Use correctly rated protective devices installed on a sound, earthed electrical system. A plug-in surge strip alone cannot correct bad wiring, sustained over-voltage or unsafe generator changeover.
People call many events a surge: a brief transient, sustained high or low voltage, neutral failure, supply restoration or generator fault. Protection must match the problem.
The essentials
- The appliance voltage and power rating.
- Earthing and protective-device condition.
- Whether the problem is transient surge, over-voltage or under-voltage.
- Generator, inverter and grid changeover arrangement.
What to check first
Start with the evidence already in front of you. A precise account, meter, product or safety detail is more useful than guessing from the outcome alone.
- The appliance voltage and power rating.
- Earthing and protective-device condition.
- Whether the problem is transient surge, over-voltage or under-voltage.
- Generator, inverter and grid changeover arrangement.
Step by step
Work through the existing transaction, account or installation in order. Keep the reference and result from each step before moving to the next.
- Ask a qualified electrician to inspect earthing and the distribution board.
- Use appropriately rated whole-installation and point-of-use protection where required.
- Delay or disconnect sensitive appliances during visibly unstable supply.
- Replace damaged protective devices after a major event.
Mistakes to avoid
These shortcuts often turn a traceable problem into a second payment, a lost evidence trail or a safety risk.
- Daisy-chaining cheap extension strips.
- Using a voltage stabiliser as a substitute for safe wiring.
- Bypassing breakers that trip repeatedly.
When to escalate
Repeated high voltage, burning smells, shocks from appliance cases or neutral faults require urgent professional inspection and a report to the electricity supplier where supply quality is involved.
Frequently asked
Is a surge protector the same as a stabiliser?
No. Surge protection addresses short transient events; voltage regulators or protective relays address other voltage conditions. Product capabilities vary.
Will a surge strip work without proper earthing?
Some protective functions depend on a safe earthing path. Have the installation assessed rather than assuming a plug-in device fixes the system.
Research sources
Official guidance, product information and public sources were reviewed on 27 July 2026.