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Why do some hair driers not require a three wire grounding cable?
Wiki User
∙ 10y ago
A typical hair dryer is 'double insulated'. This means that it usually has two layers of insulation where ever there are any live parts.
It has a plastic (non conductive) body, and is designed such that no single failure can result in dangerous voltage becoming exposed so that it might cause an electric shock.
Wiki User
∙ 10y ago
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What three ways charge may be transferred?
the three ways that charge may be transferred are through friction,charge polarization, and grounding.
What does the third grounding wire of a three-pronged plug do?
It provides a safe path for errant electricity. Never cut it off.
What changes of state require energy?
Sublimation, melting, and vaporization are three changes of state which require energy.
Does fire requires nutrition?
A fire needs three things: fuel, oxygen, and heat. If fuel can be considered "nutrition" then yes it does require nutrition.
How should thermometer be maintained?
Many digital and infrared thermometers are self-calibrating.mercury thermometers should be shaken down prior to every use and left in place for at least three minutes. They require careful storage.and thorough cleaning after each use.
List three subsystems of an aircraft navigational system?
Power, Signal Processing, & Grounding
Why does a plug have three wires?
The third prong on the bottom of the plug is for "grounding," in case of a short.
what is the difference between 2 core and 3 core round cable?
2 Core Round Cable: A 2 core round cable typically consists of two conductors, often insulated wires, enclosed within a protective outer sheath. These cables are commonly used for applications that require a simple connection or circuit where only two conductors are needed. They are often used for low voltage applications, such as household electrical wiring, lighting circuits, and audio connections. An example scenario might be connecting a lamp, where one conductor is used for the live wire and the other for the neutral wire. 3 Core Round Cable: A 3 core round cable, on the other hand, contains three conductors within the same protective sheath. These cables are useful when an additional conductor is required, often for applications involving grounding or situations where a three-phase power supply is needed. They are frequently used in industrial settings for heavy machinery, three-phase motors, and appliances that require more complex electrical connections. The three conductors in these cables typically consist of live, neutral, and ground wires, providing a more comprehensive electrical solution compared to a 2 core cable.
What three ways charge may be transferred?
the three ways that charge may be transferred are through friction,charge polarization, and grounding.
The load interrupters of the primary switching center provide internal grounding for?
all three of the phases
Dial up cable and DSL are three types of?
Dial up,cable and dsl are three types of?
Why neutral of generator is resistance grounded and neutral of motor is reactance grounded?
You can use resistance or reactance grounding on generators and motors. My understanding is resistance grounding is often used to limit ground fault currents to a few amperes, while reactance grounding will limit fault current to less than the three phase fault current. If reactance grounding is used to limit fault current o very little (like resistance grounding), transient overvoltage problems can occur.
What appliances have three pins and which have two pins?
Appliances and tool that only have two pin caps (plugs) are built so that they have double insulation. This means that the electrical "hot" parts can not be touched by handling the appliance or tools and the outside shell is completely insulated and isolated from the inside shell of the equipment. Equipment that require a three pin cap (plug) do not have the double insulation and isolation built into the equipment so protection from getting an electrical shock is done by grounding the equipment, that is what the third pin is. It is used strictly for grounding.
Do you class a twin and earth cable as a two core or a three core cable?
2
Modern networks primarily uses three types of media to interconnect devices?
The three types of network media are: Twisted-pair copper cable, fiber-optic cable, and coaxial cable.
What does the third grounding wire of a three-pronged plug do?
It provides a safe path for errant electricity. Never cut it off.
There are three female connector cable and one male connector cable attached to the?
distribution box
