I am replacing a 3 prong wall plug outlet receptacle with a new one that also has USB ports built in. The old outlet had 2 black wires and 2 white wires attached and a ground wire. The New outlet has only one screw for black and one for white. Should i pigtail both blacks together and both whites together? Thank you for your advice.
Look at each side of the old outlet. There will be copper tabs connecting the two screws that can be broken off. If the tab is intact, then connect them together.
If the tab is broken, connect to only one of the wires and leave the other disconnected (put a wirenut on the wire. Make sure the nut is small enough to grab onto the wire securely). Make sure to use the wires from the same top or bottom of the outlet.