In the US older 2-conductor house wire has a white-insulated and a black-insulated wire. The white wire is the neutral and the black is the hot wire. Newer house wire has a third bare copper wire to serve as the ground wire. Insulated ground wire has a green jacketing on it. Red wires are for switch legs. You want to be sure that whomever did the wiring didn't flip the colors around. You can do this by checking the fuse or breaker box - the white or neutral wires should all run to the multi-neutral ground bus bar and the black or hot wires should each go to their respective circuit breakers or fuse sockets. On your switches and recepticals, the gold screw is for the black, or hot wire, and the silver screw is for the neutral. The green screw would be for the ground wire. Mostly, use a qualified electrician to do any work unless you are quite handy, have all necessary tools and fully aware of all safety precautions and code requirements that may exist where you live.
In the UK, the old wiring colours were... Live = red, Neutral = black, Earth = green.
Canada and US - The colour of live wires in home wiring are red and black. The neutral is white. Ground is bare when in a cable set like loomex. Ground is green when associated with fixtures and appliances.
In Bangladesh the color of live is green and neutral is blue and ground is black.
In your house!
At least two cables: red/brown (live) and black/blue (neutral)
Answer for USA, Canada and countries running a 60 Hz supply service.In the US the black wire in a plug is the "hot" conductor. The neutral is white. In most of Europe and Australasia on old or fixed house wiring the black is neutral.
When you encounter a red wire in house wiring, it may be live or may be neutral. Commonly used in wiring 2-way switched lighting, that red wire in a 4-wire bundle is switched by the 2 switches in some wiring arrangements so that it can be hot with the switches set one way, and neutral with the switches set another way. In 220v circuits, both the black and the red wire are HOT.
The neutral wire is to complete the a.c. circuit. It brings the current back to the supply.
The old German house wiring colours were red for live and black for neutral, there was no earth or ground wire. This was due to the scarcity of copper during, in between and after the world wars, all equipment running 230v was earthed via the neutral wire. Equipment running on a higher voltage was earthed correctly.
If you live in Europe, then the brown wire is the line ('hot') conductor; a blue wire is the neutral conductor, and a yellow/green striped wire is the protective (earth) conductor.
live wire,earth wire and neutral wire
Red, Yellow and Blue for Live. Black for neutral and Green for Earthing
The terminology varies from country to country. You will find some more information here:https://www.allaboutcircuits.com/textbook/reference/chpt-2/wiring-color-codes/
The last time I was in France, everything was 220 Vol0s, therefore, no neutral.
All depends on what country you are in, wiring standards and cable type. Industrial cable in the UK is. :- Red = Live Black = Neutral Copper wire = earth. (add Green/Yellow striped sleeve at junctions.) Domestic is:- Brown = Live Blue = neutral Green/yellow stripe = Earth Europe Black = Live Blue = Neutral Brown = Earth
ready for the answer
The brown wire is live (Mr Brown is a live wire!)Blue is the neutral wire for the return current. Green/yellow is the earth wire.
A switch on the live wire means, when off, current can't flow past the switch and reach a bulb, for instance. If the switch was on the neutral side, when off, the current would be able to reach the bulb and the bulb holder would be live - chance of a shock!
Australia: ANZS3000 Active= Red or Brown Neutral = Black or Light Blue Earth = Green or Green and Yellow stripe
US standard Earth is green, live is black, and neutral is white UK Live is brown, neutral is blue, and earth is green with yellow stripe. Since in the US the earth is referred to as the ground wire it is assumed you are asking about UK standard.
U.S. Presidents live in the White House, in Washington DC. And its exterior really is white.
Live wire and the neutral wire
In most cases it doesn't matter, but some appliances like a light dimmer will not work correctly otherwise. If it is a electronic device it will have a capacitor between signal ground and neutral. Faulty wiring will make it possible to get small (non lethal) shocks by touching earth and signal ground or introduce hum in audio devices. So, important no, but wise.
Assunimg you're talking about the UK domestic wiring system... Brown = Live Blue = Neutral Green/Yellow = Earth