This is a 200 amp Service electrical panel with the wiring visible, and as can be seen a very unprofessional wiring job. Lots of loose wiring evident in the interior and wires around the panel not secure or stapled.
Wires entering into panel are not secure with plastic sleeves, also allowing mice to get in to the panel, a very poor job.
The holes that electrical panels have to pass wires through must all be either used by the wires or the punch outs should be capped or covered. This mouse got into this panel very recently when the inspection was done. As can be seen, mouse is dead and it was recommended to remove.
Every now and then in this line of business you come across something really special. The picture above is graphic. At one home inspection I came across a dead mouse in the breaker panel. Who knows how long the carcass had been there. The panel had holes for which wires are introduced into the panel , and from there the mouse had entered . Fortunately, limited damage had occurred within the panel. This demonstrates that the electrical panel must be sealed for safety.
Substandard knob and tube wiring will need to be upgraded for insurance companies.