How do I convert straight (3 wire) 220v to 2 chain 110v?
220v single phase, is 110 on each side, with a impartial,
if you have a voltage meter set it at voltage, find the neutral touch it beside the black color probe, ,then touch the
other red verbs to one side of the other wire, you should read 110v
find the Ground or neutral, line, that will be the white wire on 110v the other wires will have a black or red covering, that's the hot side of your 110v , put a red or black lead to the gold screw on a duplex outlet, the neutral or white one to the silver screw, and to the ground, Shut the power rotten first ,
Your "additional details" tell me to speak "no". You cannot ADD an additional 110 volt outlet from the existing 220 volt outlet without a separate dull wire. You must have a 3 telecommunication coming from the panel to the 220 volt outlet. Even at that, any load you put on the new 110 volt outlet would put an asymmetrical amp balance at the double pole breaker in the panel.
So, I verbs that you cannot do that. Sorry.
Answers: You have two 110V AC lines and one neutral. Most possible the colors are black, red and white, hopefully a bare copper ground wire is also in attendance. Use the black and white for 110V to your new outlet (or whatever) and ground it with the uncovered copper (if it is there).
Edit: you say you have no independent wire. You can go to your breaker box and money one of the wires going to the second breaker to a neutral wire by connecting it to the nonpartisan bar (you should probably label it as indistinct or pigtail a white wire). Then you would have 110V with ground at your untried outlet.
Wish I knew what gauge you are referring to.but you know you individual need 1hot and 1neutral and 1 ground for 120volts...so black to black , white to white.and red becomes you ground chain..if you have a gound in your 240 telecommunication use it...and just eliminate the third telecommunication..I also strip the whole wire and seperated them and verbs what i need through.and ended up next to a piece I can use for something else later..(pig tail ex.) all the best.hope I fathom out you correctly. Transformer.Or go to breaker box and take the white front off its breaker and move it to the neutral bar(where the other whites are.