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Is it AC or DC?
You can describe electrical current as being either of the following: Direct (DC): The electrons flow one way through a wire or circuit. Alternating (AC): The electrons flow one way, then another, in acontinuing cycle. Household electrical systems in the U.K. and operates at about 230 volts AC. This significantly high voltage can, and does, kill. You must exercise extreme caution whenever you work with it. Until you become experienced working with electronics, you’re best off avoiding circuits that run directly off household current. Stay with circuits that run off standard-size batteries, or those small plug-in wall transformers. Unless you do something silly, like lick the terminal of a 9-volt battery (yes, you get a shock!), you’re fairly safe with these voltages and currents. The main danger of household current is the effect it can have on the heart muscle. High AC current can cause severe muscle contraction, serious burns, or both. And many electrocution accidents occur when no one is around to
help the victim. Burns are the most common form of injury caused by high DC current. Remember that voltage doesn’t have to come from a souped-up power plant to be dangerous. For example, don’t be lulled into thinking that because a transistor battery delivers only nine volts, it’s harmless. If you short the terminals of the battery with a piece of wire or a metal coin, the battery may overheat — and can even explode! In the explosion, tiny battery pieces can fly out at high velocity, burning skin or injuring eyes. |
AC High voltage kills
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This intel was contributed by Puniksem
Puniksem
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May, 2012
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