Physics · Electrical Safety

In a standard three-pin electrical plug connection, what is the core functional responsibility of the longer, thicker third pin?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1It provides physical mechanical support to structural plug pins.
2It establishes early grounding contact to safely shunt fault current to earth.✓
3It functions as an embedded overcurrent protection fuse.
4It operates as an internal manual circuit breaker switch.

Correct answer

It establishes early grounding contact to safely shunt fault current to earth.

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