There are several signs that your electrical system may need an upgrade:
Frequent circuit breaker trips or blown fuses.
Dimming or flickering lights.
Warm or discolored wall plates.
A burning smell or sparks from outlets.
Limited or no availability of three-pronged outlets.
Usage of multiple extension cords.
Older systems like Zinsco electrical panels, or aluminum wiring, may also need an upgrade for safety and efficiency.