Knob and tube wiring and aluminum wiring are both outdated and potentially hazardous types of electrical wiring that can pose safety risks if they are not replaced. This type of wiring was commonly used in homes built before the 1950s and consists of ceramic tubes that hold wires in place and prevent them from touching each other or any flammable material. However, knob and tube wiring does not have a grounding wire and may not be able to handle modern electrical loads, which can lead to overheating, short circuits, and electrical fires.
Similarly, aluminum wiring was commonly used in homes built in the 1960s and 1970s and is known for its tendency to expand and contract with temperature changes, which can lead to loose connections, overheating, and the risk of electrical fires.
If knob and tube wiring or aluminum wiring is not replaced, there is an increased risk of electrical fires, as well as the potential for electrical shock or electrocution. In addition, these types of wiring may not meet current electrical codes and regulations, which could cause issues during home inspections or when selling the property. You'll still find both types of wiring in quite a few older Peterborough homes, and sometimes they're discovered when a major renovation is being done.
If you suspect that your home has knob and tube wiring or aluminum wiring, it is recommended that you have it inspected by a licensed Peterborough electrician to determine if it needs to be replaced.