Electrical electrics 2 lead past its sell-by date of 3 line? I have a live rope in my subterranean vault that is only...

I have a live rope in my subterranean vault that is only dangling with rope nuts on the wires. It is a 3 wire cable w ground. I also own a wire I disconnected when remodeling that feed an outlet and ceiling light. This be a 2 wire near a ground. Can I use a junction box to tie the two cable together to get power rear legs to my outlet and ceiling light? Would I a moment ago put a wire nut on the extra chain from the 3 wire cable? I'm assuming this would be the color lead that the 2 wire doesn't hold.
Thanks!
What should I do/make beside my 6ft by...
Answers:    We only hold 120 or 240 volts in AMERICA, THAT'S 120 OR 240
Each leg carry 120 Volts
What is this 110 you speak of ?
If its a 240 line that breaker amp is at least possible 30 and you will burn your house down, if its a green wire than yes but formulate sure its a15 or 20 amp breaker, if 20 amp than make sure both cable are 12 Gage. Don't hook up a 20 amp breaker with 12 Gage lead tieing into a14 Gage wire or you will burn your house down.
Tile experts. HELP !?
yes simply tie off the red