Why does my power keep cutting out randomly?

The most common cause is a loose connection or deteriorating insulation on a cable. These create faults that come and go depending on temperature, vibration, or load.

Is it safe to keep resetting the trip switch?

Resetting once or twice is fine, but if it keeps tripping, stop resetting and call an electrician. Repeated resetting without fixing the fault increases fire risk.

Could it be my energy supplier's fault?

If the issue is with the supply itself (voltage drops or interruptions), your DNO is responsible. But if your consumer unit is tripping, the fault is in your installation and you need an electrician.

Caution

Updated 30 August 2026

Power Keeps Cutting Out Intermittently

Your electricity keeps dropping out and coming back, sometimes multiple times a day.

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What's happening?

Intermittent power loss is when your electricity repeatedly cuts out and either comes back on its own or needs manual resetting. This is frustrating and often indicates a developing fault that is getting worse over time.

What usually causes it?

Loose connection in the consumer unit or at a socket
Intermittent fault on an appliance causing repeated tripping
Deteriorating cable insulation creating sporadic earth faults
Overloaded circuit that trips under heavy use
Faulty RCD that is oversensitive or failing

Is it dangerous?

Intermittent faults can be more dangerous than permanent ones because they are harder to predict. A loose connection can cause arcing and overheating, which is a fire risk. Do not ignore power that keeps cutting out — it is likely to get worse.

Can I fix it myself?

Keep a log of when the power cuts out and what you were using at the time. This helps an electrician diagnose the fault. Check if the same MCB or RCD trips each time. Do not keep resetting it repeatedly without investigation.

When should you call an electrician?

Call an electrician as soon as possible. Intermittent faults are harder to diagnose and the sooner a professional investigates, the lower the risk. If you notice any burning smell, warmth from sockets, or the frequency is increasing, treat it as urgent.