General Definitions and Requirements

Question 1

What is an Adjustable Speed Drive?

Answer 1

Power conversion equipment that provides a means of adjusting the speed of an electric motor.

Question 2

What is Ampacity?

Answer 2

The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.

Question 3

What does AFCI stand for?

Answer 3

Arc-Fault Circuit Interrupter

Question 4

What is the purpose of a AFCI device?

Answer 4

to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected.

Question 5

What does Askarel mean?

Answer 5

A generic term for a group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media.

Question 6

define the term “Bonded (Bonding).”

Answer 6

it refers to connect or establish electrical continuity and conductivity.

Question 7

What is a Bonding Conductor or Jumper?

Answer 7

A reliable conductor to ensure the required electrical conductivity between metal parts
required to be electrically connected.

Question 8

What is the general purpose of the Branch Circuit?

Answer 8

A branch circuit that supplies two or more receptacles or outlets for lighting and appliances.

Question 9

Define Coaxial Cable.

Answer 9

A cylindrical assembly composed of a conductor centered inside a metallic tube or shield, separated by a dielectric material, and usually covered by an insulating jacket.

Question 10

What is Combustible Dust?

Answer 10

Dust particles that are 500 microns or smaller

Question 11

What is Composite Optical Fiber Cable?

Answer 11

A cable containing optical fibers and current-carrying electrical conductors.

Question 12

What is a connector, pressure (Solderless)?

Answer 12

A device that establishes a connection between two or more conductors or between one or more conductors and a terminal by means of mechanical pressure and without the use of solder.

Question 13

define Continuous Load?

Answer 13

A load where the maximum current is
expected to continue for 3 hours or more

Question 14

What is a Control Circuit?

Answer 14

The circuit of a control apparatus or system
that carries the electric signals directing the performance of the controller but does not carry the main power current.

Question 15

Define Selective Coordination

Answer 15

Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the selection and installation of overcurrent protective devices and their ratings or settings for the full range of available overcurrents, from overload to the maximum available fault current, and for the full range of overcurrent protective device opening times associated with those overcurrents.

Question 16

What is a Cord Connector?

Answer 16

A fitting intended to terminate a cord to a box or similar device and reduce the strain at points of termination and may include an explosionproof, a dust-ignitionproof, or a
flameproof seal.

Question 17

Explain the meaning of “Effective Ground-Fault Current Path”?

Answer 17

An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault
conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors.

Question 18

Ground-Fault Circuit Interrupter (GFCI)

Answer 18

A device intended for the protection of personnel that functions to de-energize a
circuit or portion thereof within an established period of time when a current to ground exceeds the values established for a Class A device (trip current to ground: 6mA)

Question 19

what is a Grounding Electrode?

Answer 19

A conducting object through which a
direct connection to earth is established

Question 20

describe a hoistway?

Answer 20

Any shaftway, hatchway, well hole, or other vertical opening or space in which an elevator or dumbwaiter is designed to operate.

Question 21

what is a Innerduct?

Answer 21

A nonmetallic raceway placed within a larger raceway.

Question 22

What is a Neutral Conductor?

Answer 22

The conductor connected to the neutral point of a system that is intended to carry current under normal conditions.

Question 23

define a Nonlinear Load

Answer 23

A load where the wave shape of the steady-state current does not follow the wave shape of the applied voltage.

Question 24

what is the purpose of Oil Immersion?

Answer 24

Electrical equipment immersed in a protective liquid in such a way that an explosive atmosphere that may be above the liquid or outside the enclosure cannot be ignited.

Question 25

Define Overcurrent

Answer 25

Any current in excess of the rated current of equipment or the ampacity of a conductor. It may result from overload, short circuit, or ground fault.

Question 26

Define Overload

Answer 26

Operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating. A fault, such as a short circuit or ground fault, is not an overload.

Question 27

explain what is a Plenum

Answer 27

A compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system.

Question 28

define Raceway

Answer 28

An enclosed channel designed expressly for holding wires, cables, or busbars, with additional functions as permitted in this Code.

Question 29

Name the five steps define in art.sect 110.3

Answer 29

Examination, Identification, Installation, Use, and Listing Product Certification of Equipment

Question 30

110.4 Voltages. The voltage rating of the electrical equipment shall not be ____ than the nominal voltage of the circuit to which is connected.

Answer 30

less

Question 31

110.6 Conductor sizes. Conductor size are expressed in AWG or in circular mils

Answer 31

America Wire Gage

Question 32

110.10 Circuit impedance, Short Circuit Current Ratings, and Other Characteristics shall be selected and coordinated to…

Answer 32

permit the circuit protective devices used to clear a fault without extensive damage to the electrical equipment of the circuit.

Question 33

110.14 Electrical Connections

Answer 33

Conductors of dissimilar metals shall not be intermixed in a terminal or splicing connector where physical contact occurs between dissimilar conductors, unless the device is identified for the purpose and conditions of use.

Question 34

110.14(A) Define Terminals

Answer 34

Connection of conductors to terminal parts shall ensure a thoroughly good connection without damaging the conductors and shall be made by means of pressure connectors, solder lugs, or splices to flexible leads.
Connection by means of wire-binding screws or studs and nuts that have upturned lugs or the equivalent shall be permitted for 10 AWG or smaller conductors.

Question 35

110.14(B) Define Splices

Answer 35

Conductors shall be spliced or joined with splicing devices identified for the use or by brazing, welding, or soldering with a fusible metal or alloy.
All splices and joints and the free ends of conductors shall be covered with an insulation equivalent to that of the conductors or with an identified insulating device.

Question 36

110.16 (B) Arc-Flash Hazard Warning. A permanent label shall be field or factory applied to service equipment rated 1200 amps or more. The label must contain the following information:

Answer 36

Nominal System Voltage
Available fault current at the service overcurrent protective devices
The clearing time based on the available fault current at the service equipment
The date the label was applied

Question 37

110.24 (A) Available Fault Current. Service equipment shall be legibly marked in the field with the maximum available fault current and …

Answer 37

The calculation shall be documented and made available to those authorized to design, install, inspect, maintain, or operate the system.