Electrical testing involves the process of evaluating and measuring electrical systems, ensuring they’re function properly, compliant with current regulations, and safe to use. Electrical systems must be tested to prevent shocks and fires. If they’re not routinely checked, there’s a risk of serious damage people and property, which would be a serious breach of Health & Safety laws. An electric inspection and test could be visual, checking for damaged cables, worn sockets, and signs of overheating. They could be more hands on and include testing a fuse box, circuit testing, earth tests, and functional checks. They’re critical for ensuring the safety of people and property, ensuring legal compliance, as well as checking g the efficiency of electrical systems.
Liability insurance is the umbrella terms for covering the costs of compensation and legal fees if a business or individual is found legally responsible for injuring someone or damaging their property.
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Faulty electrics can lead to shocks, fires and equipment failing—all of which could result in injury or death.
Electrical testing is important for legal compliance and the safety of workers and the public. Electrical inspection and testing identify hidden faults in wiring and appliances, ensuring laws and regulations are met.
More importantly, an electric test is often the difference between damaged property, an injured employee, and financial losses.
Our guide explores what electrical testing is and how proper measures can protect your business.
What does electrical inspection testing involve?
A qualified electrician will conduct a detailed evaluation of a property’s electrical system to determine it’s safe, working, and compliant with wiring regulations.
This could consist of visual checks and tests on wiring, sockets and other electrical appliances. Once completed, the electrician will issue an Electrical Installation Condition Report (EICR).
An EICR, standing for Electrical Installation Condition Report, is a formal electrical inspection and testing of a property’s fixed electrical systems. The report has two outcomes. If the installation is safe for continued use, it’ll be satisfactory.
Conversely, if it’s unsatisfactory, it will be categorised by severity with four main codes:
C1: There’s a risk of injury. Danger is present and immediate and action is needed.
C2: The appliance is potentially dangerous and corrective work is required.
C3: Whilst not dangerous, further improvements are advised.
FI: Additional checks are needed to ascertain safety.
These tests are essential for reducing workplace accidents and ensuring staff, the public and property are sufficiently protected.
How to test electrical resistance
Measured in Ohms, electrical resistance can be measured directly with electrical testing equipment like an ohmmeter, or indirectly with Ohm’s law.
Direct measurement
Isolate the component: For an accurate reading, disconnect the resistor or component from the circuit.
Set the meter: Select the Ohm setting.
Connect probes: With the ohmmeter’s probes, touch the two ends of the component.
Read the display: The ohmmeter sends a small current and calculates the resistance.
Indirect measurement
Set up the circuit: Place the component in a simple circuit that has a power source.
Measure voltage: To find the difference in volts, connect a voltmeter across the component.
Measure current: With an ammeter connected with the component, find the current in amps.
Calculate resistance: Apply the formula for Ohm’s law.
Types of electric test certificates
Several electrical test certificates exist to prove installations and appliances are safe and meet legal requirements. The certificate required will be determined by whether the work is new, minor, or a routine safety check.
Here are examples:
Electrical Installation Certificate (EIC): Where major work is undertaken, like a house rewire or a fuse box replacement, an EIC will be needed.
Minor Electrical Installation Works Certificate (MEIWC): This electrical test certificate is used when existing circuits have small alterations.
Electrical Installation Condition Report (EICR): As mentioned, an EICR will determine if an appliance is satisfactory or unsatisfactory.
Building Regulations Compliance Certificate (Part P): For “notifiable” work in domestic properties, this certificate shows that the satisfies building regulations.
Portable Appliance Testing (PAT) Report:PAT testing is used to confirm plug-in electrical appliances are safe to use.
FAQs: What is electrical testing?
Is electrical testing a legal requirement for business owners?
Despite the law not specifying a single test, the Electricity at Work Regulations 1989 stipulates that all electrical systems and equipment must be maintained in a safe condition to prevent danger. The standard process for demonstrating this is with an Electrical Installation Condition Report (EICR).
How often should an EICR be conducted?
The regularity of an EICR being carried out depends on the level of risk within a certain environment. For example, offices and retail will need an EICR every 5 years, industrial facilities are recommended to have one every 3 years, whilst construction sites should have them as often as every 3 months—mostly due to temporary installations.
Who is legally required to perform these tests?
As per the amended Electrotechnical Assessment Specification (EAS), by 1st October 2026, every individual carrying out electrical inspection and testing, such as an EICR, must have their own Level 3 qualification and have at least two years of recorded experience.
Is PAT testing mandatory?
PAT testing is not stated as a legal requirement. However, employers must ensure all plug-in electrical appliances are safe, and PAT testing is recognised as the main means to do this.
What happens if a fault is identified?
Should an EICR find a C1 or C2, then the report is deemed unsatisfactory and employers are legally mandated to make C1 hazards safe immediately. Remedial work must be completed for C2 faults.
Where can you find guidance covering electrical testing?
This e-learning session gives employers the tools and insights needed to properly protect their workforce. Click here to view it.
Final say: What is electrical testing?
With the risk of harm to people and property coming from defective electrical appliances, it’s clear why electrical testing is so important for employers.
Both the Electricity at Work Regulations 1989 and the Health and Safety at Work etc. Act 1974 combine to ensure employers properly maintain their electrical systems and prioritise the welfare of their staff.
Failing to do so will have serious consequences for business owners. That could be injured employees, or worse, dead. The reputational ramifications are huge, and the financial penalties could render businesses unable to operate.
Do you need support with electrical testing?
In 2025, there were 150 non-fatal injuries and 7 fatalities reported under RIDDOR resulting from electrical discharge.
Peninsula can help your business avoid being part of these statistics in 2026 and beyond.
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