Our refrigerator went out last week and when moving the frige out we discovered that the outlet was cracked, so I decided to replace it. Despite it being 3 prong, there was no grounding wire mounted nor available. Its funny, the rest of our house has the grounding wires when I've looked, how serious is this issue? I replaced the socket with another 3 prong, but again, its not grounded... Is this going to be a safety issue??