Test 1 Flashcards
What voltage do you read in a load center hot buss to hot buss?
240vac
What does HP stand for
Horse power
What is the low voltage side of the transformer?
Secondary side
What does NEMA stand for?
National Electrical manufacturers association
What does DC stand for?
Direct current
What does NC stand for?
Normally closed
X2 should always be _______ on a control transformer?
Neutral
Draw normally open control tips
What four things make up an Electric circuit?
Wire
Load
Switching element
Source voltage
What is the wearable parts of a DC motor?
Brushes
Changing ______ ______ of the three leads on a VAC motor will change rotation
Any two
The _____ ______ will give you the info of the motor
Name plate / data plate
FLA stands for?
Full Load Amps
Four types of motors?
Three phase
Dc
Single phase
Single phase capacitor start
Size of motor starter is determined by what?
Horsepower of the motor
A __________ can be temporarily used to fix a electrical issue
Jumper
Draw the symbol for a fuse.
——
| |
——-
| |
| |
| |
——
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——
What is used to protect the wire tag?
Back taping
DC motor acts as a _________ if it is turned with no power supply.
Generator
Can you be shocked by a generator?
YES
The initial surge of power going out to the motor until it comes up to speed?
In rush current
Device that provides an adjustable time period to perform a function?
Timing relay
Symbol for ohms?
Omega sign
What should a float switch for a sump pump be wired in when in the pit?
Normally open
Home wire?
Romex
What wire gauge for lighting circuit?
14 AWG
Control transformer should be wired?
Single phase
How many receptacles on a 20 amp circuit
10
AC stands for
Alternating current
What protects motor from high current?
Overloads
What do we do to a motor to check proper rotation?
Bump test
How much voltage is supplied to a control transformer ?
480vac
IEC stands for?
International electrotechnical commission
What gauge wire for receptacle circuit?
12 AWG
What wire never goes to a switch?
Neutral
Voltage must be supplied to the _____ of a magnetic starter so that the moveable tips close and supply power.
Coil
AWG stands for?
American wire gauge
What protects other receptacles?
GFCI
Used to keep motor running without holding start button?
Seal in tips
Stop button at resting state?
Normally closed
Used to protect control transformer?
Control fuse
Used to make a motor run?
Motor starter
What wire is landed on gold screw?
Hot
A _____ takes 480 vac to 240vac
Transformer
A _______ reads insulation value of a motor or wire?
Megger
To change direction on a DC motor?
Change polarity
What type motor needs a boast to get going?
Single phase capacitor start
How the capacitor in a single phase capacitor start motor is discharged?
Shorted
480 vac high voltage transformer is wired how?
123
4 5 6
7 8 9
What do you use for future wire pulls?
String
What size breaker on a receptacle circuit?
20 amp
20 HP and above motor is wired how?
Delta
Draw a normally open start button
RPM stands for?
Revolutions per minute
A good motor will read what phase to phase?
.1 or above ohms
What do we use to show motor is off or on?
Indicating light
Multiple start buttons should be wired in?
Parallel
What size wire for dryer or range?
10 AWG
If motor is need to be wired in auto or manual / jog we use what?
Selector switch
A ________ ________ is Wired into the circuit to control power to another component in the circuit.
Control relay
Green or bare wire?
Ground
What goes between three way switches to connect them?
Travlers
Colored wire in a motor starter bucket indicates what?
Control voltage
One phase of three phase is lost motor is humming is called what?
Single phasing
E stop is what type of button?
Maintain type
Start button is what type button?
Momentary type button
Under 20 hp motor is wired in what?
Wye
How many overloads to protect a three phase motor?
Three
How many amps does a 1500 watt 120vac heater draw?
12.5 amps I = p/e
Draw a stop button
Multiple stop buttons should be wired how?
Series
480 VAC low voltage motor?
456
T1-1/7
T2 - 2/8
T3 - 3/9
Draw normally closed set of contact tips.
What do you read on megger phase to ground for good motor?
550 M Ohms
What do you read on megger phase to phase?
0.0 M ohms
What does NEC stand for?
National electric code
Red box indicates what?
480vac
Black box indicates what?
250vdc
Black box with yellow stripes indicates what?
250vdc crane
Grey box indicates what?
120/240 vac
10 AWG = 35 amps with 30 amp breaker dryer / range
12 AWG = 25 amps with 20 amp breaker
Receptacle
14 AWG = 20 amps with 15 amp breaker
Lights
Receptacles that are going to be protected should be wired on the ________ side of the GFCI.
Load
What PPE must be worn when testing a live power source?
Arc flash
Pushing a fish tape toward a live power source, what precautions should be taken?
Piece of wood / cardboard / tape up wires
When checking a circuit with the power off to the circuit, your meter should be set on _____ to check the circuit.
OHMS
Troubleshooting the circuit hot is best to check for.
Source voltage
What voltage is supplied to a control transformer?
480vac
High voltage side of the transformer?
Primary
The _____ _____ should be hooked up to a gold screw on a receptacle?
Hot wire
A _____ ____ is a central location that distributes Electric through a home?
Load center
NO stands for?
Normally open
A green or bare copper wire should always be used as a _____ ?
Ground
When using your personal meter while checking a good motor, you will get a reading of ________ while reading phase to ground.
OL (open loop)
To change the direction of a DC motor, you can change the __________.
Polarity or armature
_________ is performed to find electrical fault or issues in a circuit
Troubleshoot
