So in order to prevent the electrification by friction and having fire, it can transfer the charge to the earth timely,in case of that, we need to add some stainless steel wire in the carpet: When people walk on the carpet and the stainless steel is a conductor, so the friction of soles and the carpet will produce electric charge: due to the electrification friction and stainless steel is a conductor, so it will produce more and more charge and easily cause fire if the charge does not transferred in time.
