Electrical Fault Finding in Banbury, Brackley & Surrounding Areas
Have you ever experienced your electricity suddenly switching off, only to discover that a switch in your consumer unit (commonly referred to as a fuse board) has tripped?
This can be incredibly frustrating, particularly when it happens repeatedly or without any obvious reason.
At L J Mullan Electrical, we carry out electrical fault finding for homeowners, landlords and letting agents throughout Banbury, Brackley and the surrounding villages.
One common issue homeowners encounter is an RCD that keeps tripping. But what causes this, and when should you contact a qualified electrician?
What Is an RCD and Why Is It Important?
An RCD (Residual Current Device) is an important electrical safety device designed to provide protection against electric shock and reduce the risk of certain electrical fires.
It works by monitoring the electrical current flowing through a circuit. If it detects an imbalance, which could indicate electricity leaking to earth, it disconnects the supply.
Most modern consumer units incorporate RCD protection, either through individual RCBOs or RCDs protecting multiple circuits.
An RCD tripping isn’t necessarily a sign that the device itself is faulty. In many cases, it’s doing exactly what it’s designed to do by detecting a potential electrical problem.
Faulty Electrical Appliances
One of the most common reasons for an RCD tripping is a faulty electrical appliance.
Common examples include:
- Washing machines and tumble dryers
- Dishwashers
- Electric ovens
- Kettles
- Fridges and freezers
- Outdoor electrical equipment
Over time, components within appliances can deteriorate, particularly heating elements, allowing electrical current to leak to earth.
Sometimes the problem only occurs when the appliance reaches a particular stage of operation, making the fault more difficult to identify.
Water Ingress and Damp Conditions
With the British weather, moisture-related electrical faults are something we regularly need to consider when investigating problems.
Outdoor electrical installations are particularly exposed to the elements.
Common problem areas include:
- External sockets
- Garden lighting
- Security floodlights
- Garage and shed supplies
- Outdoor junction boxes
- Damaged or poorly sealed electrical accessories
Even equipment designed for outdoor use can deteriorate over time, allowing moisture to enter.
If your RCD tends to trip following heavy rainfall, this could indicate water ingress somewhere within your electrical installation.
It’s important that these faults are investigated rather than repeatedly resetting the protective device.
Damaged Electrical Cables or Wiring
Electrical cables can become damaged for several reasons, including general deterioration, accidental damage during DIY work or interference from rodents.
For example, a screw or nail driven into a concealed cable could damage the insulation and create an electrical fault.
Some faults may develop gradually, while others occur immediately after building or decorating work.
Professional electrical testing can help identify insulation problems without unnecessarily damaging walls, floors or ceilings.
Earth Leakage From Multiple Appliances
Not every RCD trip is caused by one obvious faulty appliance.
Many modern electrical appliances naturally produce small amounts of earth leakage current during normal operation.
When several appliances or electrical circuits are protected by one RCD, these small amounts can accumulate.
This can occasionally result in unwanted tripping, even when no single appliance has a significant fault.
Older consumer unit arrangements that have multiple circuits sharing one RCD can be particularly inconvenient, as one issue may cause several circuits to lose power.
Modern consumer units incorporating individual RCBO protection can help reduce this inconvenience by providing independent protection to each circuit.
A Faulty RCD
Although less common than faults with appliances or wiring, RCDs themselves can occasionally develop problems.
Like other electrical components, protective devices can deteriorate or become defective.
However, replacing an RCD without investigating the underlying cause isn’t necessarily going to resolve the issue.
It’s important to establish whether the problem originates from the protective device, connected appliances or the electrical installation itself.
What Should You Do If Your RCD Keeps Tripping?
If your RCD trips, there are a few basic observations you can make safely.
For example, consider whether a particular appliance was operating when the electricity went off, or whether the problem happens during wet weather.
You may also be able to disconnect portable appliances by unplugging them, provided it is safe to do so.
However, if the RCD continues to trip, will not reset, or there are signs of overheating, burning or electrical damage, you should stop attempting to restore the supply and seek professional assistance.
Never bypass an RCD or attempt electrical repairs yourself.
How Do Electricians Find Electrical Faults?
Electrical fault finding isn’t simply a case of replacing components and hoping the problem disappears.
At L J Mullan Electrical, we take a systematic approach to investigating electrical faults.
Depending on the circumstances, this may include:
- Insulation resistance testing to identify damaged insulation or earth faults
- Testing RCDs to establish whether they’re operating correctly
- Investigating earth leakage currents
- Checking electrical connections and accessories
- Isolating and testing individual circuits to narrow down the problem
- Inspecting electrical equipment for deterioration, overheating or water ingress
Using professional electrical testing equipment allows us to investigate faults methodically and identify the underlying cause wherever possible.
Our aim is always to provide a reliable, long-term solution rather than a temporary fix.
Electrical Fault Finding in Banbury and Brackley
If your RCD keeps tripping, your sockets have stopped working or you’re experiencing unexplained electrical problems, it’s important to have the installation properly investigated.
L J Mullan Electrical is a local, family-run electrical business providing professional electrical services throughout Banbury, Brackley and surrounding areas, including King’s Sutton, Adderbury, Bloxham, Middleton Cheney, Deddington and nearby villages.
As a NAPIT-registered electrician, we take pride in providing a professional, thorough and reliable service, with electrical safety always being our priority.
Whether it’s a persistent electrical fault, an issue with outdoor lighting or concerns about an older consumer unit, we’re here to help.
Experiencing electrical problems in your home?
Contact L J Mullan Electrical to discuss your electrical fault-finding requirements.
