Electrical grounding, otherwise known as earthing, primarily provides a measure of safety against electric shocks by acting as a safety line to redirect electric current in the event of short circuits. For household appliances, this is accomplished by a three-pronged electrical outlet with a dedicated grounding prong.
- measurement of the amount of flow in an electrical current; shorten to “amp”; named in honor of Andre’-Marie Ampere (1775-1836) for his early work in the field of electrodynamics.
Wire Gauges and Uses
|Wire Use||Rated Ampacity||Wire Gauge|
|Low-voltage Lighting and Lamp Cords||10 Amps||18 Gauge|
|Extension Cords||13 Amps||16 Gauge|
|Light Fixtures, Lamps, Lighting Runs||15 Amps||14 Gauge|
|Receptacles, 110-volt Air Conditioners, Sump Pumps, Kitchen Appliances||20 Amps||12 Gauge|
|Electric Clothes Dryers, 220-volt Window Air Conditioners, Built-in Ovens, Electric Water Heaters||30 Amps||10 Gauge|
|Cook Tops||45 Amps||8 Gauge|
|Electric Furnaces, Large Electric Heaters||60 Amps||6 Gauge|
|Electric Furnaces, Large Electric Water Heaters, Sub Panels||80 Amps||4 Gauge|
|Service Panels, Sub Panels||100 Amps||2 Gauge|
|Service Entrance||150 Amps||1/0 Gauge|
|Service Entrance||200 Amps||2/0 Gauge|
- in electrical generation; a measure of the force of electrical current; named after the scientist who perfected the dry cell battery in 1800, Alessandro Volta.
- The standard voltage for electrical wiring systems is 240 volts. However, it is not simply a single wire feeding all that voltage in a single stream at 240 volts. Wiring systems are split so that there are two wires, each delivering 120 volts. These are used in a cyclic variation, giving what is known as an alternating current, or in tandem, to supply 240 volts to high-energy appliances such as tumble dryers.Read more: http://www.ehow.com/info_12145473_standard-house-wiring-voltage.html#ixzz2kOLNQyMg