What happens if you don't connect the earth wire?

Without the earth wire, if a fault occurs and the live wire becomes loose, there is a danger that it will touch the case. The next person who uses the appliance could get electrocuted .

bbc.co.uk - Mains electricity - GCSE Physics (Single Science) Revision - Eduqas

What's hot at flea markets?

These 10 hot items to sell at flea markets are trending right now and will be super popular at most flea markets. ... 10 Hot Selling Wholesale Flea...

Last updated Jan 19, 2022

Will building materials go down in 2022 UK?

When will the materials shortage end? Not yet. According to the CLC, pressures on global shipping, including delays and volatile prices, look set...

Last updated Aug 25, 2019

These are the Best Shed Plans!

Comprehensive and Intuitive to follow. Build That Shed!

Learn More »

Promotion

Mains electricity

Plugs A plug connects a device to the mains electricity supply. The cable between the device and the three-pin plug contains three copper wires that are coated with plastic. Copper wires are good conductors . Plastic is a good insulator . The insulation of the wires is colour-coded to ensure correct connection. Wire Colour Live Brown Neutral Blue Earth Green with yellow stripe Each part of the plug has a function. Features of a plug Function Outer cable insulation All three wires in the cable are bundled together and there is extra plastic insulation wrapped round them all for safety. Cable grip This holds the cable tightly in place so that the cable cannot be pulled out of the plug. Live wire Copper wire coated with brown plastic along which the current enters the device. This is the wire that is at 230 V and is connected to the fuse. Fuse A glass or ceramic canister containing a thin wire that melts if the current gets too high. Neutral wire Copper wire coated with blue plastic that also connects to the cable in the wall and completes the circuit. Earth wire Copper wire coated in striped plastic that provides a path for current to flow from the case of the device to the ground if there is a fault. Earthing Without the earth wire, if a fault occurs and the live wire becomes loose, there is a danger that it will touch the case. The next person who uses the appliance could get electrocuted . The earth wire is therefore connected to the case and is attached to a metal plate or water pipe underground. As the wire is made of copper, the earth wire provides a low resistance path to the ground. In the event of a fault, the large live current passing through the case earth wire will follow this path to the ground instead of passing through a person, and will blow the fuse rendering the appliance safe. Some appliances, such as vacuum cleaners and electric drills, do not have an earth wire. This is because they have plastic casings, or they have been designed so that the live wire cannot touch the casing. As a result, the casing cannot give an electric shock, even if the wires inside become loose. These appliances have double insulation and carry this symbol:

How much does it cost to put toilet and shower in a shed?

And if you're looking to trick out your shed with a wet bar or convenient bathroom? Plumbing is an even more costly addition, starting at $1,000 to...

Last updated Nov 29, 2018

Do moth balls keep rats away?

Mothballs are meant to kill moths, eggs and larvae, but are also used to keep rats, mice and squirrels away.

Last updated Sep 1, 2019

Promotion

Should you earth armoured cable at both ends?

It should be earthed at least at the source end, as it is clearly an exposed conductive part. Most calculation methodologies and much tabulated cable data assumes that the armour is reliably connected to earth at both ends.

engx.theiet.org - Bonding both sides of an swa cable - Wiring and the Regulations BS 7671

OK, but if the armour is not earthed at all, at the risk of stating the obvious, the cable does not meet the regs requirement for a cable with an earthed armour, and is then to be treated as you would perhaps twin and earth, in terms of safe zones where you can route it and if it needs an RCD at the origin in case it is damaged.Given where and how SWA is normally used, there are few cases where electrically floating the armour makes any sense - if you do not need an earthed armour, then use a cheaper cable. If you do need it, then earth itI have seen the armour terminated not in glands but combed as a 'tail' into large terminal blocks, in much the same way that concentric cables are terminated at DNO fuses etc. It does not provide the mechanical anchor like a normal gland, but n those odd cases where that is not needed, electrically such a termination can be very satisfactory. (though I like to see heatshrink and there almost never is.) Certainly a tail is better than no connection.