![]() These designations have nothing to do with inductors, just to make things confusing. L 1 is the "hot" conductor, and L 2 is the grounded ("neutral") conductor. The "L 1" and "L 2" designations refer to the two poles of a 120 VAC supply, unless otherwise noted. If we wanted to draw a simple ladder diagram showing a lamp that is controlled by a hand switch, it would look like this: They are called "ladder" diagrams because they resemble a ladder, with two vertical rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits to represent. Ladder diagrams are specialized schematics commonly used to document industrial control logic systems. ![]() ![]() Lessons In Electric Circuits - Volume IV Chapter 6 LADDER LOGIC Lessons In Electric Circuits - Volume IV (Digital) - Chapter 6
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