How Electrical Fault Finding Works

How Electrical Fault Finding Works

When your power cuts out or a circuit keeps tripping, the problem isn't always obvious. That's where electrical fault finding comes in. At Kennewell Electrical, fault finding is about methodical testing, experience, and the right tools to track down what's actually going wrong. Here's how the process works and what you can expect when we're called out to diagnose an electrical issue.

Fault finding isn't guesswork. It's a structured process that starts with understanding the symptoms and ends with a clear diagnosis and a plan to fix it. Whether it's a single faulty outlet or a whole-house power issue, the approach stays the same.

Understanding the Symptoms

The first step in any fault finding job is gathering information. When did the problem start? Does it happen at a particular time of day or when you use a certain appliance? Has anything changed recently in your home, like new equipment or renovations?

At Kennewell Electrical, we ask these questions because they help narrow down the possible causes. A circuit that trips every time you turn on the heater points to an overload issue. A safety switch that trips randomly might indicate a fault in the wiring or a degraded appliance. The more detail you can provide, the faster we can zero in on the cause.

Sometimes the fault is intermittent, which makes it harder to pin down. In those cases, we look for patterns and use diagnostic tools to test the system under different conditions.

Visual Inspection of the Switchboard

Once we've got a sense of what's happening, the next step is usually a visual check of the switchboard. We're looking for obvious signs of damage, wear, or poor installation. Scorch marks, loose connections, corroded terminals, and outdated components all give us clues about where the fault might be.

Switchboards take a lot of stress over the years. Connections can work loose, circuit breakers can wear out, and older boards may not have the capacity or protection features needed for modern homes. At Kennewell Electrical, we check the condition of your switchboard as part of every fault finding job.

If we find something that needs replacing, like a faulty circuit breaker or an old ceramic fuse, we'll flag it and explain what's needed. Sometimes the fault is right there in the board. Other times, it's further down the line in the wiring or appliances.

Testing Circuits and Wiring

If the switchboard looks fine, the next step is testing individual circuits. We use a range of tools, including multimeters, insulation resistance testers, and continuity testers, to check the health of your wiring.

Insulation resistance testing checks whether the insulation around your wiring is still doing its job. Low resistance means current is leaking, which can cause safety switches to trip or create shock risks. Continuity testing checks whether circuits are complete and connections are solid. At Kennewell Electrical, we also look for signs of physical damage, like rodent bites, moisture ingress, or cables that have been pinched during renovations.

Older homes in particular can have wiring that's degraded over time. Rubber and fabric insulation breaks down, connections corrode, and loads that were fine 30 years ago are now pushing circuits to their limits. Testing helps us find these issues before they lead to bigger failures.

Isolating Faulty Appliances

One of the most common causes of electrical faults is a faulty appliance. Fridges, washing machines, toasters, and other household devices can develop internal faults that cause them to leak current or draw more power than they should.

At Kennewell Electrical, we isolate appliances one by one to see if the fault clears when a particular item is disconnected. If the safety switch stops tripping once we unplug the washing machine, for example, we know the machine is the problem. From there, it's up to you whether to repair or replace the appliance.

Sometimes the appliance looks fine on the outside but has internal damage that's invisible until it's tested. We can check appliances with portable appliance testers (PAT testing) to confirm whether they're safe to use or need replacing.

Checking Earthing and Grounding

Proper earthing is essential for electrical safety. If your earthing system is compromised, faulty appliances or damaged wiring can create serious shock risks. At Kennewell Electrical, we test the earth connection as part of the fault finding process.

Earth testing involves measuring the resistance between your earthing system and the ground. High resistance means the earth path isn't effective, which can prevent safety switches from working properly. We also check earth stakes, bonding connections, and earth wiring to make sure everything's in good condition.

If we find an earthing fault, we'll repair or upgrade it as needed. It's one of those critical safety features that you don't notice until something goes wrong.

Using Thermal Imaging for Hidden Faults

Some faults aren't visible to the naked eye. Loose connections, overloaded circuits, and failing components can all generate heat before they fail completely. That's where thermal imaging comes in.

At Kennewell Electrical, we use thermal cameras to scan switchboards, wiring, and power points for hot spots. A connection that's running 20 or 30 degrees hotter than it should be is a fault waiting to happen. Catching it early means we can fix it before it causes a trip, a fire, or equipment damage.

Thermal imaging is particularly useful in commercial and industrial settings, but we also use it on residential jobs where the fault isn't immediately obvious. It's a non-invasive way to see what's happening behind the walls and inside the switchboard.

Explaining the Diagnosis and Recommending Repairs

Once we've found the fault, we explain it in plain language. You'll know what went wrong, why it happened, and what needs to be done to fix it. At Kennewell Electrical, we don't use jargon or over-complicate things. You'll get a clear answer and a straightforward recommendation.

If the fix is simple, like replacing a faulty outlet or tightening a loose connection, we'll often do it on the spot. If it's more involved, like rewiring a circuit or upgrading a switchboard, we'll provide a quote and timeline so you know exactly what to expect. Either way, you're in control of what happens next. We'll never push unnecessary work, and we'll always explain why something is or isn't needed.