Here is mine Safety Concern Old ungrounded receptacles have been replaced with modern 3 prong grounded type receptacles giving the illusion that they are grounded. The original wiring of the house did not provide for grounded receptacles. These new receptacles should be connected to ground, replaced with 2 pong outlets or GFCI receptacles where appropriate. While it is considered acceptable to leave older equipment in place that does not meet modern standards, any item you replace must meet them. Any appliance that has a three-prong plug must be provided with a grounded receptacle for safety reasons.