Article 110
Working space shall not be used for ________. A) Storage B) Raceways C) Lighting D) Accessibility
A) Storage
A minimum depth of _________ working space to live parts operating at 277 volts-to-ground is required where there are exposed live parts on pone side and no live or grounded parts on the other side. A) 2 FT B) 3 FT C) 4 FT D) 6 FT
B) 3 FT
For circuits rated 100A or less, when the equipment are listed for use with 75 C conductors, the _______________ column of Table 310.16 shall be used to used to determine the ampacity of THHN conductors installed. A) 30 C B) 60 C C) 75 C D) 90 C
C) 75 C
The minimum headroom of working spaces about motor control centers is _______________ A) 3ft B) 5ft C) 6ft D) 6 1/2ft
D) 6 1/2ft
Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current that is available at the line terminals of the equipment. A) True B) False
True
When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably _____. A) Accessible B) Guarded C) Open D) Enclosed
B) Guarded
Conductors shall be _________ unless otherwise provided. A)Bare B)Circular mils C) Square inches D) AWG
B)Circular mils
The term rainproof is typically used in conjunction with enclosure type number A) 3 B) 3R C) 3RX D) C and B
D) C and B
The _______ of a circuit shall be selected and coordinated to permit the circuit protective device to clear a fault without extensive damage to the electrical component of the circuit. A) Overcorrect Protective devices B) Total circuit impedance C) Component short circuit current ratings D) All of these
All of these
In locations where electrical equipment is likely to exposed to_________, enclosures or guards shall be so arranged and such strength as to prevent such damage. A) Corrosion B) Physical Damage C) Magnetic feilds D) Weather
B) Physical Damage
Working space distances for enclosed live parts shall be measured from the______of equipment or apparatus, if the live parts are enclosed. A) Enclosure B) Opening C) A or B D) None of these
C) A or B
Sufficient access and _____________ shall be provided and maintained about all electrical equipment to permit ready and safe operation and maintenance of such equipment. A) Ventilation B) Cleanliness C) Circulation D) Working space
D) Working space
The NEC requires that electrical work be __________ A) Installed in a a neat and workmanlike manner B) installed under the supervision of a qualified person C) Completed before being inspected D) All of these
A) Installed in a a neat and workmanlike manner
Some cleaning and lubricating compounds can cause severe deterioration of many plastic materials used for insulating and structural applications in equipment. A) True B) False
A) True
The NEC requires tested series-rated installations of circuit breakers or fuses to be field- marked to indicate the current rating for which the system has to be installed A) True B) False
A) True
The minimum headroom for working spaces about services equipment, switchboards, panelboards, or motor control center shall 6 1/2ft, except for services equipment or panel boards in existing dwelling units that do not exceed 200A A) True B) False
A) True
Listed or labeled equipment shall be ? and used in accordance with any instructions included in the listing or labeling A)True B)False
A) true
Accepted industry workmanship practices are described in ANSI/NECA 1-2010, Standard Practice of Good Workmanship in Electrical Construction, and other ANSI-appoved installation standards. A) True B) False
A)True
In Judging equipment for approval, considerations such as the following shall be evaluated A) Mechanical strength B)wire-bending space C)arching effect. D)All the above:
All the above: Mechanical strength, wire-bending space, arching effect.
The required working space for access to live parts operating at 300 volts-to-ground, where there are exposed live parts on one side and grounded parts on the other side, is ______________ A) 3ft B) 3 1/2 ft C) 4 ft D) 4 1/2 ft
B) 3 1/2 ft
The minimum working space on a circuit that is 120 volts-to-ground, with exposed live parts on one side and no live grounded parts on the other side of the working space, is _______________ A) 1 FT B) 3 FT C) 4 FT D) 6 FT
B) 3 FT
The working space in front of the electric equipment shall not be less than ____________ wide, or the width of the apparatus, if the live parts are enclosed. A) 15 in B) 30 in C) 40 in D) 60 in
B) 30 in
The dedicated equipment space for electrical equipment that is required for panelboards is measured from the floor to a height of ___________ above the equipment, or the structural ceiling, whichever is lower A) 3 Ft B) 6 Ft C) 12 Ft D) 30Ft
B) 6 Ft
Equipment associated with the electrical installation can be located above or below other electrical equipment within their working space when the associated equipment does not extend more than ___________ from the front of the electrical equipment. A) 3 inch B) 6 inch C) 12 inch D) 30 inch
B) 6 inch
Conductor ampacity shall be determined using the____ column of table 310.15(B)(16) for circuits rated 100A or less or marked for 14 AWG through 1 AWG conductors, unless the equipment terminals are listed for use with conductors that have higher temperature ratings. A) 30 C B) 60 C C) 75 C D) 90 C
B) 60 C
Conductor sizes are expressed in American Wire Gage (AWG) or in ______. A) Inches B) Circular Mils C) Square inches D) AWG
B) Circular Mils
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 devices A) Terminal B) Conductor C) Device D) All the above
B) Conductor
