shloob on 18 October 2013
Yes the center hole is simply where the ground would go. The neutral is more or less also a ground so there is no need to use the center slit. You will be fine if use it. Unless you plan on bear hugging it during a short and never letting go 120v won't kill you, Just simply give you a little tingle. Typically there is a hot, neutral, and ground. You can touch the hot all day and never get shocked as long as you arent touching the neutral or something else that is grounded. It is when the two are together that you will get 120. On a two prong one is simply a hot and a neutral. On a 3 prong it is simply a hot a neutral and a ground. The neutral is in fact actually a ground, and the ground is actually a back up for safety purposes.
