• #### Thread Voltage (Volts)Voltage (Volts)

Voltage is the amount of electrical pressure from a source that is used to generate the current.  A volt is defined as the potential difference across a conductor when a current of one ampere dissipates one watt ...
• #### Thread Smart Grid  (modernization of the national electric grid)Smart Grid  (modernization of the national electric grid)

The electric grid delivers electricity from points of generation to consumers, and the electricity delivery network functions via two primary systems: the transmission system and the distribution system. The transmiss...
• #### Thread What is LEED?What is LEED?

What is LEED?
• #### Thread Single phase electricitySingle phase electricity

Generated AC power is commonly in three phase in which the waveforms of  three supply conductors are offset from one another by 120 degrees.  The power generator has three sets of coils placed 120 degrees ap...
• #### Thread Three-phase electricityThree-phase electricity

Three-phase electricity is a method of alternating-current electric power transmission using three wires.   Most power is distributed in the form of three-phase A.C. It is the most common method used by electric...
• #### Thread Kilowatt Hour (kWh)Kilowatt Hour (kWh)

The kilowatt-hour (symbolized kWh) is a unit of energy eqivalent to one kilowatt (1kW) of power expended for one hour of time.  It is the standard measure of electrical energy and the typical billing unit used by...
• #### Thread Kilowatt (kW)Kilowatt (kW)

A kilowatt is the measure of electrical power equal to 1000 watts.

A Watt is a measure of the amount of electricity being used - a rate of electrical power consumption. A very simple mathematical formula can be used to determine how many watts an electrical circuit can carry or how m...
• #### Thread Amperage (Amps)Amperage (Amps)

Amperage or current is a measure of the amount of electrons moving in a circuit.   In other words, amperage is how fast electricity is moving.  The "water pressure in pipes" analogy is commonly used to help...
• #### Thread Alternating Current (AC)Alternating Current (AC)

When a conductor spins within a magnetic field, an alternating voltage is induced across the wire and an alternating current flows through the wire.  That is, current flows first in one direction through the wire...
• #### Thread Residential CircuitsResidential Circuits

Power that is provided for residential circuits is generated at very high voltage and is stepped down to 7200VAC by transformers located at substations throughout the distribution route.  A distribution transform...

When direct current flows through a wire a magnetic field is induced.   If alternating current flows through a coil, the induced magnetic field expands and contracts proportional to the sine wave.   W...
• #### Thread Direct Current (DC)Direct Current (DC)

Direct current is an electric current that flows in only one direction.   Direct current is produced by such sources as batteries, thermocouples and solar cells.  The positive and negative terminals are...
• #### Thread Root-mean-square (RMS) valueRoot-mean-square (RMS) value

In terms of typical residential 120VAC, it should be understood that this value is an RMS value.  The actual peak voltage is 170VAC.  The 120VAC effective value is calculated by 170VAC Peak x 0.707 = 120VAC ...
• #### Thread Frequency and HertzFrequency and Hertz

The numbers of cycles of alternating current that occur in one second is called frequency, which is measured in Hertz (Hz).  60Hz is the frequency generated by all power generating stations throughout the United ...
• #### Thread Sine WaveSine Wave

As the conductor spins, it "cuts" the magnetic field at different angles.  The angle at which the magnetic field is cut determines the amount of current and voltage that is produced.   If we measure and plo...
• #### Thread Induced CurrentInduced Current

If a wire is passed through a magnetic field a voltage is induced across the wire and current flows through the wire.
• #### Thread Magnetic FieldMagnetic Field

When current flows through a wire conductor, a magnetic field is created around a conductor. In 1819 Hans Christian Oersted, a Danish physicist, found that a definite relation exists between magnetism and electricit...
• #### Thread What does the NEC stand for in reference to electricity?What does the NEC stand for in reference to electricity?

What does the NEC stand for in reference to electricity?