Looking for some help with the Sony 65A85 I purchased last week. The power cable supplied is a 2-pin (pretty much kettle lead) as far as I can tell, 2m in length.  10amp, 250v.  I've put a picture below.  All other kettle leads I can see though have 3 pins, the extra being the earth pin.  

I need a 3m cable so I hide the cable in the wall. My question is: can you use a regular 3-pin kettle lead? Or where do I get a longer 2-pin version.  

Thanks