How To Wire A Light Switch In Ireland?


Does it matter which wire goes where on a light switch?

The white (neutral) wire connects to the silver screw, or you place it in the back wire hole on the same side of the device as the silver screw. The black (hot) wire goes to the brass screw or into the hole in the back of the device on the same side as the brass screw.

What does L1 and l2 mean on a light switch?

Wiring a One Way Switch The other terminal is marked as L1 and is the output to the light fixture. When you’re wiring decorative light switches such as chrome or stainless steel etc, you’ll find that the switch will also have an L2 terminal which means it’s a two way switch.

Is there a positive and negative on a light switch?

Switches don’t have polarity ( positive and negative ). In this case, it will act like a piece of wire when switched on, and open circuit when switched off.

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What happens if you wire a light switch wrong?

But here’s the catch: If you connect the circuit wires to the wrong terminals on an outlet, the outlet will still work but the polarity will be backward. When this happens, a lamp, for example, will have its bulb socket sleeve energized rather than the little tab inside the socket.

Where does the red wire go on a light switch?

Attach the red wire from the light fixture to the nut at the top left of the switch. Connect the bare copper wire to the green nut at the bottom left of the switch. Push both switches into their boxes and secure them with screws at top and bottom. Turn on your power and test the switches.

Does the black wire go to l1 or L2?

This is the most common type of switch, and is used where a light is controlled from a single switch. The Yellow wire goes in the common terminal, Red in the L1 terminal and Blue goes in the L2 terminal. The Grey wire goes in the common terminal, Brown in the L1 terminal and Black goes in the L2 terminal.

Why does my light switch have 2 red wires?

2 Answers. It sounds as if most of the switches you have been replacing are single pole switches. That is, they make (on) or break off) a single connection from one location. Simple switches use a black (hot) and another wire, usually black, red or blue (switched hot) to make and break the circuit.

Why does my light switch have 3 black wires?

One of the black wires is probably the feed from the breaker box. One is probably a feed to the receptacles. The third one would go to the light. The receptacle wire should be connected to the feed wire along with one terminal of the switch.

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Why is there a red wire in my light switch?

The exact purpose of a red wire for a light fixture can vary. Except in rare cases, it is a hot wire or a switched hot wire. If turning the switch off turns the wire off, the red wire delivers power from the light switch. Note: Never touch wires or their connection points while the circuit is energized.

Can you wire a light switch backwards?

Normal switches only have two poles and cannot be wired backwards. The black wire is the hot wire and a black wires go on each pole. The purpose of a switch is to make and break the hot wire. The white wire is the neutral and is grounded in the breaker box and runs to the load and not through the switch.

What if I have two black wires?

However, if both wires are hot, the reading will be zero. However, if you need to rewire a light switch or a plug socket, you may occasionally come across two black wires. It’s essential that you determine which black wire is hot before proceeding. The easiest and safest way is to use a multimeter to test for current.

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