Electrical Panel Boards and Utilization Equipment

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What is the unit of electric resistance?

Volt

Watt

Ampere

Ohm (correct)

Which unit represents the rate of doing electrical work?

Ohm

Volt

Watt-hour (correct)

Coulomb

According to Ohm's Law, what happens to the current in a circuit if the resistance increases?

Voltage increases

Current increases

Current decreases (correct)

Current remains the same

What is the unit of electric power?

Watt Signup and view all the answers

Which component in an electric field moves a charge between two points?

Volt Signup and view all the answers

What does electric load control aim to achieve?

Reduce demand charge Signup and view all the answers

What is the main purpose of an Automatic Transfer Switch (ATS)?

To automatically supply emergency service on failure of normal power Signup and view all the answers

How does a Fuse function in an electrical circuit?

It allows all current passing through the circuit to pass through it before melting Signup and view all the answers

Which protective device functions as a switch as well as an overcurrent protector?

Circuit Breaker Signup and view all the answers

What material is commonly used to make Wall Plates or Faceplates?

Plastic (Bakelite) Signup and view all the answers

What is the function of Ground Fault Circuit Interrupters (GFCI) in an electrical system?

To provide ground fault protection and function as a circuit breaker Signup and view all the answers

Where are the protective devices housed in an electrical system?

In panelboards Signup and view all the answers

What is the function of panel boards and sub-panel boards in an electrical system?

To control and protect sub feeders and branch circuits Signup and view all the answers

What does a bus do in an electrical system?

Collect, carry, and distribute large electric currents Signup and view all the answers

What is the purpose of a grounding electrode in an electrical system?

Establish a ground connection Signup and view all the answers

What happens when a fuse melts in an electrical circuit?

It automatically interrupts the circuit to prevent excess current Signup and view all the answers

How does a circuit breaker differ from a fuse in an electrical system?

A circuit breaker can be reclosed and reused, while a fuse needs replacement Signup and view all the answers

Where are the switches, fuses, and circuit breakers mounted for controlling branch circuits in an electrical system?

Panel boards Signup and view all the answers

Where are lighting and outlet loads typically connected in a Three Phase AC electrical system?

Between any phase leg and a neutral line Signup and view all the answers

What is the purpose of a transformer vault in a large building?

To house a transformer and auxiliary equipment Signup and view all the answers

What is the function of a standby generator in a building's electrical system?

To act as a backup power source during outages Signup and view all the answers

What is the purpose of a service entrance conductor in an electrical system?

To extend from a service drop to the building's equipment Signup and view all the answers

What is the definition of a line drop in a power line system?

The decrease in voltage between two points caused by resistance or leakage Signup and view all the answers

What is the role of a substation in an electrical system?

To step up or down voltage levels Signup and view all the answers

What is another name for Non-Metallic Sheathed Cable?

ROMEX Signup and view all the answers

Which type of cable is specifically designed for installation in cable trays, raceways, or where supported by wire?

Power and Control Tray Cable (Type TC) Signup and view all the answers

What distinguishes Shielded Non-Metallic Sheathed Cable (Type SNM) from Non-Metallic Sheathed Cable (Type NM)?

Covering within an overlapping spiral metal tape Signup and view all the answers

Which type of cable is recommended for direct burial in the ground as feeder or branch circuit?

Service Entrance Cable (Type SE or USE) Signup and view all the answers

What is the main purpose of Flat Conductor Cable (Type FCC)?

Placement in square structural channels Signup and view all the answers

Which cable type is provided with an overall covering and is primarily used for service wire?