Matt,
The UL white book say that "terminals of the wire-binding screw, setscrew, or screw actuated back wired clamping types are suitable for use with both solid and stranded building wires". This is under the "receptacles for attachment plugs" listing. It gives no directions as to how the termination should be made. I prefer to use the back-clamp type of receptacle when using stranded wire, but these are usually somewhat more expensive.
Don(resqcapt19)
