Comments by "George Reynolds" (@karhukivi) on "Voltage Explained - What is Voltage? Basic electricity potential difference" video.

  1. There is no "used" current and no energy levels of electrons involved. Better to think of potentials, the neutral is connected to ground so it has the same potential as "ground" and no current should flow through anyone touching the neutral conductor. The "hot" wire is alternating between +310V to -310V, with an average ("RMS" or "root mean square") voltage of +220V or -220V relative to ground (European system). So if you are standing on the ground (with poor insulation) and touch the hot wire, you will have an alternating current pass through you as the voltage swings up to +310V and then to -310V 50 times per second. Sometimes the neutral is badly connected to earth at the transformer, or the ground is resistive and not at zero potential, or even incorrect wire colours, so touching the neutral conductor is never recommended unless the circuit is turned off, i.e. isolated.
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