Final Flashcards
OCPD
Over current protection device
2 types of AC circuits
Single and three phase
Current imbalance to trip a GFCI
3-5mA
DMM rating for an industrial setting
Cat 3
Hot bus to neutral in residential setting
120VAC
Symbol for LED
Can draw it on here but know it :)
NEMA
National electrical manufacturers association
Symbol for ground
Can’t draw it on here but know it :)
Tongs on your meter are used for?
Finding Amperage
Load center
Central location that distributes power throughout a building.
Breaker for 10 gauge wire
30 amp
What load consumes most energy
Electrical motors
Single phase is what
When you lose one phase of a 3 phase motor
What breaker is used for a light circuit
15 amp
What should you read when ringing out a good fuse
0.1 ohms or above (continuity)
ESD
Electrostatic discharge
What steps down from 480V to 240V
Transformer
Shows length, height, and depth in one view
Pictorial drawing
Red box
480 VAC
Phase to ground in 480 box should read
277VAC
What should you read when you meter a good fuse
0 volts
Colors for high voltage is US
Brown, orange, yellow (BOY)
5 things that make a circuit
Load, wire, switch, source voltage, and a breaker or fuse
Ghost voltage
Voltage in the air from magnetism
Hot side of a receptacal
Short side
What protects a motor when starting and running
Fuse (starting)
Overload (running)
North American waves around globe
60 times per second
Symbol for fuse
Can’t draw it on here but know it :)
Circuit that needs to be started by a person
Manual circuit
IEC
International electrotechnical commission
How to switch the rotation of a motor
Change any 2 of the 3 leads
What should you do before coupling and starting up a new motor
Bump test
What should you do before starting any repairs
Check for source voltage
Solenoid
Electrical component that converts electrical to linear mechanical force
NFPA70E
50V
Black box
250VDC
Diagram that shows the circuit
Ladder diagram
Diode
Flow in one direction
Electromagnetism
Magnetism from an electrical current passing through a conductor
Resistance and current are?
Proportional. One goes up other goes down
2 types of current
AC and DC
Most used fossil fuel for electric power
Coal
NO and NC mean
Normally open and normally closed
3 ways to increase magnetism
Increase voltage
Add an iron core
Add more windings
Bold lines in a print
Power circuit
Thin lines in a print
Control circuit
How many recepticals on a 20 amp circuit
10
What keeps a motor running after you let go of the start button
Seal in tips
DMM
Digital multimeter
