Guidance Notes

To complement our larger Application Guides we compile Guidance Notes which offer concise guidance on specific areas of technical interest.

BS 7671:2018+A2:2022
Verification of Earth Fault Loop Impedance	Oct-24
Earthing & Bonding of Raised Access Floor Systems	Jun-24
BS 7671:2018 Amendment 3 Draft for Public Comment (DPC)	May-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
When is TN-C-S PME or PNB?	Jun-22
Self-Calibration of Test Instruments	Jun-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
BS 7671:2018
Cross-sectional area of neutral conductors	May-24
Joining of dissimilar metals	May-24
A guide to work on or near live LV electrical systems	Apr-24
Safe Isolation	Oct-24
Single and solid point bonding of single-core cables	Dec-23
BIM - the transition from PAS 1192 to BS EN ISO 19650	Nov-21
Considerations for the design of cables buried in the ground	Aug-24
Arc Flash Risk Assessments in the UK	Jun-21
IET CoP In-service Inspection & Testing of Electrical Equipment – 5th Edition	Oct-20
Electrotechnical Assessment Specification	Apr-24
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
Using Armouring as a Protective Conductor
Fault Currents in Generator Fed Installations
Guidance Note - Documentation Identification Notices v1.2	Dec-19
Transient over-voltage protection	Jun-19
The Employer’s Legal Duties to maintain Safe Electrical Installations	Aug-18
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?
Guide to Electrical Maintenance

Selection of a HV contractor	Feb-24
A guide to HV duty holder requirements
Installing LV supplies from HV transformers to consumer installations	July-23
A guide to working in high voltage environments	Feb-23
High/Medium Voltage Installations

Emergency Lighting Handover Requirements	Feb-24
BS 5839-6:2019 for Protection of Domestic Premises	Mar-21
Emergency Lighting - New	Apr-19
Emergency Lighting - Takeover	Apr-19
Fire Warning Systems - New	Apr-19
Fire Warning Systems - Takeover	Apr-19

Guidance Note BS EN 50310 2016 A1 (2020)

Oct-21

Electric Vehicle (Smart Charge Points) Regulations 2021	Jan-23
Electric Vehicle Charge Point (EVCP) installation and information	Dec-22
The Green Pivot- Low-carbon and energy saving opportunities for the electrotechnical contractor	Sep-22
Chapter 82 The Energy Prosumer	Apr-22
712 Solar Photovoltaic (PV) power supply systems	Apr-22
New Building Regulations Approved Document S	Aug-22
Power Factor Correction

Police Operational Advice and Security Industry Requirements for Response to Security Systems

Apr-20