Tripping Circuits
Fixed in South Wales
Circuits keep tripping? Our NAPIT approved electricians diagnose and fix tripping RCDs, MCBs and fuse boards quickly across Cardiff, Newport, Swansea and all of South Wales.
Tripping Circuit Repair Services in South Wales
A tripping circuit breaker is one of the most common electrical problems in UK homes. While it's a safety feature designed to protect you, frequent or unexplained tripping indicates an underlying fault that needs professional investigation.
Common causes include faulty appliances, overloaded circuits, moisture in wiring, deteriorated insulation, and earth leakage faults. At Megalec Electrical Solutions, we use systematic testing to identify exactly what's causing your circuits to trip and fix it permanently.
We serve homes and businesses across Cardiff, Newport, Swansea, Bridgend, Caerphilly and surrounding areas. Don't keep resetting your trip switch – let us find and fix the cause.
Common searches we help with include: RCD keeps tripping South Wales, MCB won't stay on Cardiff, circuit breaker tripping for no reason Bridgend, fuse keeps blowing Newport, electrics keep tripping at night Swansea, RCD trips when it rains, and circuit trips when washing machine runs.
Tripping circuits are particularly common in older properties where wiring insulation has deteriorated over time, in properties with extensions where circuits may be overloaded, and in homes with damp issues where moisture is getting into outdoor circuits or junction boxes. We're experienced with all these scenarios.
It's important to understand that your RCD is doing its job when it trips — it's detecting a genuine fault. The danger comes from repeatedly resetting it without finding the cause, or from replacing it with a less sensitive device. Our job is to find what's causing the trip and fix it properly, so your protection devices can do their job without nuisance tripping.
Why Circuits Trip & How We Help
Understanding and resolving tripping issues
RCD Tripping
RCDs trip when they detect earth leakage current. We test each circuit individually to isolate which one has the fault and identify the exact cause — appliance, wiring, or moisture.
MCB Tripping
MCBs trip due to overload or short circuit. We check circuit loading, test for short circuits, and resolve the issue — whether it's a wiring fault or an overloaded circuit.
Faulty Appliance Detection
Often a faulty appliance causes tripping. We systematically test to identify if an appliance is the culprit before investigating wiring, saving you unnecessary repair costs.
Moisture & Damp Issues
Water ingress into wiring, junction boxes, or outdoor circuits is a common cause of RCD tripping. We locate moisture problems and make safe with weatherproof repairs.
Wiring Insulation Faults
Aged or damaged cable insulation can cause earth leakage. We test insulation resistance on all circuits and replace deteriorated sections to restore safe operation.
Permanent Solutions
We don't just reset your trip switch. We find and fix the root cause so the problem doesn't keep coming back — giving you lasting peace of mind.
How We Fix Tripping Circuits
Systematic diagnosis for lasting results
Describe the Tripping
Tell us which switch trips, how often, and when it happens. This helps us plan our investigation efficiently and bring the right equipment.
Circuit Isolation Testing
We systematically disconnect circuits to identify which one is causing the trip, then test that circuit thoroughly using insulation resistance testers.
Identify Root Cause
Using insulation resistance testing and visual inspection, we pinpoint the exact fault – whether it's wiring, an appliance, or moisture ingress.
Repair & Verify
We fix the fault and retest the entire circuit to confirm the tripping has been resolved permanently before we leave.
Describe the Tripping
Tell us which switch trips, how often, and when it happens. This helps us plan our investigation efficiently and bring the right equipment.
Circuit Isolation Testing
We systematically disconnect circuits to identify which one is causing the trip, then test that circuit thoroughly using insulation resistance testers.
Identify Root Cause
Using insulation resistance testing and visual inspection, we pinpoint the exact fault – whether it's wiring, an appliance, or moisture ingress.
Repair & Verify
We fix the fault and retest the entire circuit to confirm the tripping has been resolved permanently before we leave.
Why Choose Megalec for Tripping Circuits?
Tripping circuits are a symptom, not the problem. Many people waste money replacing consumer units when the actual fault is elsewhere. Our diagnostic approach finds the real cause first, saving you unnecessary expense and ensuring a permanent fix. We've resolved hundreds of tripping circuit cases across South Wales — from simple appliance faults to complex wiring deterioration in older properties.
Service Areas Across South Wales
Available throughout Cardiff, Newport, Swansea, Bridgend & surrounding areas
Frequently Asked Questions
RCDs trip when they detect current leaking to earth. Common causes include faulty appliances, moisture in wiring, damaged cable insulation, or a fault on an outdoor circuit. We test systematically to find the exact cause rather than guessing.
The tripping itself is a safety feature protecting you. However, the underlying fault causing the trip could be dangerous — it may indicate damaged wiring, water ingress, or an appliance fault that could cause a fire or electric shock if left unresolved.
Diagnosis and simple repairs typically cost £100–£200. If the fault requires more extensive work like replacing a section of wiring, costs may be £200–£400+. We always provide a clear quote before proceeding with any repairs.
No – replacing the RCD won't fix the underlying fault. The RCD is doing its job by detecting a genuine earth leakage. Replacing it with a less sensitive one would be dangerous. The fault itself needs to be found and repaired properly.
Intermittent tripping often relates to appliances that only run at certain times (washing machine, dishwasher, heating), moisture that varies with weather, or thermal faults that only occur when circuits are under load. We use systematic testing to identify these patterns.
You can reset it once to see if it holds. If it trips again immediately or repeatedly, stop resetting it and call an electrician. Repeatedly resetting a tripping circuit can be dangerous if there's a serious fault present.
Rain-related tripping almost always indicates moisture getting into an outdoor circuit — garden sockets, security lights, outbuilding supplies, or outdoor junction boxes. We locate the moisture ingress point and carry out weatherproof repairs.
This usually means either the washing machine itself has developed an earth fault (test by unplugging it and seeing if the circuit holds), or the circuit is overloaded. We can test the appliance and the circuit to determine the cause.
Yes. We diagnose and repair tripping circuits in offices, shops, restaurants, and industrial premises across South Wales. We can work outside business hours to minimise disruption to your operations.
An RCD (Residual Current Device) trips when it detects earth leakage — usually caused by a wiring fault, moisture, or faulty appliance. An MCB (Miniature Circuit Breaker) trips due to overload or short circuit. The type of trip helps us narrow down the cause quickly.
Circuits Keep Tripping in South Wales?
Stop the frustration. Contact Megalec today and we'll find and fix the cause of your tripping circuits.