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Answer for UK, Europe and countries running a 50 Hz supply service.

In basic many countries don't use these and therefore need an adaptor

Cost more to make

Uses 33% more metal than 2 pin plus

However,

The 3 pin plug is considerd safer as its fuse carrying and fuse is load dependant, easy change of fuse and it carries an earth cable from the appliance in to the ring main so is safer

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10y ago
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BENEDICTA OKYEREWA B...

Lvl 2
2y ago

If it's not three pin it can electricute the person causes got no earth wire for it to be

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Wiki User

14y ago

-- bent or broken pin in the front

-- solder-blob short in the back

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Q: What are the disadvantages of a 3 pin plug?
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