Changing a light switch but there's no ground wire?

I am replacing a regular toggle light switch with one of these just b/c I like the way it looks better...


http://www.homesteadertrailer.com/assets鈥?/a>


This new switch I bought has a green screw for a ground wire but the old switch didn%26#039;t have one %26amp; there is no ground wire. Do I have to have a ground wire? I went ahead %26amp; replaced it without just to see if it worked %26amp; the light does work but I still want to make sure that%26#039;s ok. Thanks!|||Yes it is fine and even by code. The code states that ungrounded systems can use grounded devices with out the use of a ground wire. This just means the device is not grounded and neither is the house if you do not have ground wires. This is the way many homes still are to this day and older homes never used a branch circuit ground.





P S this is for switches and lights only not for receptacles.|||The switch will work fine without a ground, but you have no ground fault protection to prevent you from getting shocked.|||Don%26#039;t worry about it. You don%26#039;t always have the ground in the switch box.|||its good.no problem.