Good Day, I am thinking the opposite from this last entry (JM) but have no background in electrical theory. I have a lot of appliances I plug/unplug w/a little box in-line (I assume "transformer"). Some of the appliances are expensive (e.g., laptop computer).
Is it better for my appliance to plug into the wall receptacle and then into the appliance or the opposite?
I have never heard it matters whether the "power supply" (converts mains ac to lower voltage DC) is plugged into the appliance first or into the mains electric receptacle first.
A theoretical speculation could be that the power supply would generate damaging transients when it is first plugged into the mains power, but if they would do this, then when the power was interrupted it would damage the appliance.