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The correct wiring method for the power outlet and plug

Issuing time:2017-10-10 00:00

The face of the socket should be left (N) right fire (L) on the ground (E) the correct connection wiring. (Red, yellow, blue), zero line-N (blue or black), ground-E (yellow-green). In the low-voltage power grid with three-phase four-wire transmission power, which has three lines (FireWire) on behalf of A, B, C three-phase, a neutral line N (zero line). In order to ensure the safety of electricity, in the user area to use three-phase five-wire power supply, the fifth line is the grounding protection line PE (ground), one end is near the user area with metal conductors buried in the ground , The other end with the user's ground contact connected, 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 connection of the electrical appliance to the earth.


Proper grounding can improve the overall system of anti-interference ability.


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


Common socket wiring polarity as shown below.


The correct connection of the power outlet plug


Single-phase two-hole socket of the left pole connected to the N line (zero line), the right pole connected to the L line (FireWire); single-phase three-hole socket of the left pole connected to the N line, the right pole then L line, (FireWire 3), the right pole connected to the L1 line (FireWire 1), on the pole E line, the next pole connected to L2 line (FireWire 2).


Where the shell is a metal household appliances are used in single-phase three-wire power plug. 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.


The following two lines are the FireWire (the logo letter is "L" Live Wire), the zero line (the sign letter is "N" Neutral wire), the order is left zero right fire.


If there is no wire in accordance with the standard specifications to wire, then the zero line and the ground is difficult to distinguish. If the power supply has a leakage protector, then plug the socket with electrical appliances, if the trip, indicating that the line of the root line is actually the ground; if not jump, then the right.


Application of the best use of standard specifications of the wire color: A line with yellow, B line with green, C line with red, N line with light blue, PE line with yellow-green.


Single-phase lighting circuit, the general yellow that FireWire, blue is the zero line, yellow and green is the ground. And some places use red that FireWire, black that zero line, yellow and green is the ground line.


FireWire (Live Wire) L is generally red or yellow or green


Neutral (NEUTRAL) N (Neutral) is generally blue


Ground (English EARTH) E is generally yellow-green or black


Three-pole power plug, as shown in the following figure, the housing of the electrical equipment is connected to the ground terminal of the three-pin power plug by wire, which must be inserted into the tri-pole socket.


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