When I purchased our house the previous owners recently installed electric baseboard heaters in rooms A, B and C. I did not want to keep these but needed more outlets so I had swapped the breaker at the panel so I could run 110 volt instead of 220 volt.
Originally the feed line (from the panel) ran from the panel to the heater in room A. It was then spliced directly on the unit and a line ran to rooms B and C. After removing the baseboard units I ran the feed line to the outlet in room A. I ran a line from the outlet to a junction box, then spliced in the lines that go to rooms B and C.
Last night, one of the outlets that is connected at the junction box stopped working, then started working but received very little power. I immediately cut the power to the line at the panel. The other two outlets were working properly. It was really late so I didn't dig into the problem too much but did verify that the connections at the outlet were tight. I am assuming the problem is somewhere in the junction box.
Since the lines were originally running 220 they used some 12/2 wire. When I put in the junction box I had a hard time getting a good twist on the wires before putting on a wire nut and was worried that at some point they would come loose. I am pretty sure I used the red wire nuts which I think should be the correct ones, right? I don't think wrapped them in electrical tape but should I? Any tips on how I can keep this from happening again?