A cable's voltage rating refers to the highest voltage to which it may be attached (and have running through it). If the voltage rating is exceeded, the insulation between the cable cores or between a cable core and the ground may fail, resulting in a short circuit or a fire. 0.6/1 kV is a standard voltage rating. Higher ratings can be found for special applications.
The voltage rating of a cable is the maximum voltage that may be continuously applied to a finished cable construction in accordance with the appropriate cable standard or specification (see to this link for a definition of a volt). It is the maximum voltage that a cable can operate at while being stable. Cables are not designed to handle continuous high loads over their length, so they must be capable of withstanding such loading for as short a time as necessary before replacement is required.
Cables do contain voltage when exposed to an external power source, but this voltage is very small. When a cable is connected to a circuit board or other component, it will usually receive its full operating potential through its pins or terminals. However, only certain ones of these connections are meant to carry current; the others are simply made to provide mechanical support and signal transmission. These intended current-carrying connections are called "hot" wires. The other wires on the cable are called "neutral" or "third" wires because they are supposed to carry no current but instead act as a conduit for electrical noise immunity. A term used for any wire that does not carry current is "ground" wire.
When electricity flows through a conductor (such as a copper wire), electrons are pushed along by the electric field surrounding the conductor. This creates a flow of electrons through the conductor. A conductor cannot break free from this flow of electrons unless another path is provided for it to follow.
The voltage is 600 volts. The most typical household voltage rating is 600 volts, however this might vary. The number represents the highest voltage that the cable may safely carry. Any electrical device connected to this wiring should also have a protection mechanism which will shut off the power if it exceeds its tolerance for voltage or current.
Cable specifications are usually listed with other information about the cable on the box that it came in, along with any labeling that the manufacturer put on the cable itself. The information typically includes: voltage capacity; frequency range; material composition; environmental resistance; and physical dimensions such as diameter and length.
For example, an extension cord designed to fit into a standard outlet can be used to reach outlets in some rooms that would otherwise be inaccessible. These extensions can be very useful when you need to move equipment from one part of the house to another. They are made specifically for each brand of plug, so make sure you get one with the right type of connector for your system.
Extension cords are different from power strips in that they are only used to provide additional lengths of cable. If you need to connect several devices that use different sizes of cable, then a power strip is the way to go.
Voltage danger is caused by a spark jumping to another conductor, which insulation avoids. The majority of domestic wire in the United States is rated at 600V, and it should be labeled on the side. —-Hank 29 October 2014, 14:41 Remember the distinction between peak and steady-state current (or power) draw. A device that draws 1A all the time will use up its 2W capacity in one hour, no matter how long the battery lasts. But if it only uses 100mA for five minutes then it will last longer.
The voltage across any section of a circuit must always be the same. So if you have two wires with different voltages coming into a junction or terminal, they'll be separated there. The voltage difference will be carried by just one of the wires; the other one will be grounded (0V).
In a home wiring system, each branch off the main wiring runs at a single voltage. Usually this is either the hot wire (black or red), which may be 12 volts or 240 volts from the transformer station. The other wire is the neutral (white), which should be connected to the ground rod or metal box on the exterior of your house. This way, if something goes wrong with one leg of the circuit, the other ones remain unaffected. Any device plugged into the outlet will receive the full force of whatever voltage is present on both wires.
Household wiring has not changed much over time.
170 kV voltage High-voltage cables with a maximum voltage of 170 kV are made. These cables are used to transmit electricity from power stations to substations and from there to distribution points, where they are distributed to local customers.
The maximum voltage that can be transmitted by a cable is limited by the insulation material's ability to withstand electrical stress without breaking down. At voltages below about 30 kV, aluminum wire is used because it is much more conductive than copper at lower currents. But at higher voltages, copper is preferred because it does not cause electric interference in neighboring circuits and can carry much greater current loads. Cable manufacturers try to use as much aluminum as possible for low resistance to reduce the need for large currents which would cause heat damage to the cable.
Cables used to transmit electricity between buildings or between parts of a single building must be able to handle high voltages. In addition, cables used in radio transmission systems should have minimal effect on radio frequency (RF) signals. This means that they must contain no metal parts which could act as antennas for receiving RF signals or which might come into contact with antennas at the other end of the cable.
As previously stated, the voltage of the appliance or circuit has no influence on the wire size (gauge). Voltage determines the quality of a wire's insulation, and most (power) wires we meet are rated for 600 volts. But there are specialty wires with different qualities used in high-voltage applications.
The only way the voltage of an electrical system affects the size of its wiring is by determining how much current it must carry. If you double the voltage, you need to quadruple the current capacity of any wire that will be used in the network.
For example, if you run a wire from a light fixture to a lamp and the old wiring was 14 AWG, then the new one must be at least 28 AWG to handle the same amount of current. The same thing goes for any other conductor in the circuit: If one gets too small, more than half the current will flow through it, destroying the insulation prematurely. The solution is easy: Just use bigger wires!
The voltage of an electrical system affects the size of its wiring in two ways: First, if you double the voltage, you need to quadruple the current capacity of any wire that will be used in the network.
The International Electrotechnical Commission defines "high voltage" in the context of building wiring and the common usage of electrical devices as more than 1,000 volts (V) of alternating current (AC) and more than 1,500 volts (DC). The term does not apply to power lines since these operate at lower voltages for efficient transmission.
High voltage means greater energy per unit length along a conductor. Because of this higher energy content, high voltage circuits must be handled with care. Static electricity is particularly problematic in high voltage situations because it can cause serious damage to circuitry. Human contact also raises concerns; the skin should never come in contact with any part of the circuit except at ground points or metal parts of equipment.
Circuits containing voltages above about 1,000 V cannot be isolated completely. Some leakage will always occur between both sides of the circuit, so these circuits require special handling techniques to prevent people from being exposed to the risk of electric shock.
Power lines are usually limited to about 10,000 volts AC or DC. This is far below most household circuits which can range up to 138,000 volts AC or DC. Power lines need to be separated by enough distance that their fields do not overlap, preventing any current from flowing through your house wiring.
Power companies try to ensure that there are no problems with high voltage wiring on any block of houses they service.