Studied by 96 PeopleTags & Description
Color ____ is a technique used to identify switch terminal screws through various colors.
coding
A _____ label is a stamped or printed icon that indicates that a device or material has been approved for consumer use by Underwriters Laboratories Inc.
UL
A _______ is a short groove that indicates the amount of insulation that must be removed from a wire so the wire can be properly inserted into a switch.
strip gauge
A _____ is a contact device installed for the connection of plugs and flexible cords to a supply current to portable electrical equipment.
receptacle
_____ receptacles include a long neutral slot, a short hot slot, and a U-Shaped ground hole.
Standard
A ______ is a fast-acting receptacle that detects low levels of leakage current to ground and opens the circuit in response to the leakage (ground fault).
ground fault circuit interrupter
The terminals of a ______ switch are identified as common, traveler A, and traveler B.
3-way
______ are often called convenience outlets.
receptacles
Steel, bronze, and green colors are typically used on receptacle ______.
terminal screws
A ______ receptacle is used to minimize problems in sensitive applications or areas of high electrical noise.
isolated bronze
A _________ is any current above the level that is required for a dangerous shock.
ground fault
A _____ indicates the minimum safety requirements and is not meant to serve as a quality comparison between manufacturers.
UL label
_______ is a type of cable that consists of three insulated electrical conductors held together and protected by a strong plastic jacket.
nonmetallic sheathed cable
The 14 in a cable marked 14/2 indicates ______.
the size of the wire
Receptacle boxes are _____ shaped.
square, octagonal, and rectangular
A _____ is a round identification punched into the metal of a box and by unpunched narrow strips of metal.
knockout
Boxes are typically secured by...
nails
When securing cables to a box, at least ___'' of wire must extend beyond the bottom of the box to allow enough wire for making connections to receptacles and switches.
8
When notches are used to run cable through stud walls, the cable run must be protected from nails by a steel plate at least ___'' thick.
1/16
NM and NMC cable must be supported or secured every ___'of cable run and within 12'' of a box.
4 1/2
A ____ lamp is an electric lamp that produces light by the flow of current through a tungsten filament inside a gas-filled, sealed glass bulb.
incandescent
A ____ lamp is a low-pressure discharge lamp in which ionization of mercury vapor transforms ultraviolet energy generated by the discharge of light.
florescent
A ____ lamp is an HID lamp that operates at a low vapor pressure and uses sodium as the vapor.
salt
A ____ lamp is an HID lamp that produces light by electrical discharge through mercury vapor.
mercury-vapor
A ____ ballast is a ballast that connects a coil in series with the power line leading to the lamp.
reactor
A _____ is an assemblage of equipment installed for switching, changing, or regulating the voltage of electricity.
substation
____ are covered with an insulating material that is available in different colors.
conductors
As the length of the conductor [increases/decreases], its resistance increases.
increases
____ is the resistance of a conductor having a specific length and cross-sectional area.
resistivi
As the ____ of a conductor increases, the free electrons between he atoms move faster and their vibrations increase.
temperature
Large wire sizes allow more ___ to flow, which produces a stronger magnetic field.
current
____ are generally added to a circuit to control the amount of current flowing in a circuit or branch of the circuit.
inductors
A ____ is an electric device specifically designed to store a charge of energy.
capacitor
A ____ is any device that converts electrical energy into motion, heat, light or sound.
load
The ___ rating of a transformer indicates the amount of power the transformer can safely deliver.
power
When sizing a transformer, the primary side of the transformer must have a rating equal to the supply ____.
voltage
Temperature ____ in a transformer is the temperature of the windings above the existing ambient temperature.
rise
A ____ configuration is a transformer connection that has one end of each transformer coil connected together.
wye
A ______ configuration is a transformer connection that has each transformer coil connected end-to-end to form a closed loop.
delta
____ is a light-gauge electrical pipe often referred to as thin-wall conduit.
electrical magnetic tubing
_____ cable is very popular in residential wiring because it is inexpensive and easy to install.
nonmetallic sheathed cable
Type ____ cable is a nonmetallic-sheathed cable that has the conductors enclosed within a nonmetallic jacket and is the type typically used for dry interior wiring.
