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Question:

We use the power outlet are mostly single-phase three-wire socket or single-phase two-wire socket

We use the power outlet are mostly single-phase three-wire socket or single-phase two-wire socket

Answer:

Where the shell is a metal household appliances are used in single-phase three-wire power plug
May 9, 2017
Three plugs are positive three-shaped arrangement, which the longest and thickest copper plug is the ground (Earth wire), the ground has a special grounding symbol.
May 9, 2017
The following two lines are the neutral line (the sign letter is "N" Neutral wire), FireWire (logo letter "L" Live Wire), the order is left and right fire, (the back of the plug against himself).
May 9, 2017
AC wire strikes zero line then it does not affect the use of electrical appliances.
May 9, 2017

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