240 is single phase from one side of the hot incoming service to the other. It is also single phase to neutral, but 120 volts. When looked at from the 120 volt point of view, there are 2 branches that are out of phase to each other. When loading the distribution breaker panel, every other 120 breaker from top to bottom is on the opposite branch. When a 240 load is connected, the double breaker attaches to both branches automatically. Best practices splits the intended heavier 120 circuit breakers so they are on opposite branches. Keeping the applied load balanced to reduce the load on the neutral, and share the load through the mains. Jim
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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