Churning with voltage and resembling an explosion at the wire factory ... This is the on/off switch to the entire breaker panel. A 200-amp breaker is appropriate for a home upwards of 2000 ...

The photo below shows a wire that is only rated for 15 amps connected to a 30 amp fuse. Oftentimes, several wires will be connected to a single fuse lug, but each fuse is supposed to have one wire.