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NEC 2008 > Article 110 > Flashcards

Article 110 Flashcards

1
Q

In judging equipment for approval, considerations such as the following shall be evaluated:

A

110.3 Examination, Identification, Installation, and Use of Equipment

  1. Examination
  2. Suitabilit
  3. Mechanical Strength
  4. Wirebending and connection space
  5. Electrical insulation
  6. Heating effects under normal conditions of use and also under abnormal conditions likely to arise in service
  7. Arcing effects
  8. Classifications by type, size, voltage, current capacity, and specific use
  9. Other factors that contribute to the practical safeguarding of persons using or likely to come in contact with the equipment.
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2
Q

Listed or labled equipment shall be installed and used in accordance with any instructions included in the listing or labeling:

True or False

A

True

  1. 3 Examination, Identification, Installation, and Use of Equipment
  2. 3(B)

Installation of Use.

Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.

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3
Q

Conductors shall be ____ unless otherwise provided.

A

Copper

110

Requirements for Electrical Installations.

110.5

Conductors.

Conductors normally used to carry current shall be of copper unless otgherwise provided in this Code. Where the conductor material is not specified, the material and the sizes given in this Code shall apply to copper conductors. Where other materials are used, the size shall be changed accordingly.

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4
Q

Conductor sizes are expressed in American Wire Gauge (AWG) or ____.

A

Circular Mils.

110

Requirement for Electrical Installations.

110.6

Conductor Sizes

Conductor sizes are expressed in American Wire Gauge (AWG) or in circular mils.

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5
Q

Wiring shall be installed so that the completed system will be free from ____, other than as required or permitted elsewhere in the Code.

A

Short Circuits, Ground Faults, and connections to the earth.

110

Requirement for Electrical Installations

110.7
Wiring Integrity

Completed wiring installations shall be free from short circuit, ground fault, or any connections to ground other than as required or permitted elsewhere in this Code.

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6
Q

Only wiring methods recognized as ___ are included in this Code.

A

Suitable

Suitable

110

Requirements for Electrical Installations

110.8

Wiring Methods

Only wiring methods recognized as suitable are included in this Code. The recognized methods of wiring shall be permitted to be installed in any type of building or occupancey, except as otherwise provided in this Code.

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7
Q

Equipment intended to interrupt current at fault levels shall have an interrupting rating sufficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment.

True or False

A

True

110
Requirement for Electrical Installations.

110.9

Interrupting Rating

Equipment intended to interrupt current at fault levels shall have an interrupting rating sufficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment.

Equipment intended to interrupt current at other than fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current that must be interrupted.

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8
Q

The ___ of a circuit shall be selected and coordinated to permit the circuit protective devices to clear a fault without extensive damgae to the electrical components of the circuit.

A

Overcurrent protective devices, total circuit impedance, component short circuit current ratings.

110

Installation Requirements for Electrical Installations

110.10

Circuit Impedance and Other Characteristics

The overcurrent protective devices, the total impedance, the component short circuit current ratings, and other characteristics of the circuit to be protected shall be selected and coordinated to permit the circuit protective devices used to clear a fault to do so without extensive damage to the electrical components of the circuit.

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9
Q

Unless identified for use the operating enviroment, no conductors or equipment shall be ____ having a deteriorating effect on the conductors or equipment.

A

Located in damp or wet locations, exposed to fumes, vapors, or gases, exposed to excessive temperatures.

110

Requirements for Electrical Installations

110.11

Deteriorating Agents

Unless identified for use in the operating environment, no conductors or equipment shall be located in damp or wet locations; where exposed to gases, fumes, vapors, liquids, or other agents that have a deteriorating effect on the conductors or equipment: or where exposed to excessive temperatures.

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10
Q

Some cleaning and lubricating compounds can cause sever deterioration of many ____ materials used for insulating and structrual applications in equipment.

True or False

A

True

110

Requirements for Electrical Installations.

110.11 Deteriorating Agents.

FPN No. 2 : Some cleaning agents and lubricating compounds can cause severe deterioration of many plastic materials used for insulating and structural applications in equipment.

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11
Q

The NEC requires that electrical work be ____.

A

Installed neat and workmanlike manner

110

Requirements for Electrical Installations

110.12 Mechanical Execution of Work.

Electrical equipment shall be installed in a neat and workmanlike manner.

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12
Q

Accepted industry workmanship practices are described in ANSI/NECA 1-2006, Standard and Practices for Good Workmanship in Electrical Contracting, and other ANSI approved installation standards.

True or False

A

True

110

Requirement for Electrical Installations

110.12
Mechanical Execution of Work

FPN: Accepted industry practices are described in ANSI/NECA 1-2006, Standard for Practices for Good Workmanship in Electrical Contracting, and other ANSI- approved installation standards

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13
Q

Unused opening other than those intended for the operation of equipment, intended for mounting purposes, or permitted as part of the design for listed equipment shall be _____.

A

Effectively closed to afford protection substantially equivalent to the wall of the equipment.

110

Requirements for Electrical Installations

  1. 12(A)
  2. 12

Mechanical Execution of work

(A) Unused Opening.

Unused opening, other than those intended fo the operation of equipment, those intended for mounting purposes, or those permitted as part of the design for listed equipment, shall be closed to afford protection substantially equibalent to the wall of the equipment.

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14
Q

Internal parts of electrical equipment, including ____, shall not be damaged or contaminated by foreign materials such as paint, plaster, cleaners, abrasives, or corrosive residues.

A

Bus bars, wiring terminals, insulators, and other surfaces.

110

Requirement for Electrical Installations

  1. 12(B)
  2. 12

Mechanical Execution of Work

(B) Integrity of Electrical Equipment and Connections.

