Amendment 4 BS 7671 Checklist: Is Your Business Prepared for the October 15th Switch?

The October 15th Deadline: What You Need to Know

The electrical industry in the UK is no stranger to change, but the arrival of Amendment 4 to BS 7671:2018 (The IET Wiring Regulations) marks a significant shift in safety standards and technological integration. Published in early 2024, this amendment becomes mandatory on 15th October.

For contractors, sole traders, and large-scale electrical firms, this isn’t just a paperwork exercise. It involves fundamental changes to how we approach stationary battery storage, electric vehicle (EV) charging infrastructure, and medical locations. Failure to comply could lead to invalidated insurance, rejected certifications, and potential safety risks for your clients.

What is Amendment 4?

Amendment 4 (BS 7671:2018+A4:2024) is the latest update to the 18th Edition. Its primary purpose is to harmonise UK standards with international (IEC) and European (CENELEC) requirements. It addresses the rapidly evolving landscape of "prosumer" installations—homes and businesses that both consume and produce energy.

Your Amendment 4 Compliance Checklist

To ensure your business is ready for the October 15th switch, follow this essential checklist.

1. Update Your Documentation and Software

Before you step onto a site, your admin must be in order.

• Purchase the 'Brown Book': Ensure you have the latest version of BS 7671:2018 including Amendment 4.
• Update Certification Software: If you use digital certificates (like NICEIC, NAPIT, or EasyCert), ensure the software is updated to reflect the new terminology and requirements of Amendment 4.
• Review Standard Operating Procedures (SOPs): Update your internal company guidelines to include the new safety protocols.

2. Master the New Requirements for Stationary Battery Storage Systems (SBSS)

One of the biggest changes involves the installation of battery storage.

• Scope Expansion: Understand that Amendment 4 introduces significant new requirements for the design and installation of SBSS.
• Location Safety: Check that battery installations meet the new fire safety and ventilation standards.
• Protection Against Thermal Runaway: Ensure your designs include the specified protection measures to prevent battery overheating.

3. Review EV Charging Infrastructure

As the UK shifts toward electric transport, the regulations for charging points are tightening.

• Protective Equipotential Bonding: Review the updated rules on PME (Protective Multiple Earthing) and how it relates to EV charging points.
• RCD Selection: Ensure you are using the correct Type A, F, or B RCDs as specified for the latest charging equipment.

4. Technical Terminology Alignment

Amendment 4 changes some of the language we use to align with international standards.

• Harmonised Definitions: Familiarise yourself with updated definitions for "prosumer," "distributed energy resources," and "stationary batteries."
• Labelling: Ensure any onsite labelling on distribution boards or consumer units reflects the new terminology where required.

Why the October 15th Date Matters

While Amendment 4 was published earlier this year, the industry was granted a transition period. During this time, installations could be designed to either Amendment 3 or Amendment 4.

However, from 15th October, the transition period ends. Any installation designed after this date must comply with Amendment 4. If you are currently mid-project on a large-scale contract that will be completed after this date, you should check your contract terms to ensure your design remains compliant with the regulations in force at the point of completion.

The Risk of Non-Compliance

Operating under outdated regulations is a risk to your business’s reputation and finances.

• Insurance: Most professional indemnity and public liability policies for electricians require work to be carried out to the "current version" of BS 7671.
• Certification: Scheme providers (NICEIC, NAPIT, etc.) will audit your work against the new standards. Non-compliance could result in the loss of your registration.
• Cost of Remediation: If a system is found to be non-compliant after October 15th, you may be liable for the cost of upgrading the installation at no extra charge to the client, which could cost thousands of pounds.

FAQ: Amendment 4 BS 7671

Does Amendment 4 replace the entire 18th Edition?

No. Amendment 4 is an update to the existing BS 7671:2018 (18th Edition). It adds to and modifies certain sections rather than replacing the whole book.

What happens if I started a project before October 15th?

Generally, the version of the regulations in place at the design stage is what applies. However, for long-term projects, it is best practice to adopt the latest safety standards (Amendment 4) as soon as possible.

Do I need to buy a new copy of the regulations?

Yes, it is highly recommended to have the consolidated version (BS 7671:2018+A4:2024) to ensure you have the correct wording for all regulations in one place.

Get a Quote for Your Next Project with Pricing Penguin

Keeping up with electrical regulations is vital for safety, but we know that managing costs is just as important for homeowners and contractors alike. Whether you need a consumer unit upgrade to meet Amendment 4 standards or a full rewire, Pricing Penguin is here to help.

Pricing Penguin allows you to get an instant estimate for any home improvement project, from EV charger installations to complete electrical overhauls. We connect you with vetted, local tradespeople who are fully up-to-date with the latest BS 7671 standards, ensuring your job is done safely, legally, and at a fair price.

Visit Pricing Penguin today to get your instant estimate and find a pro you can trust.