I had a problem with some switches in the kitchen that controlled ceiling lights. So I opened up all the boxes that were controlled by the 15/17 breaker set.
The only box that had power from the breaker panel also had a switch controlled by breaker 1. All the other boxes controlled by 15/17 were wired in series with this box. When I took a look at the incoming power wire to this box, it was a 3 wire power with red, black and white. Measurements showed R-B 240 V, R-W and B-W 120 V. My conclusion is that I had a multi-wire branch circuit (MWBC). Please correct me if I am wrong, or if I need to do additional tests to confirm this.
From my research, MWBC's are required or strongly suggested to have breakers that have a common handle that controls both the red and black wires. But when I went down to the panel, there was no red wire. I have a picture of the panel below. Breaker's 15 and 17 are in the off position in the picture.
There was a wire for breaker 15, but there was no wire for breaker 17. In addition, there are 2 wires coming out of breaker 1. If I didn't know any better, it looks like someone took the wire out of breaker 17 and put it into breaker 1.
- Is it OK to put 2 wires into one breaker? My research on the matter is unclear.
- Would there be any reason for someone to move the wire from breaker 17 to breaker 1?
- Should I move the wire in breaker 1 back to breaker 17?
- Any other recommendations are greatly appreciated.