問題一覧
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Is an energy generated by friction
ELECTRICITY
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Electric flowing in a conductor
ELECTRIC CURRENT
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Commonly known as VOLTAGE
ELECTRIC POTENTIAL
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A friction that resist the pressure or force
ELECTRIC RESISTANCE
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A system of conductor and components
ELECTRIC CIRCUIT
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Frequently interchangeable used.
POWER AND ENERGY
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KIRCHOFF’S VOLTAGE LAW (KVL)
CONSERVATION OF ENERGY
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KIRCHOFF’S CURRENT LAW (KCL)
CONSERVATION OF CHARGE
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The decrease of electrical potential
VOLTAGE DROP
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the flow of electric current that takes places at a constant time
DIRECT CURRENT (DC)
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the flow of electric current that varies periodically
ALTERNATING CURRENT (AC)
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facility operated by any public power utility company for means for transmitting, distributing and utilizing electricity,
ELECTRIC SERVICE
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facility operated by any public power utility company for means for transmitting, distributing and utilizing electricity,
ELECTRIC SERVICE
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a fabricated assembly of insulated conductors enclosed in flexible metal sheath.
ARMORED CABLE (TYPE AC)
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– a factory assembled cable of one or more conductors each individually insulated and enclosed in a metallic sheath of interlocked Mineral Insulated Cable (Type MI) – a factory assembled conductor/s insulated with a highly compressed refractory mineral insulation enclosed in a liquid and gas tight continuous copper sheath.
METAL CLAD CABLE (Type MC)
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the illustration of how power distribution equipment proceeds from the service point to the utilization points in a progression of decreasing circuit capacity.
ELECTRICAL SYSTEM
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also known by the trade name ROMEX
Non-Metallic Sheathed Cable (Type NM or NMC)
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commonly known as Service Entrance
SERVICE CONNECTION
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– a factory assembly of two or more insulated conductors in an extruded core of moisture resistant and flame-retardant material covered within an overlapping spiral metal tape.
Shielded Non-Metallic Sheathed Cable (Type SNM)
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includes anything used, designed to be used, or installed for use
SERVICE EQUIPMENT
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part of an electrical wiring system
BRANCH CIRCUIT
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a moisture resistant cable used for underground connections including direct burial in the ground as feeder or branch circuit
Underground Feeder and Branch Circuit Cable (Type UF)
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a single or multi-conductor assembly
Service Entrance Cable (Type SE or USE)
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the act of installing wires (conductors and insulators) and cables with associated electrical outlets or loads (devices)
ELECTRICAL WIRING
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parts of electrical systems most often visible such as, lighting fixtures, switches, convenience outlets or receptacles.
ELECTRICAL OUTLETS
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a factory assembled two or more insulated conductors
Power and Control Tray Cable (Type TC)
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– an assembly of parallel conductors formed integrally with an insulating material web designed especially for field installation in square structural channels.
Flat Cable Assemblies (Type FC)
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consists of three or more flat copper conductors placed edge to edge separated and enclosed within a insulating assembly.
Flat Conductor Cable (Type FCC)
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form part of the electrical system by which electric energy is transferred from one point to specific points.
CONDUCTORS
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a single or multi-conductor solid dielectric insulated cable rated at 2,000 to 35,000 volts.
Medium Voltage Cable (MV)
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the use of aluminum conduit has increased greatly in recent years because of the weight advantage that aluminum has over steel the use of aluminum conduit has increased greatly in recent years because of the weight advantage that aluminum has over steel
ALUMINUM CONDUIT
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consists of an empty, spirally wound, interlocked armor steel or aluminum raceway.
FLEXIBLE METAL CONDUIT
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A separate classification of rigid conduit
NONMETALIC CONDUIT
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are channels or wiring accessories so designed for holding wires, cables and bus bars
RACEWAYS