I Have An Electrical Box I Would Like To Install (2) Switches In. The Box Has 3-white , 3 Black And Three Grounds Conbined In To Single Ground Wire. I Want To Install Two Switches Side By Side. I Have Checked The Wires As Instructed To Check For Power , However , None Of The Wires Appear Alive. Any Help?
Telling us what you intend to do is a good start.
What are you trying to switch?
Is this a two gang box?
If there is no power on any of the wires then you need to find out why. There is probably a bad connection upstream of this box. Unless you are capable and willing to start opening up boxes and checking connections this might be a good time to call in an electrician.
Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.
Answers based on the 2008 & 2011 NEC. If you're on the '14 already I feel sorry for you.