Power socket in US

Hero999 said:

That's true for class 2 appliances (two core, no earth required) because there's no chance of one of the conductors from coming in contact with earth, the only risk of short circuit between the conductors.


It is for the safety of the user. The fuse protects the cables from overheating and catching fire.

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For a class 3 appliances it makes a huge difference. The fuse must always be in the live conductor otherwise there's little point in having it.

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Hero999 said:

An appliance that requires an earth wire.

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Hero999 said:

Yes, you're right, class 3 means it's run from SELV (Separated Extra Low Voltage).

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