SACA c201 Electrical Systems Certification Study
Guide
Ground
The connection of an electrical circuit to the Earth.
Ten rules of electrical safety
A set of guidelines to ensure safe practices when working with electricity.
Lockout / tag out
A safety procedure used to disable machinery or equipment to prevent hazardous energy
release.
Types of electrical current
Direct current (DC) and alternating current (AC).
Circuit tester
A device used to test the presence of voltage in an electrical circuit.
Components of an electrical circuit
Power source, load, conductor, and control device.
Types of power supplies
DC power supply and AC power supply.
Schematic symbols
Visual representations of electrical components used in electrical schematics.
Manual switch operators
Toggle switch, push button switch, selector switch, key switch, and rotary switch.
Electrical output devices
, Lamp, motor, solenoid, buzzer, and relay.
Voltage
The electrical potential difference between two points in a circuit. Unit of measurement: volts
(V).
Voltmeter
A device used to measure voltage in an electrical circuit.
Voltage characteristics in series and parallel circuits
In series circuits, voltage adds up. In parallel circuits, voltage is the same across all components.
Current
The flow of electric charge in a circuit. Unit of measurement: amperes (A).
Ammeter
A device used to measure current in an electrical circuit.
Current characteristics in series and parallel circuits
In series circuits, current is the same across all components. In parallel circuits, current adds up.
Ohmmeter
A device used to measure resistance in an electrical circuit.
Resistance characteristics in series and parallel circuits
In series circuits, resistance adds up. In parallel circuits, the total resistance is less than the
smallest resistance.
Continuity
The uninterrupted flow of current in an electrical circuit.
Metric prefixes used on DMM
Guide
Ground
The connection of an electrical circuit to the Earth.
Ten rules of electrical safety
A set of guidelines to ensure safe practices when working with electricity.
Lockout / tag out
A safety procedure used to disable machinery or equipment to prevent hazardous energy
release.
Types of electrical current
Direct current (DC) and alternating current (AC).
Circuit tester
A device used to test the presence of voltage in an electrical circuit.
Components of an electrical circuit
Power source, load, conductor, and control device.
Types of power supplies
DC power supply and AC power supply.
Schematic symbols
Visual representations of electrical components used in electrical schematics.
Manual switch operators
Toggle switch, push button switch, selector switch, key switch, and rotary switch.
Electrical output devices
, Lamp, motor, solenoid, buzzer, and relay.
Voltage
The electrical potential difference between two points in a circuit. Unit of measurement: volts
(V).
Voltmeter
A device used to measure voltage in an electrical circuit.
Voltage characteristics in series and parallel circuits
In series circuits, voltage adds up. In parallel circuits, voltage is the same across all components.
Current
The flow of electric charge in a circuit. Unit of measurement: amperes (A).
Ammeter
A device used to measure current in an electrical circuit.
Current characteristics in series and parallel circuits
In series circuits, current is the same across all components. In parallel circuits, current adds up.
Ohmmeter
A device used to measure resistance in an electrical circuit.
Resistance characteristics in series and parallel circuits
In series circuits, resistance adds up. In parallel circuits, the total resistance is less than the
smallest resistance.
Continuity
The uninterrupted flow of current in an electrical circuit.
Metric prefixes used on DMM
