Several key updates have shaped how installations are designed and tested today.

Among the most notable are: 

• Arc Fault Detection Devices (AFDDs): Recommended for circuits in areas with a higher fire risk or sleeping accommodation. 
  
• Surge Protection Devices (SPDs): Now required in most installations unless a risk assessment proves otherwise. 
• RCD Protection: All socket outlets up to 32A now require RCD protection.
• Cable Support: Wiring systems must be supported to prevent collapse during a fire.  
  
• Energy Efficiency: New considerations for prosumers — those generating and consuming electricity (Part 8).

These changes reflect a growing emphasis on safety, energy efficiency, and future-ready design. 

Amendment 4 is the latest update to BS 7671:2018,  the UK Wiring Regulations used for electrical installations. The updated version is known as:

BS 7671:2018+A4:2026

It introduces new requirements, revised guidance, and technical updates to reflect modern installation practices and emerging technologies.

Amendment 4 was published in April 2026. It's now the current version of the Wiring Regulations used across the UK.

BS 7671 itself is not law, but it's widely recognised as the accepted standard for compliance with UK electrical safety legislation, including the Electricity at Work Regulations 1989 and Part P in domestic work.

In practice, electricians are expected to work to the current edition.

PoE systems are increasingly common in:

• Smart buildings

• CCTV systems

• Wireless access points

• LED lighting

• Access control systems

Amendment 4 adds guidance on cable heating, current-carrying capacity, bundling, and safety considerations for higher-power PoE applications.

Yes, to demonstrate compliance with the latest regulations, which is covered in the 18th Edition including Amendment 4.

Even if you’ve previously completed your 17th Edition course, an update is essential to stay compliant and meet employer or competent person scheme requirements.

We offer both full and update versions of the 18th edition course designed to fit around your work schedule.

Our 18th edition course is 3 days and is delivered at our training centre in Stockport.

Yes, it costs £395 +VAT to enrol on the course, which includes training, examination and certification fees.

The assessment-only option is also available for those who hold the 17th Edition Amendment, which takes one day to complete and costs £145 +VAT.