7 ms·You can still plug a 2 prong cord into a grounded cord.by 14 4y agoYou can still plug a 2 prong cord into a grounded cord.toast0 4y agoThree prong males won't always fit into two prong females. It would depend on the molding on the christmas lights.14 4y agomy bad I am now realizing the scenario we are talking about. Disregard my no sleep reply.