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Question:

(Red, yellow, blue), zero line-N (blue or black), ground-E (yellow-green)

(Red, yellow, blue), zero line-N (blue or black), ground-E (yellow-green)

Answer:

in the user area to use three-phase five-wire power supply, the fifth line is the grounding protection line (ground), one end is near the user area with metal conductors buried in the ground
May 9, 2017
The other end connected with the user's ground contact, from the role of ground protection. The ground wire is a good way to prevent the electric shock accident by connecting the equipment or the electrical connection of the appliance to the earth.
May 9, 2017
Single-phase three-wire socket, the middle of the ground wire, but also for positioning, the other ends were connected to the line and the zero line, the wiring
May 9, 2017
sequence is left and right, that is, the left side of the zero line, the right side of the line of fire.
May 9, 2017

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