In a wiring diagram, L1-L3 stands for?

• A. Terminals 1-3.
• B. Lines 1-3.
• C. Links 1-3.
• D. Lanes 1-3.

Answer: (B)

L1-L3 identify the live conductors of a three‑phase power supply. The L stands for line, and the numbers distinguish the three separate hot wires that carry the alternating power to the equipment. This labeling makes it easy to trace the power path through components like motors and control devices, and it helps separate the supply lines from other connections such as neutral (N) or earth/ground (PE). Other terms like terminals describe specific connection points on equipment, and links would be jumpers or bridging wires; lanes isn’t a standard term in wiring diagrams. So L1-L3 stands for the three line conductors feeding the circuit.