If you want "idiot resistant"*, one trick to writing a spec on the Meltric products is that Meltric is the only mfr who's plugs and connectors are UL listed as disconnect devices. All others, including the MIL spec "Cannon" plugs, need to have the power disconnected PRIOR to un-doing the connection.
*There is no such thing as idiot proof, they just make better idiots!
