Funny thing is when I looked at the P&S web site for the specs on the regular side terminal receptacle they said solid cu and copper clad only.

Quote
Side wire accepts #12 - #14 AWG solid wire.
Push wire accepts #14 AWG solid only.


http://www.legrand.us/passandseymour/duplex-outlets/standard/3232w4.aspx#spec


Greg Fretwell