| 摘要 |
A grounding-type plug adapter is externally provided at a first side with three slots for a three-pin plug to correspondingly plug thereinto, at a second side with a hot and a neutral blade having respective fixed polarity, and at a third side with a ground screw for screwing against a grounding wire, a checking device, and a testing device; and internally provided with a protective element connected to the ground screw, the neutral blade, and the checking device, and a resistance connected between the checking device and the testing device. The plug adapter is workable when the hot and neutral blades are correctly plugged into corresponding hot and neutral slots on a city electricity receptacle, and is able to lead induced current and leak current produced by an electric appliance to a grounding wire of the city electricity receptacle to protect the user's health and avoid electric shocks.
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