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