How to Install a Double Plug Socket: Step-by-Step

By Plank Hardware | Decorative details for discerning spaces. | Published: 2026-10-30

Category: How-to Guides

Learn how to install or replace a double plug socket safely, with clear steps, common mistakes to avoid, and tips for matching antique brass finishes.

Quick answer

Installing a double plug socket is a straightforward DIY job if you isolate the circuit, check the wiring, and follow the correct terminal connections. Always confirm the power is off before touching any wires.

Why choose a double socket?

A double plug socket gives you two outlets in the same wall box, which is handy in kitchens, home offices, and behind entertainment units. Replacing a single socket with a double is one of the most common electrical upgrades, and it's a job most confident DIYers can handle in under an hour.

Safety first: know your limits

Working with electricity always carries risk. If you're unsure about isolating the circuit, testing for live wires, or identifying the correct terminals, call a qualified electrician. In many regions, electrical work must comply with local regulations—check yours before starting.

Match the finish to your room

If you're upgrading sockets as part of a decor refresh, the finish matters. An antique brass socket pairs beautifully with brass cabinet hardware and warm metallic accents, while a smooth brass toggle switch can tie the whole look together. Choose a finish that complements your existing fixtures.

Step-by-step installation

Isolate the circuit: Turn off the power at the consumer unit (fuse box) for the circuit you're working on. Use a voltage tester to confirm the socket is dead before removing the faceplate. Never rely on the wall switch alone—always test with a voltage tester.
Remove the old socket: Unscrew the faceplate and gently pull it away from the wall. Note the wiring: live (brown or red), neutral (blue or black), and earth (green/yellow). If the wires are loose or damaged, trim and strip them to the correct length. Take a photo of the existing wiring before disconnecting anything.
Connect the new double socket: Connect the live wire to the L terminal, neutral to N, and earth to the earth terminal (or the mounting plate if it's metal). Tighten each screw securely, ensuring no bare wire is exposed. Double-check that each wire is in the correct terminal and firmly clamped.
Secure the socket and test: Carefully push the socket back into the wall box, ensuring wires are not pinched. Screw the faceplate in place, restore power, and test both outlets with a plug-in device. If the socket feels warm or sparks, turn off the power and re-check your connections.

Product spotlight

MAXWELL 3G Two Way Smooth Toggle Light Switch - Brass: This 3-gang brass toggle light switch from the Maxwell family is finish-matched to our brass cabinet hardware and features a solid brass toggle for a satisfying click. If you're updating your electrical fixtures, matching the switch finish to your sockets creates a cohesive, high-end look throughout the room.
MAXWELL 3G Two Way Smooth Toggle Light Switch - Brass