Direct Current Circuit.
Direct Current.(DC) Is one that flows always in the same direction.
Alternating Current Circuit
Alternating Current(AC) Is one that the direction of which is reversed at regular intervals.
Series Circuit.A Series circuit is one in which all components are connected in tandem. The current at every point of a series circuit stays the same. In series circuits the current remains the same but the voltage drops may vary.
Parallel circuits are those in which the components are so arranged that the current divides between them. In parallel circuits the voltage remains the same but the current may vary. The circuits in your home are wired in parallel.
Second Phone Line
The Phone junction box is usually located on the outside of the house or in the basement. The green and red wires are for the main line and a second line is usually black and yellow.
Step up and Step down Transformers.
The transformers below are rated for 1.2 KVA. to show the amperage change with different voltages. The advantage of the 240 volt 5 amps is that it will allow smaller sized wires to be used than the 120 volt 10 amps.
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