How to Add a Second Cable Line to Your House


Adding your own second, or third, cable line is easy and relatively inexpensive. Don't wait around for someone else to show up between 9 a.m. and 4 p.m. to install your cable line. Avoid a service fee and do it yourself.

Things You'll Need

  • 1-port wall plate
  • Electricity sensor
  • F-Connector (QuickPort)
  • 4 F-type twist-on connectors
  • Cable
  • Wire strippers
  • Electric outlet box
  • 3-way cable splitter
  • Drill
  • Screwdriver
  • Stapler/staples
  • Small saw/knife
  • Putty/silicone/filler
  • Pick a location along the bottom of the wall near an outside corner of the room where you are going to add the cable. Check the location with an electricity sensor to make sure no hidden electric wires are present. Drill a hole through the wall all the way outside. Make the hole big enough for cable to fit.

  • Hold electric outlet box to wall, centered on the drilled whole, and trace around it. Drill holes along traced area. Take saw or segregated knife and cut from hole to hole. Be sure to only cut the inside wall, not the outside one.

  • From outside of house, push the cable through the hole into the house. Pull through about 12 inches of cable and leave the rest outside.

  • Drill out one "entry" into the electric box.

  • Pull the cable through the hole. Fit the electric box into the hole snugly and apply screws. Using wire strippers, strip ¼-inch from the edge of the cable to the main wire. Remove the outer covering from next ¼ inch. Twist on the connector.

  • Screw into F-Connector QuickPort.

  • Snap the QuickPort into the wall plate. Attach the wall plate to the electric box.

  • Take the cable from outside and run it straight to the edge of the trim. Staple the cable in place and run to either the top or bottom of the exterior wall. Staple it in place and run until you reach an area where you can connect to the existing cable.

  • If your cable is located in the walls of your home you will need to drill through to reach it. Drill from the outside just below where your cable connection is located inside. Using a piece of wire, form a hook. Drag the cable line outside of the wall. Slice the cable and attach the splitter. You can either leave the splitter on the outside of the wall, with two cables returning inside, or cut a wide enough piece of the wall to fit the splitter back into the wall.

  • Add putty, silicone, or some filler around the edges of any holes you make to the outside of your house.

Tips & Warnings

  • Always leave at least 6 extra inches of cable at each end before connecting.
  • Painting over the cable with house paint will help it blend in.
  • A small current of electricity does run through the cable line. Do not place it in your mouth or attempt to hold it with wet hands.

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