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Originally Posted by Mike Shaul
There is a section on DC Electronics that might be helpful (and related to this thread). |
Everyone should read through Chapter 3, Electrical Safety. I would caution everyone who reads this that illustrations on body contact with neutral wires tied to ground starting on page 95 of the text (105 of the PDF) is not entirely accurate. Even when the "neutral" wire is tied to ground at the source, a fault (internal short) will cause current to flow in the neutral and a voltage will be developed by that current flowing through the resistance of the wire. When a third "grounded" wire is added, the shock hazard remains but the design intent of such circuitry is that the third wire will insure a circuit breaker trip in addition to the limited protection provided.
The text has some very interesting discussions on circuit analysis and general DC electronics with good illustrations.