Question: can i use as antenna for my wireless card in pc wires of electricity in home? 

Answer: Wireless card vs wires? It's wireless so you don't need to connect to wires! Primarily the answer is no. Your wireless card is built to have a specific antenna connected to it. \n\nNot only are you playing with a very dangerous theory and assuming you managed to isolate the power with filters, the impedance mismatch would not allow it to work. The power system (electricity) of your house  is connected to the whole world (well perhaps not that big but at least your suburb)! not just your house.\n\nIt is theoretically possible to utilise the power cabling in your house to run a LAN but this would not involve a wireless card; just a NIC, some form of adapter and extensive filtering would be required.
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