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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 
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  Apr-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