Electrical Contractor Terminology – Glossary B
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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