I have a home appliance that should be plugged into one single wall socket because it's energy consuming, and shouldn't share with other appliances by common sense. However, due to some practical problems, I can't plug it directly into the wall socket. If I use a power extension board (i.e. 1 to 2 or 3 or 4...) to serve as an intermediate, while all other sockets on the extension board are not used. Is it scientifically the same as it directly plug into the main wall socket?