neutral wire

US /ˈnuːtrəl waɪər/
UK /ˈnuːtrəl waɪər/
"neutral wire" picture
1.

中性线

a wire in an electrical circuit that completes the circuit and carries current back to the source, typically maintained at or near ground potential

:
Always connect the neutral wire to the designated terminal.
务必将中性线连接到指定端子。
The electrician checked the voltage between the live and neutral wire.
电工检查了火线和中性线之间的电压。