What poles do n and l on the electric plug represent respectively?

The meanings of n and l on the electrical plug are respectively:

Fire line (English line) "L" stands for phase line, usually red line.

Neutral "n" stands for neutral, usually blue.

Earth (English) "E" or "PE" stands for ground wire, which is usually a yellow-green line.

The letters on the electrical plug represent the meaning and position determination: the right zero and the left fire are grounded, that is, the wiring from the jack to the right side of the socket is marked with "N", indicating the zero line; The connection mark of the left jack is "L", which indicates the phase line; The middle jack marked with "E", "PE" or "〨" indicates the ground wire.

The letters on the electrical socket represent the meaning and position determination: the left zero and the right fire are grounded, that is, the socket wiring facing the left side of the socket is marked with "N", indicating the zero line; The connection mark of the right jack is "L", which indicates the phase line; The middle jack marked with "E", "PE" or "〨" indicates the ground wire.

According to the Code for Acceptance of Construction Quality of Building Electrical Engineering (GB 50303-2002), the implementation date is June 2002 1? Installation of switches, sockets and fans? 22. 1.2 socket wiring shall meet the following requirements:?

Single-phase two-hole socket, which is opposite to the right hole or the upper hole of the socket, is connected with the phase line, and the left hole or the lower hole is connected with the zero line; Single-phase three hole socket, the right hole facing the socket is connected with the phase line, and the left hole is connected with the zero line.