The dedicated space above a panelboard extends to a dropped or a suspended ceiling, which is considered a structural ceilings. A) True B) False
B) False
Electrical equipment that depends on _________ for cooling of exposed surfaces shall be installed so that airflow over suchsurface is not prevented by walls or adjacent installed equipment A) Outdoor Air B) Natural circulation air and convention principle C) Artificial cooling and circulation D) Magnetic inductions
B) Natural circulation air and convention principle
Illumination shall be provided for all working spaces about service equipment, switchboards, switchgear, panel boards, and motor control centers_______. A) over 600v B) located indoor C) rated 1,200A or more D) using automatic means of control
B) located indoor
For equipment rated 1200 amperes or more and over 6 feet wide that contain over- current devices, and where the entrance to the working space has a personal door less than 25 feet from the working space, the door ____________ A) Shall open either in or out with simple pressure and shall not have any lock B) shall open in the direction of egress and be equipped with panic hardware or other devices so the so the door can open under simple pressure C) shall be equipped with a locking means D) Shall be equipped with an electronic opener
B) shall open in the direction of egress and be equipped with panic hardware or other devices so the so the door can open under simple pressure
The dimension of working space for access to live parts operating at 300V, nominal-to-ground, where there are exposed live parts on both sides of the workspace is __________ according to Table 110.26(A)(1) A) 3ft B) 3 1/2 ft C) 4 ft D) 4 1/2 ft
C) 4 ft
For equipment rated 1200A or more and over 6ft wide that contains over-current devices, switching devices, or control devices; there shall be one entrance to and egress from the required working space not less than 24 in. wide and ________ high at each end of the working space. A) 5ft 6 in B) 6 ft C) 6ft 6in D) Any of these
C) 6ft 6in
Conductors shall have their ampacity determined using the____column of table 310.15(B)(16) for circuits rated over 100A, or marked for conductors larger that 1 AWG, unless the equipment terminals are listed for use with higher temperature rated conductors. A) 30 C B) 60 C C) 75 C D) 90 C
C) 75 C
Many terminations and equipment are either marked with ________, or have that information included in the product's installation instructions. A) A etching tool B) A removing label C) A tightening torque D) the manufacturer's initial
C) A tightening torque
Conductor terminal and splicing devices must be_____ for the conductor material and they must be properly instilled and used. A) Listed B) Approved C) Identified D) Any of these
C) Identified
Only wiring methods recognized as____ are included i this Code. A) Expensive B) Efficient C) Suitable D) Cost effective
C) Suitable
Where required by the code, markings on all electrical equipment shall contain voltage, current, wattage or other ratings with durability to withstand ____________ A) The voltage encountered B) Painting and other finishes applied C) The environment involved. D) lack of planning by the installer
C) The environment involved.
Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged _________ A) That it can be locked out and tagged B) It is not readily accessible C) The purpose is evident D) That it operates at less than 300 volts-to-grounds.
C) The purpose is evident
Unless identified for use in the operating environment, no conductors or equipment shall be _____ having a deteriorating effect on the conductors or equipment. A) Located in damp or wet locations B) Exposed to fumes, vapors, or gases C) Exposed to excessive temperatures D) All of of these
D) All of of these
Internal parts electrical equipment, including, _________ shall not be damaged or contaminated by foreign materials such as paint, plaster, cleaners, abrasive, or corrosive residues. A) Busbar B) Wiring terminal C) Insulator D) All of these
D) All of these
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 circuit B)Ground Faults C) Connection the earth D) All of these
D) All of these
Separately 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) Voltage B) Temperature C) Listings D) Ampacity
D) Ampacity
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 Lugs B) Pressure connector C) Splices to flexible leads D) Any of these
D) Any of these
Electrical equipment such as a switchboards, panelboards, industrial controller, meter socket enclosure, and motor control centers in commercial and industrial occupancies that are industrial occupancies that likely to require __________ while energized shall be field marked to qualified persons of the danger associated with an arc flash A) Examination B) Adjustment C) Services or maintenance D) Any of these.
D) Any of these.
Unused openings other that those intended for the operation of equipment, intended for mounting purposes, or permitted as part of the design for listed equipment shall be_____. A) Filled with Cable Clamps or connectors only B) Taped over with electrical tape C) Repaired only by welding or brazing in a metal slug D) Effective closed to afford protection substantially equivalent to the wall of the equipment
D) Effective closed to afford protection substantially equivalent to the wall of the equipment
On a 4-wire, Delta-connected system where the midpoint of one phase winding is grounded, the conductor having the higher phase voltage ground shall be durably and permanently marked by an outer finish is _________ in color A) Black B) Red C) Blue D) Orange
D) Orange
