ACR 106 - Basic Electricity for HVAC/R Test 1
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Vocabulary study flashcards for Basic Electricity for HVAC/R (ACR 106 Test 1).
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26 Terms
Volt
The unit of measurement for electrical pressure.
Amp
The unit of measurement for electrical current.
Ohm
The unit of measurement for electrical opposition to current flow.
DMM
Stands for Digital MultiMeter.
Fuse
An electrical safety device that can be either a "one-time" fuse or resettable.
AFCI
Stands for Arc Fault Circuit Interrupter.
GFCI
Stands for Ground Fault Circuit Interrupter.
Amperage and Resistance Relationship
If amperage increases in a circuit, resistance decreases; if resistance decreases, amperage increases.
NEC
Stands for National Electric Code.
Load
Electrical devices that consume power, including heating elements, compressors, resistors, light bulbs, and fan motors.
Circuit Requirements
The three things needed to make a successful circuit: Source, Path, and Load.
Fuses and Breakers Rule
Safety components that must never be oversized in an electrical circuit.
Series Switches
Switches are wired in series with the loads they control.
Parallel Loads
Loads are typically wired in parallel with other loads.
Ohmmeter Safety Steps
The three steps before using an ohmmeter on a circuit: 1) Turn off the power, 2) Verify the power is off, and 3) Isolate the component.
NFPA
Stands for National Fire Protection Association.
Wire
An electrical conductor.
Conductor Diameter Effect
When an electrical conductor's diameter gets larger, resistance decreases; when its diameter gets smaller, resistance increases.
DMM Leads
The part of the DMM used to test voltage and ohms.
DMM Clamp
The part of the DMM used to test amps.
HVAC Common Voltages
Voltages technicians expect to come into contact with and measure, including 24v, 120v, 208v, 240v, 277v, and 480v.
Neutral Slot
The longer slot on a 120v receptacle.
Ground Slot
The round slot on a 120v receptacle.
Hot Slot
The shorter slot on a 120v receptacle.
Parallel Circuit Rule
The most important rule in a parallel circuit: VOLTS stay the same.
Series Circuit Rule
The most important rule in a series circuit: AMPS stay the same.