Electrical Engineering Terms B

Bonding. The act of interconnecting two or more conductive bodies to establish electrical continuity and conductivity. Baseline Speed. Listed on the nameplate of a given electric motor, the baseline speed is the full-load or running speed or rpm of the motor when it is operated at its rated voltage, rated …

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Electrical Engineering Terms C

Capacitance / Stray Capacitance. Capacitance is the storage of electricity in a capacitor. Capacitance in the earth is referred to as stray capacitance. Stray capacitance describes the storage of an electrical charge on the ground due to a natural difference of pressure (static electricity). Capacitor / Condenser. The descriptive term …

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Electrical Engineering Terms D

Demarcation Point. The term demarcation means the setting or marking of boundaries or limits. Demarcation point is the service point where the electrical-utility power transmission/distribution grid with installation governed by the NESC (National Electrical Safety Code) stops, and the electrical power distribution system for a building or other structure (premise …

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Electrical Engineering Terms E

Eddy Currents. Circulating currents induced in conductive materials by any type of varying electromagnetic fields. Effective Ground-Fault Current Path. An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply …

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Electrical Engineering Terms F

Footing. As used in a building or other structure construction: A structural unit used to distribute loads of the bearing materials. Free Electrons / Valence Electrons. The electrons located in the outer orbit of an atom. Normally associated with metals or other conductive material, free electrons are loosely held within …

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Electrical Engineering Terms G

Greenfield. The trade name for flexible metallic conduit. Ground Fault / Ground-Fault Overcurrent. (1) An abnormal connection in an electrical circuit, where the normal load path is either partially or completely bypassed through this non-circuit return path, which is the equipment-grounding system of an electrical power distribution system. The low …

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Electrical Engineering Terms H

High Voltage (High Tension). A general term used to describe circuits with system voltages greater than 600 volts and to imply that the voltage is of such a value that it is dangerous to humans. Extreme caution should always be used when troubleshooting equipment marked with this term. Horsepower (HP) …

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Electrical Engineering Terms I

I/O Module Field replaceable modules that accept or send signals from field devices and condition the signal for the CPU. IGBT Insulated Gate Bipolar Junction Transistor – A semiconductor device that provides the base technology for the modern drive. Imperial Units These are the measurement units used in the United …

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Electrical Engineering Terms K

Kirchhoff’s Current Law.   The sum of the currents entering and leaving a node is equal to zero; the sum of the currents entering a node is equal to the sum of the currents leaving that node. Kirchhoff’s Voltage Law.   The sum of the voltage drops in a closed loop …

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