01
Repeated tripping
An RCD, RCBO or circuit-breaker trips repeatedly.
Find the cause, not just the symptom
Electrical fault finding
Structured investigation for repeated tripping, intermittent power, flickering lights, burning smells, discoloured outlets and other unexplained electrical problems.
Effective fault finding avoids guesswork. Inspection, testing and logical diagnosis are used to narrow down the cause before repairs are proposed.
Common warning signs
When should a fault be investigated?
02
Intermittent power
A circuit or accessory works only some of the time.
03
Flickering lights
Lights dim, flicker or stop working unexpectedly.
04
Heat or smell
Burning smells, warmth, buzzing or visible discolouration.
05
Failed outlets
Dead sockets, switches or accessories that operate intermittently.
06
Unexpected behaviour
Unexplained loss of supply or equipment operating unexpectedly.
A logical diagnostic process
How electrical faults are traced
1
Understand symptoms
Establish when the issue occurs and what is affected.
2
Inspect and assess
Review accessible equipment, connections and protective devices.
3
Test systematically
Use appropriate electrical tests to narrow down the fault.
4
Explain and agree next steps
Confirm the likely cause and discuss repair options clearly.
Frequently asked questions
Questions about electrical fault finding
Select a question below to reveal the answer.
Why does my RCD keep tripping?
Possible causes include a faulty appliance,
damaged wiring, moisture, accumulated leakage current
or a fault on one of the circuits.
Testing is normally required to identify the cause.
Can I keep resetting a tripped breaker?
A protective device that trips repeatedly should not simply be reset.
Repeated operation may indicate a fault that should be investigated.
How long does fault finding take?
It depends on whether the fault is permanent or intermittent,
accessibility and how many circuits or appliances may be involved.
Will walls or floors need to be opened?
Not usually at the start.
Inspection and testing are used first to narrow down the likely
location and avoid unnecessary disruption.
Will I receive documentation after a repair?
The documentation depends on the repair carried out
and may include a Minor Electrical Installation Works Certificate
or other supporting test records where appropriate.
Fault finding
Need help with an electrical fault?
Describe the symptoms and include photographs where useful and safe.