How to Safely Connect Electrical Wires at Your Home

These instructions get you right down to electric avenue

Close-up of a technician's hands connecting wires to a wall socket opening, focusing on the delicate wiring process against a white wall.
Photo: Ian Tuttle / Angi
Close-up of a technician's hands connecting wires to a wall socket opening, focusing on the delicate wiring process against a white wall.
Photo: Ian Tuttle / Angi
C.E. Larusso
Written by C.E. Larusso
Contributing Writer
Updated Apr 9, 2025
SKILL LEVEL
Simple
COMPLETION TIME
1 hour
COST
$50–$100
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What you'll need:
TOOLS
  • Wire stripper
  • Screwdriver
  • Pliers
  • Rubber boots
  • Rubber gloves
SUPPLIES
  • Wire connectors/nuts
  • Screw terminal (optional)

If you’ve finally decided to swap out those 1980s light fixtures with something more modern, you’ll need to learn to do some light electrical work. The process of connecting electrical wires is a DIY-friendly electrical task that’s perfect for a lazy Sunday afternoon. Provided you’re working with a single-pole switch or other basic set-up, all you'll need are a few tools and supplies, and a little concentration.

Prepping to Connect Electrical Wires

Before you can start connecting electrical wires, it’s important to take a few safety precautions and ensure you are working with the correct materials. 

Turn Off Main Circuit Breaker

Before performing any electrical work, you should always shut off the main circuit breaker. The breaker panel is usually located in a basement, garage, or utility closet and is hidden by a gray or brown metal door. Inside, you will see switches for the different circuits that control the flow of electricity in your home. The main circuit switch should be on top and is usually much larger than the others. If you feel comfortable, you can switch off just the circuit for the area where the fixture you're working on is located, but make sure to test the power in the room before proceeding to confirm that it is definitely off. As an additional safety measure, wear rubber gloves and rubber shoes, as rubber can act as an insulator and prevent electrocution.

Check Wire Nuts and Wires

Next, you need to ensure that the wire nuts you have are adequate for the number of wires you wish to join and for the wires you're working with. The connectors come in different sizes, and the packaging should indicate the minimum and maximum number of wires that it can accommodate. If the package doesn't provide this information, you should check the manufacturer's website.

Connectors, terminals, and lugs have a rating that indicates the type of wire material they are made for, such as CU for copper or AL for aluminum and copper clad/aluminum. Some connectors are marked with "CU/AL," indicating that they are suitable for use with either copper or aluminum wires.

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  1. Strip the Wire Ends

    Man striping the insulation of wires
    Photo: PavelRodimov / Plus / Getty Images

    Using a wire-stripper (ideally, a two-in-one stripper and cutter), strip the ends of the wires you wish to connect. Some wire-strippers sold now double as wire-cutters, which could be handy to have around. Each connector should indicate, on its packaging, how much of the wire you should strip, generally ranging from 1/2 inch to 5/8 of an inch. If you’re working with stranded wire, strip it 1/8 of an inch more than the solid wire.

    Be careful not to damage the wire when you strip the ends; a nicked wire can create a hotspot when the circuit is loaded which, over time, will loosen the connection.

  2. Attach the Wire Connectors

    Electrical switch wiring
    Photo: viavado / iStock / Getty / Getty Images

    With the same color wires (black/hot with other black/hot and white/neutral with other white/neutral) held parallel with their ends aligned, place the wire connector on top of the wire. Next, twist the connector clockwise to allow the wires to wrap around each other. Check that each wire is secure.

  3. Connect Wires to the Screw Terminal

    American woman fixing light switch
    Photo: Jose Luis Pelaez Inc / DigitalVision / Getty Images

    Another option is to connect the wires to a screw terminal, which contains a screw to connect the wire to the conductor. These usually exist on light switches and other single-pole electric connections in your home. To make the connection this way, make sure the wire is stripped as we described before, usually just 3/4 of an inch. 

    Using pliers, bend the stripped area into a clockwise loop. Hook the wire under the screw and create a tight loop around the screw. Tighten the screw with a Phillips or flat head screwdriver, whichever is required for your receptacle, and repeat for each wire connection. 

    If you are working with a three-pole switch or something more complicated, it’s wise to consult a local electrician. Most light switches are single-pole switches with two terminals.

Should You DIY Electrical Wire Connections?

Simple rewiring projects, such as changing a light fixture, are relatively easy for the DIYer to complete, provided you take the safety steps we outlined earlier in this article. More complicated electrical work should be done by a professional electrician near you; these experts have many years of on-the-job training and are familiar with the inner workers of three-way terminals, circuit breakers, and more. The cost to hire an electrician is $50 to $100 per hour, on average, though many have minimum fees; it makes sense to bundle all your electric projects for their visit to save money.

Frequently Asked Questions

With AC wiring, which is the kind most likely you’ll find at home, the black wire is “hot,” and the white is “neutral.” The bare or green wire is considered the safety ground wire. If you encounter DC wiring, it’s relatively easy to tell positive or negative wires apart. red wires are used to indicate positive voltage and black wires indicate negative voltage.

Many wire nuts can accommodate three wires of various gauges; you should check the packaging of the nut to confirm you are buying the correct size. In addition, there are screw terminals that accommodate various numbers of wires; these might also be called “terminal blocks,” and exist to connect multiple wires. 

Black is the standard color for hot wires, which transfer electricity to your outlets and switches. Red wires are also hot wires. White (and sometimes gray) wires are considered neutral, delivering power back to the panel. Finally, green wires, which are sometimes bare copper, are ground wires, used to ground an electrical circuit and prevent electrocution.

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Learn more about our contributor
C.E. Larusso
Written by C.E. Larusso
Contributing Writer
A professional content writer, C.E. has written about all things home, family, and wellness for a variety of publications, including HomeLight, Noodle, and Mimi. A third-generation Los Angeleno, she is always looking for ways to make the most of the sun, whether it be building an urban garden or decorating with the help of some low-maintenance, air-purifying plants.

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