aug-18
Guide to Electrical Maintenance Oct-16
BS 7671  
Bonding of commercial kitchens Feb-24
Installing Surge Protective Devices retrospectively Nov-22
Additional requirements for outside lighting Jun-22
Verbal forms for expression of provisions Jun-22
Table 3A has been removed from BS 7671:2018+A2:2022 May-22
Clarifications made to the requirements for RCD testing Apr-22
Protection Against Overvoltage Apr-22
Precautions where particular risks of fire exist Apr-22
Installing and additional earth electrode in TN earthing systems Apr-22
Bonding of Outbuildings Apr-22
Date of Inception for BS 7671:2018+A2:2022 Apr-22
The use of BS 7288-type socket-RCDs and Regulations 531.3.4.1 and 531.3.4.2 Apr-22
Arc Fault Detection Devices (AFDDs) Apr-22
HMO, care homes and purpose-built student accommodation definition Apr-22
Functional Earthing Apr-22
Installing an additional earth electrode in TN earthing system Apr-22
Bonding of commercial kitchens Feb-24
Use of consumers electrical cabinet for additional equipment Oct-21
Domestic consumer units not supplied by BS 88-3 fuses May-21
EICR observation writing Apr-21
BS 7671: 2018 Amendment 1 Feb-20
LED lights and circuit breaker selection Jan-20
AFDD and Sleeping Accomodation Jun-19
Voltage Drop Feb-19
Supplementary equipotential bonding Jun-18
Departures from BS 7671 Jun-18
Cable Supports Jun-18
RCDs and Socket Outlets Jun-18
Selectivity & Desk Studies Jun-18
Use of YY CY SY Cables Apr-18
Responsibilities for Passive Fire Stopping of Building Services Structural Openings Nov-17
Joining Dissimilar Metals Feb-17
Wiring Accessory Replacement Feb-17
Electrical Installations After a Flood or Fire Jan-17
IP Rating of Trunking Oct-16
Competency & Safe Working Practices
Reporting of Possible Neutral Current Diversion Dec-23

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