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Summary: Building dictionay to explain building jargon and terminology from A - Z.
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Building dictionary for the letter E - Page 5
Electrical conductivity
The ability to transmit an electrical current.
Electrical insulator
An electronics component which, because of the electrical resistance inherent in the material(s) from which it is fabricated, is itself considered to be a nonconductor of electric current. The component is sometimes designed so as to physically support a conductor while separating it electrically from another conductor or object.
Electrical metallic conduit
Heavy-walled conduit that encloses and protects wiring.
Electrical resistance
The opposition to the flow of an electric current as manifested by a device, conductor, substance, or circuit element. Electrical resistance is measured in ohms.
Electrical tape
A tough, fibrous or thermoplastic adhesive tape used primarily to insulate electrical joints or conductors.
Electrode
(1) A solid electric conductor through which an electric current enters or leaves an electrolyte, vacuum, gas, or other medium. (2) That component in an arc welding circuit through which electric current is conducted between the electrode holder and the arc itself. (3) In resistance welding, that component through which the electric current in the welding machine passes directly to the work and which is usually accompanied by pressure, such as from a clamp.
Electrogalvanizing
A method of coating iron or steel with zinc deposited by electroplating rather than by immersion.
Electrolysis
The process of producing chemical changes or the breakdown of chemical compounds into their constituent parts by passing a current between electrodes and through an electrolyte.
Electrolyte
(1) A substance that separates into ions when in a solution or when fused, thereby becoming electrically conducting. (2) A conducting medium in which the flow of electric current occurs by the migration of ions.
Electrolytic corrosion
The deterioration of metal or concrete by the chemical or electrochemical reaction resulting from electrolysis.
Electromagnet
An iron-based object that becomes magnetic when a current is passed through the coils around it. The object loses its magnetism when the current is stopped.
Electromagnetic interference (EMI)
Radiation emission from a transmission medium caused by using high-frequency signal modulation. Can be reduced by shielding.
Electronic controls
In an HVAC system, the electronically operated sensors and controls.
Electronic distance meter (EDM)
A surveying device used to measure distance. Distance is determined from the time it takes transmitted electromagnetic waves to reach a target.
Electroplating
The deposition of a thin, sometimes decorative but usually protective metal coating onto another metal. Electroplating occurs by submerging the receiving metal into an electrolyte, where electrons from the anode (the coating metal) flow to and are deposited on the receiving metal (or cathode).
Electrostatic air cleaner (electrostatic precipitator)
A type of filtering device that prevents smoke and dust from escaping into the atmosphere by charging the particles electrically as they pass through a screen. The particles are attracted to one of two electrically charged plates and subsequently removed.
Electrostatic precipitator
See electrostatic air cleaner.
Element
The smallest division of a breakdown.
Elevated slab
A floor or roof slab supported by structural members.
Elevated floor
Any floor system not supported by the subgrade.
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