Understanding “3 Phase”, and differences between commercial vs. residential electric #electrician

all right Dad what kind of system is this okay so this is a low voltage panel this is a 120 208 volt 3phase four wire system okay okay there's a couple reason I can determine that one when I see these type of Breakers I know these are rated for only 250 volts this is a seens bqd these are not plugged in yeah like residential it's plugin that's called a load Center okay this is a panel board oh okay panel boards are not plugin they're bolt-on got it right the color coating is black red and blue why is that now that's just the the standard color cating for 120 208 240 volt okay right don't get confused with the 277 480 volt which we will do on a later video for you guys got it thanks for the knowledge