Welcome to our latest guide on maintaining safety and standards in your facility. As we move through 2026, the landscape of electrical compliance continues to evolve. Staying ahead of these changes is essential for property owners, facility managers, and landlords.
Electrical testing is more than a box-ticking exercise; it is a critical safety protocol designed to protect lives and property. However, many organisations still fall victim to common errors that can lead to failed inspections, legal liabilities, or, in the worst cases, electrical fires.
This post identifies the most frequent mistakes made during electrical testing and outlines the steps necessary to ensure your installation remains compliant with the latest regulations, specifically BS 7671:2018+A4:2026.
The Shift to Amendment 4: What You Need to Know
The electrical industry operates under the BS 7671 standards, also known as the IET Wiring Regulations. As of April 2026, Amendment 4 (A4:2026) has become the national standard for all low-voltage installations in the UK.
If you are still managing your property based on older guidelines, you are likely already out of compliance. Amendment 4 introduces stricter requirements for documentation, new rules for stationary battery storage systems, and enhanced provisions for ICT and Power over Ethernet (PoE) infrastructure. To maintain a safe environment, you must adapt your maintenance schedules to reflect these updates.
Mistake 1: Confusing “Testing” with a Full EICR
One of the most widespread mistakes is the assumption that periodic “testing” of individual circuits is a substitute for a comprehensive Electrical Installation Condition Report (EICR).
While routine checks and PAT (Portable Appliance Testing) are useful components of a maintenance strategy, they do not provide the full picture. A formal EICR involves a systematic inspection and testing of the entire fixed electrical installation. This includes everything from the incoming supply and distribution boards to the final circuits, such as lighting and sockets.
Relying on ad-hoc measurements instead of a scheduled EICR leaves significant gaps in your safety profile. For commercial and industrial sites, this distinction is critical for insurance validity and meeting the requirements of the Electricity at Work Regulations 1989.
Mistake 2: Incorrect Use of Coding (C1, C2, C3, and FI)
When an engineer carries out an EICR, they assign codes to any observations. A frequent mistake is the misunderstanding or misapplication of these codes by the person responsible for the building.
- Code C1 (Danger Present): This indicates an immediate risk of injury. The inspector should take action to make the installation safe before leaving the site.
- Code C2 (Potentially Dangerous): This signifies a high risk that requires urgent remedial action.
- Code C3 (Improvement Recommended): This indicates a non-compliance with the current version of BS 7671 that does not necessarily make the installation unsafe but should be addressed.
- FI (Further Investigation): This is used when an inspector finds an issue that requires more in-depth analysis that cannot be completed during the standard inspection.
The mistake many make is treating a C3 as a failure. An installation can be “Satisfactory” even with C3 observations. Conversely, any C1 or C2 result immediately makes the report “Unsatisfactory.” Ensure you review your reports carefully and prioritise remedial work based on these specific codes to maintain compliance.
Mistake 3: Inadequate Scoping and Hidden Limitations
A compliant EICR must clearly define what was: and was not: inspected. Too often, reports are issued with vague or non-existent “limitations.”
If an engineer cannot access certain areas (such as cables under floorboards or within sealed ceiling voids), this must be agreed upon with the client and documented explicitly in the report. Leaving the limitations section blank or using generic terms like “none” is a major compliance error.
If a fault occurs in an area that was supposedly inspected but never actually checked, the building owner may be held liable. Start writing clear scopes of work with your contractor before the inspection begins to ensure every critical circuit is accounted for.
Mistake 4: Failing the Visual Inspection
Many people focus entirely on the numerical results from a multi-function tester. However, a significant portion of an EICR is based on visual inspection.
Mistakes occur when inspectors rush the visual stage, failing to identify signs of overheating, loose terminations, or damaged cable insulation. An installation might “test” well in terms of continuity and resistance but still be a fire hazard due to poor physical condition.
Ensure your electrical contractor spends adequate time inspecting consumer units, distribution boards, and accessories. A professional inspection should involve opening a representative sample of points to check the integrity of the terminations and the correct selection of protective devices.
Mistake 5: Overlooking New Technologies and Integrated Systems
With the rise of smart buildings, electrical testing now overlaps with several other specialised systems. Under Amendment 4, there are specific requirements for:
- Stationary Battery Storage: If your facility uses battery systems for solar energy storage or UPS (Uninterruptible Power Supply), these must now meet enhanced isolation and ventilation standards.
- EV Charger Installation: Electric Vehicle (EV) chargers must be tested for correct RCD (Residual Current Device) type and earthing arrangements. Using the wrong RCD type for a DC-heavy load is a common and dangerous mistake.
- ICT and PoE: Modern offices rely on Power over Ethernet. Amendment 4 introduces new rules for how these systems are earthed and integrated into the building’s main electrical installation.
If you are upgrading your security infrastructure, such as installing Dahua CCTV systems or Risco Group intruder alarms, ensure these systems are included in your overall electrical safety strategy. Integrating your Paxton access control and Record door automation with your fire and electrical safety systems is essential for both compliance and operational efficiency.
Documentation and Schematic Diagrams: The 2026 Standard
Amendment 4 places a much heavier emphasis on accurate documentation. This is particularly true for “special locations,” such as medical facilities or industrial sites with complex machinery.
A common mistake is the absence of up-to-date schematic diagrams. You should have clear drawings showing where every circuit starts and finishes. If you cannot provide these during an inspection, it may be recorded as a non-compliance.
Digital record-keeping is no longer optional; it is a necessity for maintaining a transparent audit trail. Modern EICRs should be delivered in a digital format that allows for easy tracking of remedial works and historical data comparison.
How to Stay Compliant: Your Action Plan
To avoid these common mistakes and ensure your facility remains safe and legal in 2026, follow these steps:
- Audit your existing records: Check the date of your last EICR. If it was conducted before the introduction of BS 7671:2018+A4:2026, it is time to schedule a review.
- Review your RCD types: Ensure your protection devices are suitable for modern equipment, especially if you have installed EV chargers or large-scale LED lighting systems.
- Update your schematics: Work with a qualified contractor to create or update your electrical distribution diagrams.
- Coordinate your services: Ensure your fire alarms, emergency lighting, and security systems are all part of a Planned Preventative Maintenance (PPM) contract.
- Partner with experts: Only use multi-accredited contractors. Being NICEIC certified ensures that the work is carried out to the highest industry standards.
Conclusion
Compliance is a continuous process, not a one-time event. By avoiding the common mistakes of poor scoping, incorrect coding, and ignoring new technology requirements, you can protect your business and your people.
At Dragon Security & Electrical Ltd, we specialise in delivering professional installation, maintenance, and compliance services across North Wales and the UK. Whether you require a comprehensive EICR, a new EV charger installation, or integrated security solutions, our team is here to help you navigate the complexities of 2026 regulations.
Start writing your safety strategy today. Contact Dragon Security & Electrical Ltd for a professional consultation on your electrical testing requirements.