Electrical Engineering

electrical banner 3Electrical engineers, abbreviated as EE, design, develop, test, and supervise the manufacturing of electrical equipment.  Electrical & Electronic engineers design things such as power systems, electronics/microelectronics, signal processing, instrumentation & control systems, computers, and computer networks.


  • ELEC - electric
  • ELECDR - electric drive
  • EMD - electric motor driven
  • EPS - electric power supply
  • ELECT - electrical
  • ER - electrical resistance
  • ELEK - electronic
  • ELECTC - electronic control
  • EI - electronic interface
  • ES - electronic switch
  • EVM - electronic voltmeter
  • ELMCH - electromechanical
  • EE - Electrical Engineer


Electrical Engineering Subtopics

Electrical Engineering


Electric Wire Materials

  • Copper electrical wire - Copper (Cu) is considered the standard in wiring. Most homes and appliances use copper for two reasons. It is easy to mold or bend and it is a good conductor. Copper is rather easy to come by but not as easy as other conductor metals.
  • Aluminum electrical wire - Aluminum (Al) is also easy to mold and bend but less of a conductor than copper. If you decide to use aluminum wire that will carry the same amount of electricity as a copper wire, the wire needs to have a larger diameter. Since aluminum is more abundant than copper, it makes it the cheaper of the two.
  • Silver electrical wire - Silver (Ag) is the best conductor of electricity for high temperatures. However, it is hard to bend and expensive.
  • Alloys in electrical wire - In manufacturing, an alloy may sometimes be used. Aluminum and copper can be used for cost and conductibility.


Area Classification Drawing List


Electrical Engineering Associations


Professional Engineering Licence


Electrical Terms


  • Actuator  -  A device used to open, close, or control valves.
  • Alternating current (AC)  -  An electric current that reverses its direction over and over.
  • Alternator  -  A device which converts mechanical energy into electrical energy used to maintain a charge in a car battery.
  • American Wire Gauge  -  A measure of wire thickness.
  • Ammeter  -  An instrument for measuring the flow of electrical current in amperes.
  • Amp  -  Amp is a unit of current.
  • Amphere  -  A unit of measure for the flow of current in a circuit.
  • Analog  -  Analog or analogue is a continuous electronic variable signal caring information.
  • Analog switch  -  A switching device able to rought analog signals.


  • Battery  -  A storage device for energy and then discharge.  Batteries can be rated by their energy capacity.
  • Breaker  -  An automatic switching device that disconnect the power to a circut when the current or heat exceeds a certain level for a certain amount of time.
  • Broadband  -  A transmission medium with enough bandwith to cary multiple channels, data, video and voice at the same time.


  • Cell  -  Cells generate energy through a thermal process, chemical or optical.
  • Circuit  -  A closed loop through which electricity can flow.  The flow of current is from positive to negative. 
  • Conductor  -  A material through which heat passes.
  • Contacts  -  Components
  • Coulomb's law  -  The magnitude of the electrostatic force between two electric charges.
  • Current  -  The rate of flow of electricity in a circuit, measured in amperes.


  • Diode  -  A device allowing the current to flow as a one-way switch only and restricting the current from flowing in the opposite direction.  Diodes allow the current to flow when the anode is positive and the cathode is negative.
  • Direct current (DC)  -  An electric current that flows in only one direction.


  • Electrolyte  -  A compound that produces ions when dissolved in water and having either a positive of negative charge.


  • Frequency  -  The number of cycles per sec, measured in Hertz.
  • Fuse  -  An safety device that removes electrical current from a circuit when the current is two high.


  • Generator  -  A mechanical device that produces electrical energy from mechanical energy.


  • Hertz  -  A measure of frequency or cps (cycles per second).
  • Horsepower  -  A measure of power or the rate of doing work.






  • Magnetic field  -  Magnetic fields never cross, never start or stop, where the field is strongest lines bunch togeather and can be seen clearly seen in the real world.
  • Magnetic flux (\(\phi\) or \(\phi_B\))  -  The number of magnetic field lines passing through a given closed surface.
  • Magnetic switch  -  Depending on the switch configuration for on and off, the switch is activated when the magnetic field is detected.


  • Normally closed (NC)  -  The circuit is closed when the switch is not open.
  • Normally open (NO)  -  The circuit is open when the switch is not operated.


  • Ohm  -  A unit of resistance.
  • Ohm's law  -  The relationships between power, voltage, current, and resistance.


  • Primary cell  -  A dry cell and not a rechargeable cell.  A chemical reaction between electrodes and electrolites causing a permanent change.
  • Parrallel circuit  -  The parts are arranged in branches each going their own way.
  • Power  -  The rate of doing work and is measured by the amount of foot pounds of work done in a particular unit of time.



  • Rectifier  -  An electrical device that convert alternating current (AC) to direct current (DC).
  • Resistance  -  The ability to resist or prevent the flow of current.
  • Resistor  -  They resist the flow of electricity.


  • Secondary cell  -  A wet cell and is a rechargable cell.  Generates a current through a secondary cell in the opposite direction of the first cell.
  • Semiconductor  -  A type of material that has an electronic resistance between the metal and the resistance insulator.
  • Series circuit  -  The parts are connected end to end.
  • Shunt  -  Also called a shunt resistor, is a conductor joining two points in a circuit used to limit the speed of the current.
  • Solenoid  -  A device made of a coil of wire.  When current is introduced a magnetic field is formed around the coil (electrical energy) and the plunger is pulled in (mechanical work).  When the current is removed the plunger is released.
  • Switch  -  A device that opens and closes electrical circuit.


  • Thermal insulator  -  Does not conduct heat readily and is used for either heat conservation or personnel protection.
  • Transformer  -  A device that uses electromagnetism to convert one current to another current.
  • Transducer  -  A voltage output device used for convert energy to another form.
  • Transmitter (TX)  -  A current output device used for communication electronic signals over a distance.
  • Tuner  -  A circuit that can pick signals from a frequency from a group of signals of different frequencies.



  • Volt  -  A unit of electrical pressure.
  • Voltage  -  The amount of pressure that will cause one ampere of current in one ohm of resistance.
  • Voltage drop  -  The electricity between the meter and where it is be used.






Display #
API RP 500, Appendix B - Minimum Air Induction Ratio to Achive Adequate Ventilation Using Fugitive Emissions
API RP 500, Section 10
API RP 500, Section 11
API RP 500, Section 12
API RP 500, Section 14
API RP 500, Section 6
API RP 500, Section 8
API RP 500, Section 9
API RP 500, Ventilation
Area Classification Drawing
Control Narrative
Resistors in Parallel
Resistors in Series
Temperature Coefficient of Resistance
Voltage Divider
Voltage Drop

Tags: Equations for Electrical