Signs Existing Wiring May Need Assessment
Wiring usually sits out of sight, so problems are often noticed through what happens at outlets, switches and lights. Signs that may point to wiring in poor condition include outlets or switch plates that feel warm, discolored or scorched outlets, a burning or hot plastic smell, lights that flicker or dim often, and breakers that trip without an obvious reason.
The U.S. Consumer Product Safety Commission’s guide to home wiring hazards also lists cracked or damaged wire insulation, loose plugs and extension cords used in place of permanent wiring as warning signs. Wiring that has been altered by previous owners, or damaged by pests, water or renovation work, can be a concern too.
None of these signs proves that a property needs rewiring. They do mean the wiring should be inspected so you know what condition it is in and what, if anything, needs to change.