The N & L stand for Neutral and Load. With your AC line in you should have three wires. Neutral, Load, and Ground. If your wires are color coded for the US then the black wire is Load or Hot, the white wire is Neutral, and the green wire is Ground.
What does L stand for in electricity?
In AC power supply, there are two symbols L and N. N is Neutral while L is Live or Line? N is Neutral: Does it mean this wire is connected to ground and so it always 0V compared to ground. L is Live or Line: what does it mean? Thanks!
Chapter 2 - Color Codes
|Protective ground||PG||bare, green, or green-yellow|
|Line, single phase||L||black or red (2nd hot)|
Any circuit's black wire should be considered hot or live. Black wire is never used for a ground or neutral wire and should be used as the power feed for a switch or an outlet. A black wire is often used in a circuit as a switch leg, the connection that runs from the switch to the electrical load.
In some part of the world certain people often refer to some type of (blunts, joints) as Ls. Some individuals claim L's is when a joint is rolled up with two papers and are connected to have an 'L' shape.
One is marked positive (+), the other negative (-). There are also positive and negative cables in the jumper cable set. The red one is positive (+), the black one is negative (-). Never connect the red cable to the negative battery terminal or a vehicle with a dead battery.
The white wire is the neutral, and all other colors are hot. Electricians often use black, red or blue wires to deliver electricity to a circuit from the main panel. They may use other colors for switch wiring, such as yellow or tan. Orange wires frequently are used to interlink smoke detectors.
The solid/dashed lines on wires like the ones pictured in your question are used to indicate polarity e.g. for the "wall wart" power supplies. Usually* the wire with the white stripe or the dashed lines carries the "positive" (+) end, while the other, unmarked wire carries the "negative" (-) end.
Feed a length of 14-3 type NM cable (or 12-3, if you're connecting to 12-gauge wire) between the two boxes. The 14-3 cable has three insulated conductors: white, black and red (plus a bare ground wire). Connect the wires to the new three-way switches with ground screws using one of the two wiring diagrams (Fig.
If a fault occurs where the live wire connects to the case, the earth wire allows a large current to flow through the live and earth wires. This overheats the fuse which melts and breaks the circuit. If a faulty live wire touches the inside of the plastic case there's little risk as the case is an insulator.
Step-by-step guide to wiring a plug
- Unscrew the plug cover. Loosen one flex clamp/cord grip screw, remove the other.
- Remove the fuse. Carefully lever it out with a screwdriver if necessary. Loosen terminal screws. Warning.
- Finally check: Wires are connected to the correct terminals. There are no stray 'whiskers' of wire.
Note: The Yellow/Green wire (Earth) needs to be slightly longer than the blue (Neutral) and Brown (Live) wires, in order to reach the top terminal. It is better to have the cables slightly longer than necessary and cut them to the correct length than try to stretch cables to make them reach the terminals.
"E" stands for "Electromotive force", which is essentially just voltage. We just have come used to using "V" instead of "E" It would be the same as asking why Current is "I" even though it is measured as Amps. Likewise it would also be the same as asking why Resistance is "R" even though it is measured in ohms.
Neutral is a circuit conductor that normally carries current back to the source. In the electrical trade, the conductor of a 2-wire circuit connected to the supply neutral point and earth ground is referred to as the "neutral".
The plug. In a plug, the blue neutral wire goes to the left, the brown live wire to the right and the green and yellow striped earth wire is on top. The fuse fits next to the live wire. The diagram shows the key features of a three-pin mains plug.
It is customary to use the symbol L for inductance, in honour of the physicist Heinrich Lenz. In the SI system, the measurement unit for inductance is the henry, with the unit symbol H, named in honor of Joseph Henry, who discovered inductance independently of, but not before, Faraday.
One side of the receptacle has (2) brass screws and the other side has (2) silver screws. The hot side of the circuit (black wire) should be wired to the brass screws while the neutral side of the circuit (white wire) should be wired to the silver screws. You only need to connect to (1) screw on either side.
The question often comes up about using black/red/white for 120/240 V single phase and brown/orange/yellow/gray (BOY) for 277/480V three phase and similar. There used to be a color code requirement in the NEC, but it was removed in the mid-70's.
The earth wire creates a safe route for the current to flow through if the live wire touches the casing. You would get an electric shock if the live wire inside an appliance, such as a cooker, came loose and touched the metal casing. This breaks the fuse and disconnects the appliance.
The common is the main live coming in. 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.
Reversed Polarity Outlets. Reversed polarity creates a potential shock hazard, but it's usually an easy repair. A brief definition of Hot and Neutral wires: On a standard outlet, which is technically called a 'duplex receptacle', there are two wires that carry electricity.
The “R” for resistance and the “V” for voltage are both self-explanatory, whereas “I” for current seems a bit weird. The “I” is thought to have been meant to represent “Intensity” (of electron flow), and the other symbol for voltage, “E,” stands for “Electromotive force.”