Abstract: An electric outlet assembly having multiple receptacle and contact holder sets mounted in a bottom shell and a top cover shell and adapted to receive electric plugs, the receptacle and contact holder sets each including a contact holder mounted in the bottom shell, three annular metal contact plates concentrically mounted on the contact holder and respectively connected to respective metal contact strips in the bottom shell, and a rotary receptacle mounted in a respective hole on the top cover shell corresponding to the contact holder and rotatable relative to the contact holder, the rotary receptacle having three plug holes, and three metal contact terminals respectively mounted in the plug holes at a bottom side and disposed in contact with the annular contact plates, the metal contact terminals being maintained in contact with the annular metal contacts upon rotary motion of the rotary receptacle relative to the contact holder.

Abstract: An electric outlet includes a casing having a longitudinal row of split bolts on the middle and two longitudinal row of locating blocks at two opposite sides of the split bolts, a grounding strip and two metal conductive strips respectively fastened to the longitudinal row of split bolts and the longitudinal rows of the locating block and respectively connected to the conductors of the three wires of a three-wire electric wire, a plurality of rotary socket bodies respectively and rotatably mounted on the split bolts, each rotary socket body having insertion slots for receiving the metal blade and grounding prong of an electric plug, and a cover shell covered on the casing to hold the rotary socket bodies in place, wherein when an electric plug is installed in one rotary socket body, the rotary socket body can be rotated on the respective split bolt between "ON" and "OFF" positions.