Power socket in US

Nigel Goodwin · May 30, 2009

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.

Yes, 'FIRE SAFETY' not electrical safety - so from that point of view, the neutral is just as good as the live.

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.

What's a 'class 3' appliance?.

Hero999 · May 30, 2009

An appliance that requires an earth wire.

Nigel Goodwin · May 31, 2009

Hero999 said:
An appliance that requires an earth wire.

That's a class 1 appliance.

Hero999 · Jun 6, 2009

Yes, you're right, class 3 means it's run from SELV (Separated Extra Low Voltage).
Appliance classes - Wikipedia, the free encyclopedia

Nigel Goodwin · Jun 6, 2009

Hero999 said:
Yes, you're right, class 3 means it's run from SELV (Separated Extra Low Voltage).

That's why I've never heard of it then, nothing to PAT test

Power socket in US

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Power socket in US

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