This type of pictured circuit-beaker “intelock” is sometimes found in RVs to select between an on-board genset and “shore power.” I am not sure many electric utilities have caught on to this potential death trap. What amazes me is the 2-pole breaker across from a 1-pole breaker—backfeed guaranteed, unless only one pole of the 2-pole breaker is used. On its best day that can’t work without significant hazard to life and property—unless this is a 100% “off-grid” system.

[Linked Image from 64.146.180.232]

{The white left enclosure looks like a Trace inverter accessory—the installation may be for a photovoltaic home-power installation.}