I would like to know how to place an armed grenade/mine/explosive device with out actually going up to place it. For example I know how to place an "Item" at a point, which maybe an explosive or what ever, I need it to be in the armed state.
Is there a prefix to the item code or an armed item code? any help.
I am on the PC variant.

Yes, there are ''projectile'' versions of each explosive, which are the ''armed'' version.

For the Frag Grenade, for example, the item is 00004330, while the projectile is 000043F9.

You can get this information in-game, but you'll need NVSE. If you want the projectile's ID number, throw one, open the console, and then click on it. Type in GetBaseObject (or gbo for short, it's an NVSE function) to get the ID number you're after.

Queue

This is awesome, I did get the NVSE, and this is exactly what I was looking for. Thank you.
Around the legion camp, being high up on a hill or other place setting up an ambush is difficult, I wanted to experiment on other tactics by placing bombies (MFC cluster grenades and fat mines) in there paths, as well as other enemies.