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 - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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