Electrician and Electrical Contractor Terminology
Find an electrical engineering term alphabetically:
|Baker Board – A insulated platform used to work above the ground on a pole.
|Balanced Load – Refers to an equal loading on each of the three phases of a three phase system…
|Balanced polyphase system – A polyphase system in which both the currents and voltages are symmetrical.
|Ballast – A device that by means of inductance, capacitance, or resistance, singly or in combination, limits the lamp current of a fluorescent or high intensity discharge lamp. It provides the necessary circuit conditions (voltage, current and wave form) for start
|Bandwidth – The data carrying capacity of a transmission path, measured in bits or bytes per second.
|Bank – A group of electrical devices, usually transformers or capacitors, connected in a way to increase capacity or to inter connect as three-phase.
|Basic impulse level (BIL) – A reference impulse (voltage) insulation strength expressed in terms of the peak value of the withstand voltage of a standard impulse voltage wave. It is used to express the ability of electrical equipment such as transformers to withstand certain levels
|Basic Insulation Level – A design voltage level for electrical apparatus that refers to a short duration (1.2 x 50 microsecond) crest voltage and is used to measure the ability of an insulation system to withstand high surge voltage.
|Battery – A combination of two or more chemical cells connected together electronically to produce electrical energy.
|Battery Tray – A contained with a base and walls for holding several cells or batteries.
|Bay-O-Net – A fusing device frequently used to protect transformers and downstream devices. A Bay-O-Net fuse may include a Partial Range Current Limiting Fuse in series with n under oil fuse link.
|Beacon – In wireless networking, a beacon is a packet sent by a connected device to inform other devices of its presence and readiness.
|Beam Spread – With regard to outdoor light, the angle between the two directions in a plane in which the intensity is equal to a stated percentage of the maximum beam intensity. The percentage is typically 10% for floodlights and 50% for roadway luminaries.
|Belt – Refers to a lineman’s climbing belt.
|Bias Current – The current used as a bias quantity in a biased relay.
|Biased Relay – A relay in which the characteristics are modified by the introduction of some quantity, and which is usually in opposition to the actuating quantity.
|Bikeway (Lighting) – Any road, street, path or way that is specifically designated as being open to bicycle travel, regardless of whether such facilities are designed for the exclusive use of bicycles.
|BIL – 1) See Basic Insulation Level. 2) See Basic Impulse Level.
|Blackout – The complete interrupting of load to an electric utility customer or group of customers.
|Blowing – The act of installing fiber optic cable into a duct using air pressure.
|Bluetooth – A wireless computing and telecommunications specification that defines how mobile personal computing devices work with each other and with regular computers and phone systems within a close range.
|Bonding – The joining of metallic parts to form an electrically conductive path that will ensure electrical continuity and the capacity to conduct any current to be present in a safe manner.
|Boomer – A lineman that moves from job to job.
|Boost Charge – A charge applied to a battery which is already near a state of full charge, usually of short duration.
|Booster Transformer – A current transformer whose primary winding is in series with the catenary and secondary winding in the return conductor of a classically-fed A .C. overhead electrified railway.
|Breakdown Voltage – The voltage at which a dielectric material fails.
|Breaker – See “Circuit breaker”.
|Brownout – Refers to a reduction of voltage on the system. This dims the lights as a means of conserving energy.
|Buck – The act of lowering the voltage.
|Bucket – A basket or platform that supports one or more linemen attached to a boom of a truck.
|Bucket Truck – An aerial lift truck used to lift men high enough to work on overhead lines.
|Building Wire – Conductors and cables used in commercial building construction.
|Bulb – The outer enclosure of a light source; usually glass or quartz.
|Bulb Envelope Lighting) – The outer enclosure of a light source; usually glass or quartz.
|Bull Line – Heavy line used to pull wire or cable into a conduit or into an overhead configuration.
|Bull Wheel – A reel device used to hold tension during the wire installation process.
|Bunched Stranding – A term applied to a number of wires twisted together in one direction in one operation without regard to their geometric arrangement.
|Bundle – Multiple cables used to form one phase of an overhead circuit.
|BURD – Buried Urban Residential Distribution.
|Burden – Load imposed by an electronic or electrical device on the measured input circuit, expressed in volt-amps.
|Buried Urban Residential Distribution – Refers to the system of electric utility equipment installed below grade.
|Bus – A conductor, which may be a solid bar or pipe, normally made of aluminum or copper, used to connect one or more circuits to a common interface. An example would be the bus used to connect a substation transformer to the outgoing circuits.
|Bushing – An insulator having a conductor through it, used to connect equipment to a power source.
|Bushing Well – See Universal Bushing Well.
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