The faceplate of a single, one-way switch has two terminals: "L1" is the terminal to which the neutral core wire is attached - the blue wire (traditionally black, before the change). "COM" or "Common" is the terminal to which the live core wire is attached - this is the brown wire (formerly red).
UK Three Phase Wiring Colours:
Line L1 = Brown. Line L2 = Black. Line L3 = Grey. Neutral = Blue.
Live wire colour
Nowadays, the standard indicates that, in single-circuit installations, the colour brown should be used. This cable is labelled as L. This colour also identifies the first live cable (L1) in a three-circuit installation, the following cables being black (L2) and grey (L3).
The green wire on the four-wire cord is ground. Black is L1 or line one. White is neutral. And red is L2 or line two.
The faceplate of a single, one-way switch has two terminals: "L1" is the terminal to which the neutral core wire is attached - the blue wire (traditionally black, before the change). "COM" or "Common" is the terminal to which the live core wire is attached - this is the brown wire (formerly red).
L1 is the hot wire. It carries 120V to the components. L2 is the neutral wire. It carries 120V back to the source.
Typically, these terminals will be marked COM and L1, or sometimes L1 and L2. Either way, it does not matter which wire is connected where. Usually the permanemt live (from the supply) is connected to COM and the switched live (to the lamp) is connected to L1.
One way switch has two terminals which are marked as L and L1. The terminal L is for the live wire that supplies the electricity flow into the switch and another terminal L1 is for the output electricity to the light.
A one way light switch has two terminals which is a common marked as COM or C. The common is for the live wire that supplies the input voltage to the switch. The other terminal is marked as L1 and is the output to the light fixture.
These terms are frequently used in language teaching as a way to distinguish between a person's first and second language. L1 is used to refer to the student's first language, while L2 is used in the same way to refer to their second language or the language they are currently learning.
The L1 is the switched live going out to the light. They will be marked so you can tell which is which. A two way switch (for switching a light from two different locations like in a hallway) has a common (C) a L1 and an L2 terminal. L1 is off when L2 is on and vice versa depending on the switch position.
L1, L2, and L3 coils are live wires with each on their own phase carrying their own phase voltage and phase current. Two phases joining together form one line carrying a common line voltage and line current. L1 and L2 phase voltages create the L1/L2 line voltage. L2 and L3 phase voltages create the L2/L3 line voltage.
The Brown wire represents Live and the Blue wire represents Neutral.
(L) = Live = Brown. (N) = Neutral = Blue. (E) = Earth = Yellow & Green.
The cores for three phase cables will be brown (phase 1), black (phase 2) and grey (phase 3) with blue (neutral).
'Common' is the terminal to which the live core wire is attached. This will usually be brown, or red on older circuits. L1 is the terminal connecting the circuit to the line out to the light and should be connected to the blue wire. If you have older circuits, the wire connected to L1 might be black.
The first letter indicates the basic color for the wire, and the second letter indicates the spiral line color. B = Black Br = Brown G = Green Gr = Gray L = Light Blue Lg = Light Green O = Orange R = Red W = White Y = Yellow Example: RG is for Red and a Green line.
L1 is live and L2 is neutral. These will not short out....
For older wiring it's the red (live feed) wire that goes in the top COM terminal and the black (switch wire) wire that goes into the L1 terminal. Again, the black (switch wire) wire would normally have a red tape or sleeve indicating that it is a live circuit and not neutral.
This is the most common residential service in North America. Line 1 to neutral and Line 2 to neutral are used to power 120 volt lighting and plug loads. Line 1 to Line 2 is used to power 240 volt single phase loads such as a water heater, electric range, or air conditioner.
L2 can be either Neutral - to form a 120V circuit - or L2 can be 120V - to form a 240V circuit. The C (common) terminal on a Run capacitor can always be used at a 'terminal point' for another circuit.
Current electrical wiring colours Australia
As of 2021, the colours used in current Australian electrical standards for single-phase wiring are: Active – Brown. Neutral – Blue. Earth – Green & Yellow.
L1 and L2 are the AC line power input (hence the sine wave symbol), while T1 and T2 connect to the load (the heating element).
Australia have their own electrical cable colour standards as set by AS 3000. Australian engineers use red, white and blue for their live wire colours. The specific difference that is unique to Australia is the white L2 line.