Internal parts of electrical equipment, including bus bars, wiring terminals, insulators, and other surfaces, shall not be damaged or contaminated by foreign materials suchs as paint, plaster, cleaners, abrasives, or corrosive residues. There shall be no damaged parts that may adversely affect safe operation or mechanical strength of the equipemtn such as parts that are broken; bent; cut; or deteriorated by corrosion, checmical action, or overheating.

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15
Q

Electrical equipment that depends on ___ for cooling of exposed surfaces shall be installed so that airflow over such surfaces is not prevented by waslls or by adjacent installed equipment.

A

Natural circulation of air and convection principles.

110
Requirements for Electrical Installations

  1. 13(B)
  2. 13 Mounting and Cooling of Equipment

(B) Cooling

Electrical equipment that depends on the natural circulation of air and convection principles for cooling of exposed urfaces shall be installed so that room airflow over such surfaces is not prevented by walls or by adjacent installed equipment.

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16
Q

Conductor terminal and splicing devices must be ____ for the conductor material and they must be properly installed and used

A

Identified

110

Requirements for Electrical Installations

110.14

Electrical Connections

Because of different characteristics of dissimilar metals, devices such as pressure terminal or pressure splicing connectors and soldering lugs shall be identified for the material of the conductor and shall b e poperly installed and used.

17
Q

Many terminations and equipment are marked with ____.

A

Tightening Torque

110

Requirements for Electrical Installations

110.14
Electrical Connections

FPN: Many terminations and equipment are marked with a tightening torque.

18
Q

Connection of conductors to terminal parts shall ensure a thoroughly good connection without damaging the conductors and shall be made by means of _____.

A

Solder Plugs, Pressure Connectors, Splices to flexible leads.

110

Requirement for Electrical Installations

  1. 14(A)
  2. 14 Electrical Connections

(A) Terminals

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

19
Q

The temperature rating associated with the ampacity of a ____ shall be so selected and coordinated so as not to exceed the lowest temperature rating of any connected termination, conductor, or device.

A

Conductor

110

Requirement for Electrical Installations

  1. 14(C)
  2. 14

Electrical Connections

(C) Temperature Limitations

The temperature rating associated with the ampacity of a conductor shall be selected and coordinated so as not to exceed the lowest temperature rating of any connected terminations, conductor, or device. Conductors with temperature ratings higher than specified for terminations shall be permitted to be used for ampacity adjustment, correction, or both.

20
Q

Conductor ampacity shall be determined using the ____ column of Table 310.16 for circuits rated 100 A or less or marked 14 AWG through 1 AWG conductors, unless the equipment terminals are listed for use with conductors that have higher temperature rating.

A

60 Degree Celcius Column

110

Requirement for Electrical Installations

  1. 14(C)(1)(a)
  2. 14

Electrical Connections

(C) Temperature Limitations

(1) Equipment Provisions
(a) Termination provisions of equipment for circuits rated 100 amperes or less, or marked for 14 AWG through 1 AWG conductors, shall be used only for one of the following;

  1. Conductors rated 60 C
  2. Conductors with higher temperature ratings, provided the ampacity of such conductors is determined based on the 60 C ampacity of the conductor size used.
  3. Conductors with higer temperature ratings if the equipment is listed and identified for use with such condutors.
  4. For motors marked with design letters B,C, or D, conductors having an insulation rating of 75 C or higher shall be permitted to be used, provided the ampacity of such conductors does not exceed 75 C ampacity
21
Q

For circuits rated 100 A or less, when the equipment terminals are listed for use with 75 C conductors, the _____ column of Table 310.16 shall be used to determine the ampacity of THHN conductors installed.

A

75 C

110

Requirement for Electrical Installations

  1. 14(C)(1)(a)
  2. 14

Electrical Connections

(C) Temperature Limitations

(1) Equipment Provisions
(a) Termination provisions of equipment for circuits rated 100 amperes or less, or marked for 14 AWG through 1 AWG conductors, shall be used only for one of the following;

Conductors rated 60 C

Conductors with higher temperature ratings, provided the ampacity of such conductors is determined based on the 60 C ampacity of the conductor size used.

Conductors with higer temperature ratings if the equipment is listed and identified for use with such condutors.

For motors marked with design letters B,C, or D, conductors having an insulation rating of 75 C or higher shall be permitted to be used, provided the ampacity of such conductors does not exceed 75 C ampacity

22
Q

Conductors shall have their ampacity determined using the ____ column of Table 310.16 for circuits rated over 100 A, or marked for conductors larger than 1 AWG, unless the equipment terminals are listed for use with higer temperature rated conductors.

A

75 C

110

Requirements for Electrical Installations

  1. 14(C)(1)(b)
  2. 14

Electrical Connections

(C) Temperature Limitations

(1) Equipment Provisions
(b) Termination provisions of equipment for circuits rated over 100 amperes, or marked for conductors larger than 1 AWG, shall be used only for one of the following:

  1. Conductors rated 75 C
  2. Conductors with higher temperature ratings, provided the ampacity of such conductors does not exceed the 75 C ampacity of the conductor size used, or up to their ampacity if the equipment is listed and identified fo use with such conductors.
23
Q

Seperatley installed pressure connectors shall be used with conductors at the ____ not exceeding the ampacity at the listed and identified temperature rating of the connector.

A

ampacities

110

Requirements for Electrical Installations

  1. 14(C)(2)
  2. 14

Electrical Connections

(C) Temperature Limitations

(2) Seperate Connector Provisions.

Separately installed pressure connectors shall be used with conductors at the ampacities not exceeding the ampacity at the listed and identified temperture rating of the connector.

24
Q

On a 4-wire, delta

A

NEC 2008 (7 decks)

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