How to install a 220V circuit breaker in a panel ( Do it yourself)

The red and blue bars represent a single phase (residential ) Electrical panel. To wire a 220V circuit, a breaker must attach to both colors(red and blue). Any one color is equal to 120V. A single breaker, or any breaker that connects to one bar is 120V.(110) Peanut breakers allow for 2 circuits to pull off one bar. Where a 2 pole breaker will span both bars, and attach a leg to each bar. The two circuits combined equal 240V(220V). Some appliances that are 220-240, do not require a neutral, and will not have a neutral (White wire). Some electricians use the white for a powered wire when there is no need for a neutral.
(Typically a heat circuit will have a black and white on a breaker)
A Stove on the other hand will use 120V at the clock , so the white will run all the way to the stove, and the wiring in the stove will split the two circuits to meet its needs.


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Changing three wire dryer cord to four wire cord.

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I made this drawing using basic paint. The art is crude but the concept is the same.
1.) Turn dryer around and look for access.
2.) Remove any number of 5/16" bolts/ screws that hold the cover in place.
3.) Some dryers require that you bend the plate up to reveal the connection, others simply remove.
4.) There will be a steel strap that connects the neutral(white) wire to the case. Remove this strap.
(They are one in the same back at the panel, before grounds were placed at all box locations; this was how they insured breaker trip when the cabinet became energized)
5.) Place the green wire at the green screw, or where the strap attached to the frame.
6.) Place the white wire on the center lug
7.) The last two wires attach, individually, on the outer lugs.