I'm using this AC-DC converter (120VAC-5VDC) as a power source for an Arduino-based device.
The AC-DC converter has input pins labeled Neutral and Live. I'm wondering how essential it is to get the polarity right. A quick test showed no difference, and since the output 5VDC is totally isolated, it doesn't seem like it should be affected by the input polarity.
Does anyone know why these are labeled specifically, instead of just "AC in"?