iwire said:
UL simply says they have not tested the use of back stabs and screw terminals together.
This also applies to pressure plate type and their screws
The way I read this you can use back stab and screws together:
Single and duplex receptacles rated 15 and 20 A that are provided with more than one set of terminals for the connection of line and neutral conductors have been investigated to feed branch circuit conductors connected to other outlets on a multi-outlet branch circuit, as follows:
Back wire (screw actuated clamp type) terminations with multiple wire access holes used concurrently to terminate more than one conductor
Side wire (binding screw) terminals used concurrently with their respective push-in (screwless) terminations to terminate more than one conductor
This where you cannot use clamp type with the screws at the same time:
Single and duplex receptacles rated 15 and 20 A that are provided with more than one set of terminals for the connection of line and neutral conductors have not been investigated to feed branch circuit conductors connected to other outlets on a multi-outlet branch circuit, as follows:
Side wire (binding screw) terminal with its associated back wire (screw actuated clamp type) terminal
Multiple conductors under a single binding screw
Multiple conductors in a single back wire hole
The entire guide info can be found here:
http://database.ul.com/cgi-bin/XYV/...n=versionless&parent_id=1073992975&sequence=1