LESSON 3 Flashcards
underground (buried) service entrance conductors.
Service Lateral
overhead wires extend from a pole-mounted distribution transformer to the building’s service entrance
Service drop
conductors that carry power from the transformer through a metering device .
Service Entrance Conductors
it is an industrial facility that houses the prime mover
Power Station
it includes the components that connect the utility-supplied wiring to the service disconnect, excluding the utility’s metering equipment.
Service Entrance
receives the service entrance conductors
Service Entrance Equipment
it is a required part of the service entrance equipment that allows electrical service from the utility company
Service Disconnect
a mechanical switching device used to isolate a circuit or an equipment from the supply side.
Disconnect (Safety Power Switch)
it is a large cabinet or assembly of metal cabinets in which is connected disconnecting switches, overcorrect protection devices
Switchboard
it is one or more metal cabinets that serve as a single unit, including buses, automatic overcurrent protection devices
Panelboard
unit of electrical distribution system, which splits the electrical power to various branches or circuits.
Panelboard
a broadterm that describes a wide variety of switching devices that all fulfill a common need
Switchgear
are used in transmitting and distributing power from the power plant to a substation
Transformers
are typically used in buildings to reduce building system voltages to useable levels.
Step-down transformers
they safeguard the building service or an individual circuit from excessive current flows
Overcurrent protection (OCP) devices
It is an overcurrent protective device with a circuit opening fusible part that is heated and severed by the passage of overcurrent through it.
Fuse
is the highest current it can carry continuously without exceeding a specific temperature limit (e.g., without overheating).
Overcurrent Rating
it is the current that a fuse is able to interrupt without being destroyed or causing an electric arc with unacceptable duration.
Interrupting Capacity
it is a broad category of electrical or electronic machine or instrument designed to perform a specific mechanical, chemical through the use of electrical energy.
Utilization equipment
it an end-use piece of utilization equipment designed to perform a specific function
Electric Appliance
it is a component in an electrical system that is designed to carry but not use electricity
Electrical Device
it is the location in a branch circuit where electricity is used.
Outlet
it is a female connecting device with slotted contacts
Receptacle
it is a male connecting device that has two or more prongs
Plug
it is an electrical component that can break an electrical circuit
Switch
used to control a single or group of lamps from one location. The switch has only two terminals.
SPST (single pole single throw) switch
used to control a single lamp from two different locations. The switch has three terminals.
SPDT (single pole double throw) or three-way switch
used to control a single lamp from three or more different locations. The switch has four terminals.
Four-way switch
it is any material that conducts electrical current.
Electrical Conductor
it is an electrical conductor (usually copper or aluminum) that serves as a common connection for two or more electrical circuits.
Bus bar
contains more than one conductor bundled together in a factory assembly of wires
Cable
conductor encased within material of composition or thickness recognized by the PEC as electrical insulation.
Insulated Conductor
conductor encased within material of composition or thickness that is not recognized by the PEC as electrical insulation
Covered Conductor
a conductor having no covering or electrical insulation whatsoever.
Bare Conductor
a stranded conductor or a group of conductors insulated from one another
Cable
an enclosed channel for holding wires, cables or busbars.
Raceway
- Single insulated conductor of solid or stranded bare annealed high conductivity copper, with thermoplastic lead-free insulation of PVC (Polyvinyl Chloride) and protected by a nylon jacket; normally designed to operate up to 600 V.
Thermoplastic Cables
it is the maximum current it can carry continuously without exceeding the temperature limitations of the insulation and sheathing material
Conductor’s Ampacity
are electrical boxes and cabinets made of metal
Enclosures
are metal and non-metallic (plastic) enclosures that hold devices
Electrical boxes
are a special type of electrical box used to enclose conductor connections.
Junction boxes
commonly called junctions in the trade.
Connections
is a type of junction box that allows access to a raceway for snaking conductors through the raceway.
Pull box
is an enclosed channel such as a conduit, tube, or gutter designed for holding wires, cables, or busbars.
Raceway
is of a standardized, factory-assembled enclosure consists of outer duct-like housing, bus bars, and insulators.
Busway
are metal sheet or nonmetallic, flame-resistant plastic troughs that serve as a housing that encloses and protects conductors
Wire gutters or wireways
found in refrigerators, freezers, dishwashers, kitchen sink waste disposal, portable kitchen appliances
Electric Motors
