Food for thought from UL White Book" to those of us who do backstab:
"Single and duplex receptacles rated 15 & 20 amp that are provided with more than one set of terminals for line & neutral connections may be used to feed a single set of branch circuit conductors connected to other receptacles on a multi-outlet circuit.
These devices have not been tested for tapping off more than one circuit from the receptacle by utilizing both the side wiring and back wiring terminals on an outlet."