NM
_____ is the placement of electrical boxes and wires before wall coverings and ceilings are installed.
rough-in
A service panel should be located close to the ____ to avoid costly runs to major appliances.
kitchen
___ temperature is the average temperature of the air that cools a transformer over a 24-hour period.
standard ambient
____ is a force that acts at a distance and is caused by a magnetic field.
magnetism
____ is the magnetic field produced when electricity passes through a conductor.
electromagnetism
The more coil turns a solenoid has, the ___ the linear force.
greater
A ____ is an electrical device that uses electromagnetism to change voltage from one level to another or to isolate one voltage to another.
transformer
____ inductance is the effect of one coil inducing a voltage into another coil.
mutual
The ____ coil (input side) of the transformer is the coil to which the voltage is connected.
primary
A ___ transformer is a transformer in which the secondary coil has fewer turns of wire than the primary coil.
step-up
____ loss is caused by the resistance of copper wire to the flow of current.
copper
____ transformers are step-down transformers that are used to lower the voltage to the control circuit in which the control switches, contactors, and motor starters are connected.
instrumental
A _____ box is an electrical device designed to house electrical components and protect wiring connections.
receptacle
____ grounding is a grounding method where the ground wire is attached directly to an electrical component such as a receptacle.
component
_____ grounding is a grounding method where two ground wires are used to connect an electrical device to a ground screw in the box then to system ground.
pigtail
Metallic-sheathed cable or ____ cable provides additional protection to wires by using a metal outer jacket.
armored
_____ is a rugged protective tube through which insulated conductors are pulled.
conduit
_____ is the term used for the process of pulling wires through conduit.
fishing
A service entrance for a single family dwellings require a minimum _____ a capability.
100
A ____ service entrance has all service wires running from a utility pole to a service head, where the meter socket and riser are firmly secured to the exterior of a dwelling, where the service panel is placed inside.
overhead riser
A ___ service entrance has all service wires buried underground.
lateral conduit
In typical residential service, ___V is obtained between the red and black service wires.
230
Any single circuit breaker can only furnish power to one ___V circuit.
115
A service ____ consists of overhead wires and devices that connect the company power lines to a residence.
drop
The minimum clearance for service drop conductors passing over an alley or street is ____'.
18
A service ____ is any service to a residence that is achieved by burying the wires underground.
lateral
A generator is an electromechanical device that converts mechanical energy into ____ energy by means of electromagnetic induction.
electrical
Typical home emergency standby generators range in capacity from 6500 W to ___W.
40,000
Generators are chosen based on capacity in ____.
watts
Rated voltage is a voltage range that is +-___% of ideal voltage.
10
A ___ power interruption is a decrease to 0 V on one or more power lines lasting between 3 sec and 1 min.
temporary
Service entrances provide all of the equipment necessary to obtain ___ and distribute it throughout a residence.
electricity
A service ___ has service wires run from a utility pole to a service head on or above the residence.
drop
A service ___ has electrical service wires to a residential buried in the ground.
lateral
Residential services has a standard voltage of ___V.
115/230
The white wire is the ____ in the service panel.
neutral
Inside the service panel, where the wires are terminated, metal conductors called ___ bars continue the system.
bus
Fastening the handles of circuit breakers together ensures that, in the event of a ___V overload, both hot lines are disconnected simultaneously.
230
The service drop is owned and maintained by the...
power company
When a ____ rise of used, the service installation is shared by the homeowner and the utility company.
pole
When a service entrance originates from a transformer pad, special ___ cable is used to make an insulation.
direct burial
___ or finishing the service requires the installation of internal service conductors, circuit breakers, and branch circuit wiring.
trimming out