How to Run Electrical Wire in a House

Although running wires in a house is a relatively simple procedure that does not require specialized equipment, it is always a good idea to learn a few proper safety practices before you begin. Despite the simplicity of the process, wiring a house is still a broad undertaking, as it can involve everything from wiring electrical terminals to replacing a breaker box to installing dimmer switches.

General Wiring

Anyone can undertake house wiring by learning a few basic electrical rules.
  1. Turn off the power before beginning. Use the mains to turn off the power to the entire house.

  2. Prepare the studs for the wire by drilling in right angles and in the center of the studs. An alternative to drilling is to notch, especially where insulation is present and you don't want to compress it.

  3. Connect switches using black wires to designate them as hot. If you need to use white wiring, ensure that you mark them with a black tape to designate them as hot.

Light Switch Wiring

  1. Turn off the power from the mains.

  2. Loop the wire onto the switch screw and tighten the screw to close up the loop.

  3. Connect the copper wire to the green grounding screw.

  4. Close the light switch and turn on the power mains to test the wiring.

Running Wires Through a Wall

  1. Drill the appropriate hole sizes using an electric drill where the cables will be run through.

  2. Use tape connectors to keep cables in line neatly which will allow the cables to be pulled through walls easily.

  3. Attach a straight firm wire to the cable to help in pulling the cable through the wall outlets.

  4. Push the wire carefully through the wall until it comes out on the other side.

  5. Use a super grip mesh when running cables inside rods to toughen the rod insulation and thus offer more protection to the wires.

  6. Use surface wire channels when you need to run wires for additional outlets. Surface wire channels are neat and maintain the attractive appearance of the wall.


  • Always check for the plastic insulation on wires. Hot wires are designated using black, red, blue or yellow marks while ground wires are green or just exposed bare copper. Neutral wires are green or white.