Electrical Material and Components Quiz

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Questions and Answers

What is the service entrance defined as according to the National Electrical Code (NEC)?

  • The conductor and equipment for delivering energy from the electricity supply system to the wiring system of the premises served. (correct)
  • The cable that connects the electric power meter to the nearest utility pole.
  • The point where the service drop connects to the building supply.
  • The wire extending from the street main duct to the building's switchboard.

Where is the service entrance point for an overhead service wire typically located?

  • At the transformer
  • At the weather head (correct)
  • At the electric power meter
  • At the street main duct

What does the acronym NEC stand for in relation to electrical codes?

  • National Electric Company
  • National Energy Code
  • National Electrical Code (correct)
  • National Electrical Circuit

What is a service drop in relation to overhead service entrance?

<p>The connection from the nearest utility pole to the building's service entrance point (B)</p> Signup and view all the answers

Which type of building might use an overhead service entrance?

<p>Industrial, commercial, and residential houses (D)</p> Signup and view all the answers

What is included in the types of service entrance mentioned in the text?

<p>Overhead Service and Underground Service (A)</p> Signup and view all the answers

What does the Underground Service Entrance consist of?

<p>Conduit extending from the building to the property line and tapping to the main (A)</p> Signup and view all the answers

What is the responsibility defined by the Service Point?

<p>Defining responsibilities between the utility provider and the customer (C)</p> Signup and view all the answers

What is included in the Service Entrance Equipment as per the text?

<p>Method of measuring power, method of cutting off power, and overcurrent protection devices (C)</p> Signup and view all the answers

What is the Electric Meter used for?

<p>Measure and record electrical energy consumed (D)</p> Signup and view all the answers

What is a Pole Mounted Transformer?

<p>Transformer mounted overhead on poles (A)</p> Signup and view all the answers

What does a Step-down Transformer do?

<p>Reduce building system voltages to useable levels (D)</p> Signup and view all the answers

How is a Single-phase Transformer defined?

<p>Has a single primary winding and a single secondary winding (D)</p> Signup and view all the answers

What are Transformers used for?

<p>Transmitting and distributing power from the power plant to a substation (B)</p> Signup and view all the answers

What is included in a Panel Board?

<p>Cabinet or cutout enclosure placed in or against a wall or partition (C)</p> Signup and view all the answers

What does a Step-up Transformer do?

<p>Has a secondary voltage greater than its primary voltage (A)</p> Signup and view all the answers

What is the purpose of the service entrance according to the National Electrical Code (NEC)?

<p>Delivering energy from the electricity supply system to the wiring system of the premises served.</p> Signup and view all the answers

What are the two types of service entrance mentioned in the text?

<p>Overhead Service and Underground Service</p> Signup and view all the answers

Where is the service entrance point typically located for an overhead service wire?

<p>At the building service entrance point</p> Signup and view all the answers

What is the common type of service wire installed by electric power supply companies for industrial, commercial, and residential houses?

<p>Overhead Service Entrance</p> Signup and view all the answers

What is connected from the nearest utility pole to the building service entrance point for an overhead service entrance?

<p>Service drop</p> Signup and view all the answers

What is the service drop connected to for an overhead service entrance?

<p>Weather head, down to the electric power meter</p> Signup and view all the answers

What is the purpose of the Electric Meter?

<p>Measure and record electrical energy consumed</p> Signup and view all the answers

What is the responsibility defined by the Service Point?

<p>Defines the responsibilities between the utility provider and the customer</p> Signup and view all the answers

What does a Pole Mounted Transformer refer to?

<p>Transformer mounted overhead on a pole</p> Signup and view all the answers

What is the function of a Panel Board?

<p>Acts as a power panel, load center, or distribution center</p> Signup and view all the answers

What is the purpose of a Step-down Transformer?

<p>Reduces building system voltages to useable levels</p> Signup and view all the answers

What are Transformers used for?

<p>Transmitting and distributing power from the power plant to a substation</p> Signup and view all the answers

What is the Underground Service Entrance made of?

<p>Raceway (conduit) extending from the building to the property line</p> Signup and view all the answers

What does a Step-up Transformer do?

<p>Steps up the voltage applied to it</p> Signup and view all the answers

What is the purpose of the Service Entrance Equipment?

<p>Receives the service entrance conductors and contains metering equipment, main disconnect, and overcurrent protection devices</p> Signup and view all the answers

What is the primary purpose of a Single-phase Transformer?

<p>To have a single primary winding and a single secondary winding</p> Signup and view all the answers

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