Appliances encased in an insulating plastic case or body, such as hair dryers, mobile phone chargers and hand whisks do not need an Earth wire.
Light fittings made from non-conductive materials do not need to be earthed. This is because the fire and electrocution risks are significantly reduced when lights are made from plastic, glass and other non-conductive materials.
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.
Class II devices do not require an earthing conductor and should not be earthed. These appliances are designed with two layers of insulation to protect users from electrical shock in case there is a fault. Most electrical devices that are subject to movement and the flexing of cords fall under this category.
Non-earthed appliance are called Class 2 appliances and also have two levels of protection against electric shock. The first level is the insulation around the conductors. The second is typically a chassis made of a non-conductive material that has very high insulating qualities.
Appliances encased in an insulating plastic case or body, such as hair dryers, mobile phone chargers and hand whisks do not need an Earth wire.
A Class II or double insulated electrical appliance uses reinforced protective insulation in addition to basic insulation. Hence, it has been designed in such a way that it does not require a safety connection to electrical earth (ground).
Fridges are required to be grounded due to the hazardous nature they present.
Without the earth wire, if a fault occurs and the live wire becomes loose, there is a danger that it will touch the metal case. The next person who uses the appliance could get electrocuted.
To completely eliminate possible risks, it is necessary to ground washing machines, electric and induction cookers, microwave ovens, personal computers, boilers. The safety of boilers should be given the utmost attention. Water is the best conductor of electricity.
If you have faulty earthing, contact a licensed electrician to look at your electrical system to find the problem.
Some appliances will only have two wires - live & neutral. These are 'Double Insulated' and do not rely upon the earth wire for protection. The plug is wired as above but there is no earth wire to connect, however make sure that the screw on the earth terminal is not loose.
yes, there is no earth wire in 2 pin plug. Because 2 pin plugs are used in low power appliances Hence they do not require earthing.
The electrical regulations require the LED fixtures to be grounded in order to ensure safety. Hence, by having LED light fixtures grounded these regulations are adhered and also safety across the different applications is achieved.
Why do some appliances not have earthing wires? If an appliance has a metal chassis, then it will act as a conductor. This means that any electric current flowing through the appliance will flow into the earth. However, if there is no metal chassis, the appliance acts as a resistor.
You can either wrap the ground wire in the electrical box with tape and let it float in the electrical box, or you can attach the ground wire in the electrical box to the light fixture, or appliance, itself.
1. Install GFCI Outlets. GFCI outlets provide the same shock and fire prevention that a ground wire provides, but the installation process is much simpler. They work by monitoring the current going in and out and tripping a breaker when the difference exceeds a preset limit.
The 1962 USA National Electric Code stipulated that all new 120V wiring installations in the US must have wall socket outlets that are both polarised and grounded.
There will be no problem on how the appliance will operate even if the appliance is not grounded, but for additional safety you can also connect the grounding wire for appliances that are prone to short-circuit in the areas close to water, as washing-machines or refrigerators, it is safer to plug the grounding wire.
Upright and chest freezers must be properly grounded. The power cord is equipped with a three-prong (grounding) plug which plugs into a standard three-prong wall outlet. This minimizes the possibility of electric shock hazard from this appliance.
If your outlet is not grounded, or though grounded if the ground rod is not connected properly, you might feel miniscule amount of current when your skin contacts the refrigerator door. But it is harmless to human body. It is similar to the feeling you have when you suddenly hold the car door handle or wear sweater.
Earth Bond Test Currents
The earth bond test passes a test current along the earth cable from the pin of the plug to the bodywork of the appliance. The appliance tester then measures the resistance of that connection. If the connection is rusty, non-existent or corroded then the earth resistance reading will increase.
Typically this would be something with a metal casing (but not always), such as a PC tower or a kettle. The other is known as a 'double insulated' appliance (Class 2), and doesn't require an earth. An example of this would be a phone charger (you'll note they usually have a plastic dummy earth pin on the plug).
Question: Can refrigerator be used normally without earth wire? Answer: Reason: The refrigerator could also operate without the earth wire. But it is really dangerous when any part of your body touch the cabinet if the refrigerator has electric leakage.
The earthing of metallic appliances is necessary to prevent severe electric shock to the users. The metallic body of electric appliances is connected to earth wire so that any leakage of electric current is transferred to the ground.