What Does the Earth Pin Do?

Answer

The earth pin is found in three pin plugs for various reasons. The long earth pin on UK electric plugs enters the socket first to remove a spring-loaded guard which otherwise covers the neutral and live terminals to prevent objects being inserted. Also, the earth pin must be thicker than the other pins because the leakage current or short circuit current that passes through the earth pin will be 5 to 10 times higher than the phase current.
Q&A Related to "What Does the Earth Pin Do"
The term "earth pin" is generally a European term but in the US, the ground prong (same thing) is required to be "first make/last break. It must the the first terminal
http://wiki.answers.com/Q/Why_is_the_earth_pin_in_...
This user continues to post word scrambles that do not resolve into questions. The "small text" in the body shows that these are not real question attempts.
http://answers.yahoo.com/question/index?qid=201203...
That female pin goes on the male directly opposite the existing earth shown on your photo
http://uk.answers.yahoo.com/question/index?qid=201...
Dear Arun, This is really interesting question. There are basically three solid pins: (i) Two pins are equal sized and are neutral and live (connected to phase) pins. (ii) Third
http://en.allexperts.com/q/Physics-1358/2008/1/ele...
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