How to Reset a Tripped RCD: A Step-by-Step Guide

What is an RCD and Why Does It Trip?

An RCD (Residual Current Device) is a life-saving safety device that automatically switches off electricity when it detects a fault. It's designed to protect you from electric shock and reduce the risk of electrical fires.

Common Reasons Your RCD Trips

• Faulty appliances - A damaged cable or water ingress in an appliance
• Overloaded circuits - Too many devices on one circuit
• Moisture or damp - Water entering sockets or switches
• Old wiring - Deteriorating insulation in older properties
• Worn RCD - The device itself may need replacing

How to Reset Your RCD Safely

Step 1: Unplug All Appliances

Before attempting to reset, unplug all appliances from the affected circuit. This helps identify if a faulty appliance caused the trip.

Step 2: Locate Your Consumer Unit

Your consumer unit (fuse board) is usually found under the stairs, in a cupboard, or in the garage.

Step 3: Identify the Tripped Switch

Look for the switch that's in the "off" or middle position. RCDs are usually larger switches on the right side of the unit.

Step 4: Push the Switch Up

Firmly push the RCD switch to the "on" position. If it stays up, the issue may have been temporary.

Step 5: Reconnect Appliances One by One

Plug in each appliance individually. If the RCD trips again when you plug in a specific appliance, that appliance is likely faulty.

When to Call a Professional Electrician

You should call a qualified electrician if:

• The RCD won't stay on after resetting
• The RCD trips repeatedly with no apparent cause
• You notice burning smells or scorch marks
• The RCD trips immediately when you reset it
• You're unsure or uncomfortable working near your fuse board

Why Choose Grant's Electrical Solutions?

As qualified electricians covering Devon and the South West, we offer:

• Same-day emergency callouts across Exeter, Torquay, Plymouth, and Newton Abbot
• £10 million public liability insurance for your peace of mind
• Fixed-price quotes with no hidden charges
• BS 7671 compliant work every time

Frequently Asked Questions

How often should an RCD be tested?

You should test your RCD every 3 months using the test button on the device. This ensures it's working correctly.

Can I replace an RCD myself?

No. Replacing an RCD is notifiable work under Part P of the Building Regulations and must be carried out by a qualified electrician.

What's the difference between an RCD and MCB?

An MCB (Miniature Circuit Breaker) protects against overloads and short circuits. An RCD protects against earth faults and electric shock.

Need help with a tripping RCD in Devon? Call Grant's Electrical Solutions on 01626 374 059 for expert assistance.