Why has my consumer unit tripped out completely and won't reset – Advice from Electriman, North London Electricians

## Why Has My Consumer Unit Tripped Out Completely?

When your entire consumer unit goes dead — not just one circuit — it usually means the **main switch (incomer)** has tripped, or in older installations, the main fuse has blown. This is different from a single breaker tripping and is often a sign of a more serious electrical fault.

### What It Means

The main switch is designed to protect your entire installation. If it trips, something has caused an abnormally high current or a fault that the individual circuit breakers couldn't handle on their own. It can also trip if there's a **fault within the consumer unit itself**, such as a faulty busbar or damaged wiring inside the unit.

### What You Can Safely Check

- **Look at the main switch** — is the toggle or rocker in the middle or fully down? This confirms it has tripped rather than been accidentally switched off.

- **Switch off all individual MCBs and RCDs** inside the unit before attempting a reset.

- **Try resetting the main switch** — push it firmly to OFF first, then back to ON. If it holds, turn circuits back on one at a time to identify the problem circuit.

- **Check for obvious causes** — did it trip during a storm (possible surge), after plugging in a new appliance, or during heavy rain (possible water ingress)?

- **Check your electricity meter** — if there's no display at all, the fault may be on the supplier's side. Contact your energy supplier.

### Warning Si

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Electriman covers Mill Hill, Barnet, Finchley, Edgware, Enfield, Watford and surrounding areas. All work is Part P certified and fully insured.