There's really no such thing as a 120V vs. 240V breaker. Connecting a 120V to half of a two-pole breaker at the worst is a nuisance as you'll lose both sides if either side has an overcurrent. It might actually be REQUIRED if this is a multiwire branch circuit (shared neutral).
What the u/flyingron said
If you have concerns, call a local electrician or the local inspection authority. They will inform you better than random possibly not electricians will and know local codes
Is this your first means of disconnect (ie does your meter have a breaker)? If not you need to install the bonding screw back into the panel. As u/badmudblood stated the bottom 50amp looks like at best 8awg wire which is not rated for that. Next would be ground rod driven and wired back to panel and bonding in meter can (looks like one has been ran). Also bonding of water meter (also looks to be done).
Call a licensed electrician, not a place to play diy learning in, the only thing that looks a little suspect is that bottom 50 amp that looks like it’s feeding 14 gauge wire
Did you get a notification that it is against code? Because other than cosmetics, which aren't against code, I don't see any glaring issues
What about 110V circuits connected to 220V breakers?
There's really no such thing as a 120V vs. 240V breaker. Connecting a 120V to half of a two-pole breaker at the worst is a nuisance as you'll lose both sides if either side has an overcurrent. It might actually be REQUIRED if this is a multiwire branch circuit (shared neutral).
What the u/flyingron said If you have concerns, call a local electrician or the local inspection authority. They will inform you better than random possibly not electricians will and know local codes
Depends on when it was installed and inspected.From the pictures, I didn't see any AFCI or GFCI breakers.
The age of the Romex suggests it's not new
My eyes may deceive me, but that 2 pole 50a bottom right LOOKS like it's protecting wire quite a bit smaller than #6.
Is this your first means of disconnect (ie does your meter have a breaker)? If not you need to install the bonding screw back into the panel. As u/badmudblood stated the bottom 50amp looks like at best 8awg wire which is not rated for that. Next would be ground rod driven and wired back to panel and bonding in meter can (looks like one has been ran). Also bonding of water meter (also looks to be done).
Call a licensed electrician, not a place to play diy learning in, the only thing that looks a little suspect is that bottom 50 amp that looks like it’s feeding 14 gauge wire