PoHo with spade lugs soldered on and connected to a plate-jumpered railpower distribution Terminal Strip. Green code is Hot, White is Common]
The same on another T-strip with a TVS connected across the Hot and Common.
On the PoHos, when one cuts off the plug and divides the lamp cord type secondary output conductor into its two wires[Hot and Common], the insulated wire with the "telltale" ridge running alongside is the Common and the smooth half is the Hot. And yes,Hot is the middle wire on the factory plug.