What is this?
Outdoor sockets in the UK must be specially rated for external use (IP66 rated) and must have dedicated RCD protection. When an outdoor socket stops working, it is often because the RCD protecting it has tripped — outdoor installations are more prone to moisture ingress, insect activity, and cable damage from garden tools. External sockets may be on their own dedicated circuit or connected to an indoor circuit, depending on the installation.
Common causes
- RCD or MCB for the outdoor circuit has tripped at the consumer unit
- Moisture ingress into the socket or its weatherproof enclosure
- Cable damage from garden tools, rodents, or ground settlement
- The weatherproof cover is broken and water has entered the socket
- GFCI (RCD) trip caused by a faulty outdoor appliance like a lawnmower or pressure washer
Is it dangerous?
Outdoor sockets carry additional risk because they are exposed to weather and are often used while standing on wet ground. A faulty outdoor socket can be more dangerous than an indoor one. If the weatherproof enclosure is damaged and water is visible inside the socket, do not touch it — turn off the circuit at the consumer unit from inside the house.
Can I fix it myself?
Check the consumer unit for a tripped RCD or MCB and try resetting it. If it trips immediately, there is a fault on the outdoor circuit. Check the outdoor socket enclosure — is the cover intact and closed properly? Is there any visible water inside? Unplug any outdoor appliances and try resetting again. If it stays on with nothing plugged in, one of your outdoor appliances may be faulty.
When to call an electrician
Call an electrician if the circuit trips with nothing plugged in, if there is visible water or moisture inside the socket, if the weatherproof enclosure is damaged, or if you suspect cable damage (especially after digging or heavy garden work).
What will an electrician do?
Inspect the outdoor socket and enclosure for water damage
Test the circuit for insulation resistance and earth faults
Check the underground or external cable route for damage
Replace the socket and weatherproof enclosure if compromised
Test the RCD protection to ensure it meets the 30mA 30ms requirement for outdoor circuits
Typical cost
£80 – £220
Socket and enclosure replacement is at the lower end. If buried armoured cable needs replacing, costs increase significantly.
