During major remodeling projects you can do this by removing the drywall and running cables through studs and ceiling cavities but in other situations it is neither practical nor desirable to remove drywall it.
Running cables in plaster walls.
If you can run cable through a basement garage or attic you ll avoid tearing into walls or ceilings.
Running wires through interior.
The worst cable runs occur when walls do not line up from floor to floor or you have to sidestep heavy beams and posts.
How to run wire through the studs behind a wall.
How to bury armored cable.
Finding the best route from the existing cable to the destination.
Electrical wiring in the home is usually located in ceilings and attics under floors and through interior walls.
The metal will protect the wires from nail punctures with this method but care should be used when nailing baseboards to avoid hitting.
In a room with old plaster of at least inch thickness an armored cable or greenfield can usually be run under the baseboard by chiseling a channel along the floor wide enough to bury the metal casing flush with the wall surface.
Cabling can be difficult to run at the best of times but what happens when you drill a hole in a plaster wall with the intention of running a cable from the roof cavity down to this hole and find it filled with insulation.