i am adding 3 rceptacles for tv's. can i add all 3 to the same circuit and can i just make a splice in the attic

 

You can add all three the the same circuit: (1) if that circuit does not serve receptacles in a kitchen, dining room, bathroom or laundry area, and (2) if that circuit has excess capacity. It would be wise to figure out what all is on this circuit now. It would be a bummer to have three new receptacles but blow the breaker all the time.

You can make splices in the attic if you make them in permanently accessible junction boxes. The trouble is often that if you cut into a cable, it won't have enough slack to make the connections. You are supposed to have at least six inches of any cable inside the box. Often this means adding two boxes, with a length of cable between them, to get the required slack.

But watch out: I can't tell you how many times people have cut into an inappropriate cable. Make sure you know where both ends of the cable go. Don't cut into a 240-volt cable, a switch loop (it's important that you understand what this is), a traveler cable, or a switched cable. If you do, you'll really be disappointed.

 

Personally, I'd recommend running a new circuit from your breaker panel. But if you must tap into a circuit in the attic I strongly recommend you follow John Nelson's advice carefully. I have seen some really scary splices in attics. Also, if you're new to this I'd recommend one of the Sunset basic home wiring books at your local Lowes or Home Depot type place. About $8 - $11. Very good illustrations, advice on connections, hardware, etc. If you're already experienced you should have no problem understanding John's advice and the reasons behind it.

Hope that helps.

Juice