The first step in replacing wiring is deciding how much you will access the walls.If your house is newly purchased, before you paint or move in, plan on cutting numerous holes in the walls to make running the new cable easier.The approach you take will depend on your budget, your ability to access the walls, attic, and crawlspace and the level of demolition allowed.This kind of remodeling is easier to do in a newly purchased home than a well lived-in one.“Aluminum wiring connections often loosen up over time,” says Greg Fletcher, a master electrician, educator, and author of several books on wiring.“That can cause overheating and possibly fires at receptacles when appliances are plugged in to them.” An inspection can determine whether it’s safe to leave the wiring in place.
Replacing electrical wiring is part of making an old house safer, more modern and more livable.
Since the mid-1960s, the electrical code has required a third slot for an equipment ground, which adds shock and fire protection.
The best way to get this protection is to run that third wire, which is usually bare copper or wire with green insulation, from the outlet box back to the grounding bar in your main electrical panel.
Make all the electrical connections inside the electrical panel. Feed the house circuits into the panel, making sure each cable passes through a cable connector. Connect the bare-copper ground wires and white-insulated wires to the ground and neutral bar inside the panel.
Run the main ground wire from the bottom of the electrical panel to the copper water main. Have the utility company reconnect the electrical cables to the exterior of the house.