The "Federal Pacific" electric panel is a known fire hazard. The panel has known design and manufacturing defects. I have inspected homes that have caught fire from these panels. If you have one in your home, this panel should be replaced by an electrician.
I searched all over the basement trying to find the main electrical panel. I finally found it behind the mirror that is over the bath sink. Electrical panels are never to be in a bathroom, as per ICC code. It could be a shocking situation.