glupson4,777 posts05-09-2020 12:06pm
"....My amplifier and CD player (same brand) came with two-pronged cord and connector on the devices. I am not sure what certifications they have, but they are from a relatively reputable manufacturer. I somehow doubt they cut corners there...."
Equipment that is double-insulated does NOT require a connection between chassis and earth ground. In such cases, a 2-pronged power cord is perfectly acceptable.