Podcast
Questions and Answers
Why is a schematic diagram useful in electrical troubleshooting and design?
Why is a schematic diagram useful in electrical troubleshooting and design?
- It specifies the exact physical dimensions of the electrical components.
- It provides a visually simplified representation of the circuit, aiding in tracing and understanding its functionality. (correct)
- It lists all the parts required for the electrical control equipment.
- It shows the voltage levels at different points in the circuit.
When selecting switches for an electrical panel, which electrical parameters are most crucial to consider?
When selecting switches for an electrical panel, which electrical parameters are most crucial to consider?
- Rated current and rated voltage. (correct)
- Material and weight.
- Shape and texture.
- Color and size.
When connecting a splice wire around a terminal screw, why should the wire be turned in the same direction as the screw tightens?
When connecting a splice wire around a terminal screw, why should the wire be turned in the same direction as the screw tightens?
- To improve conductivity by increasing surface contact.
- To ensure the wire doesn't loosen as the screw is tightened. (correct)
- To make the connection look neater.
- To prevent corrosion of the screw.
Why is rubber insulation tape preferred in some splicing applications?
Why is rubber insulation tape preferred in some splicing applications?
In electrical installations, what is the primary purpose of fittings like locknuts and bushings when used with mechanical components?
In electrical installations, what is the primary purpose of fittings like locknuts and bushings when used with mechanical components?
What is the main advantage of using Rigid Steel Conduit (RSC) or Intermediate Metal Conduit (IMC) for service entrances?
What is the main advantage of using Rigid Steel Conduit (RSC) or Intermediate Metal Conduit (IMC) for service entrances?
Condulets are a popular choice for exposed conduit support. What makes them particularly useful in these applications?
Condulets are a popular choice for exposed conduit support. What makes them particularly useful in these applications?
What is the primary function of a mechanical lug when used to connect a conductor?
What is the primary function of a mechanical lug when used to connect a conductor?
According to code, what is the minimum rating a circuit breaker must have when protecting a 40A motor load?
According to code, what is the minimum rating a circuit breaker must have when protecting a 40A motor load?
Why is it recommended to use a 'pencil down' technique when skinning insulation from a small wire?
Why is it recommended to use a 'pencil down' technique when skinning insulation from a small wire?
Flashcards
Schematic Diagram
Schematic Diagram
A diagram used to troubleshoot or design electrical control equipment and simplifies tracing circuits.
Rated Current and Voltage
Rated Current and Voltage
The rated current and rated voltage are the electrical parameters applied or labeled on switches.
Rubber Insulation Advantage
Rubber Insulation Advantage
Using rubber insulation tape in splicing does not absorb much moisture.
Mechanical Device Location
Mechanical Device Location
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Service Entrance Conduit
Service Entrance Conduit
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Appliance Outlet Box
Appliance Outlet Box
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Mechanical Lug Use
Mechanical Lug Use
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Joining PVC Conduit
Joining PVC Conduit
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Circuit Breaker Rating
Circuit Breaker Rating
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Bonding Jumper
Bonding Jumper
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Study Notes
- A schematic diagram is used to troubleshoot or design the installation of electrical control equipment and simplifies the tracing of the circuit.
- Rated current and rated voltage are electrical parameters applied or labeled to all kinds of switches.
- The end of a splice wire is turned around the terminal screw in the same direction when tightening a terminal screw connection to ensure the wire will not turn off.
- Rubber insulation tape is used in splicing because it does not absorb much moisture.
- Locknuts, bushings, or connectors belong to fittings for mechanical use, not electrical.
- RSC/IMC conduit is typically used in the installation of service entrances.
- Condulets are used for exposed conduit support.
- Utility boxes are used for the installation of appliance outlets.
- Mechanical lugs are used for crimping a conductor for both splicing and termination.
- PVC solvent is the best adhesive material for joining a PVC conduit.
- A circuit breaker used with a 40A motor load current should have a rating not less than 125% of the full load.
- A live duplex wire can be quickly and safely cut one-by-one using a diagonal cutter.
- When measuring load current, an ammeter is connected in series with the load.
- When measuring load resistance, an ohmmeter is connected across the terminals of the load.
- The ampacity of #8.0 sq.mm THW wires is 50 amperes.
- In the event that the load schedule reflects a 20AT/2.0 sq.mm lighting branch circuit with an overrated circuit breaker, wait for your superior to do the corrections.
- A 115-volt incandescent bulb with 264.5 ohms of resistance will draw 0.43 amps of current.
- When measuring ballast resistance, it is necessary that the source is de-energized to determine if it is defective or good.
- A circuit breaker is an electrical protective device that protects electrical equipment from current surges and overloads.
- A bonding jumper is the connection between the grounded circuit conductor and the equipment grounding conductor at the service.
- A magnetic lock is an output device.
- THW wires are a type of wire used mostly in industrial wiring that have thermoplastic heat and moisture resistance.
- An exit button is an example of an input device.
- When skinning a small wire use "pencil down" rather than cut it square to decrease the danger of nicking the wire.
- The minimum conduit size commonly used in laying out auxiliary devices is 1/2" diameter.
- An electrician should always have his tools in good working condition because defective tools can cause accidents or damage to equipment.
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