If you don’t know when your wiring was last inspected, it’s worth paying a licensed electrician to give it a once-over, especially if you have any of these warning signs: Instead of the standard copper wire, many houses built in the 1960s and early 1970s have aluminum wiring, which is considered a safety hazard.“Aluminum wiring connections often loosen up over time,” says Greg Fletcher, a master electrician, educator, and author of several books on wiring.To handle increased electrical loads, it’s likely you’ll also need to upgrade electrical wiring, especially if your house is more than 40 years old.Upgrading your electrical wiring is a big job because the wires are located inside of walls, where they are difficult to get at without opening up walls.
Rewiring can be a messy and expensive proposition, but with a little upfront planning you can minimize the disruptions and even turn the job into an opportunity to add features that will increase the value of your home.
But modern homes may need as many as 200 amps to run air conditioners, computer equipment, high-definition televisions, and high-tech home automation devices.
The cost of upgrading your existing electrical service panel to a 100- or 200-amp panel is 0 to ,000.
Old wiring—even knob and tube wiring that dates back to the early 20th century—isn’t inherently dangerous, but unless you were around when the house was built, you can’t be sure the electrical system is up to code.
Plus, materials such as wire insulation can deteriorate over time.