Is L1 or L2 the Common Terminal on a Light Switch? Explained

Learn the difference between L1 and L2 terminals on light switches and how they control your lighting safely.

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L1 and L2 are commonly found on light switches in many countries. L1 serves as the terminal for the live wire coming from the power source, while L2 is often used for the switched live wire that goes to the light fixture. This configuration allows a switch to control the light by connecting or disconnecting the live circuit. Always turn off power at the breaker before working on electrical switches for safety.

FAQs & Answers

  1. What does L1 mean on a light switch? L1 is typically the terminal connected to the live wire coming from the power source, supplying electricity to the switch.
  2. What is the purpose of the L2 terminal on a light switch? L2 usually carries the switched live wire which delivers power to the light fixture when the switch is turned on.
  3. Is it safe to work on light switches without turning off the power? No, you should always turn off power at the breaker before working on electrical switches to avoid electrical shock or injury.
  4. How do L1 and L2 terminals help control a light? L1 and L2 create a circuit where the switch connects or disconnects the live wire to the light, turning it on or off.

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