123 Questions
Which article covers general requirements, applications, and construction specifications for flexible cords and flexible cables?
Article 400
Under what conditions are flexible cords and cables permitted to be used for branch circuits and feeders?
555.34(A)(2)
What is the requirement for flexible cords and flexible cables to comply with other articles of the Code?
400.2
Which type of cords do the currents under Column B apply to?
Two-conductor cords
What is the ampacity for elevator cables only?
57 amperes
What is the temperature rating of Cable D1 with a copper conductor size of 12 AWG?
60°C (140°F)
Which type of cord is suitable for pendant or portable use in damp locations?
SJTOOW9
Which type of cord is suitable for pendant or portable use in extra-hard usage?
SJE
Which type of cord is suitable for refrigerators, room air conditioners, and as permitted in 422.16(B)?
SP-3
Which type of cord is suitable for ranges and dryers in damp locations?
SRD
Which type of cable is suitable for damp and wet locations?
Thermoset and Thermoplastic
What is the maximum voltage rating for portable power cables?
600 volts
Which type of cable is oil-resistant?
Oil-resistant thermoset
What is the insulation thickness for Types EV, EVJ, EVEJE, EVT, and EVJT cables of nylon construction?
1.14 mm (45 mil)
Which type of cable is suitable for elevator lighting and control in unclassified locations?
Elevator cable EO
What is the voltage rating for electric vehicle cable EV?
1000
What is the insulation thickness for portable power cable G with AWG 2 conductors?
2.03 mm
What is the insulation type for heater cord HPD?
Thermoset
Which of the following types of cords is suitable for use in wet locations and is sunlight resistant?
Type STOW
Which of the following types of cords is rated for 2000 volts?
Type PPE
Which of the following tables provides the ampacities for flexible cords and flexible cables with not more than three current-carrying conductors?
Table 400.5(A)(2)
Which of the following types of cords is permitted to be designated as weather and water resistant with the suffix 'W' after the Code type designation?
Type STOO
According to Table 400.5(A)(3), what is the adjustment factor for a flexible cord or flexible cable with 7-9 current-carrying conductors?
70%
In a 3-wire circuit of a 4-wire, 3-phase, wye-connected system, which conductor carries approximately the same current as the line-to-neutral currents of the other conductors?
Neutral conductor
On a 4-wire, 3-phase, wye circuit with more than 50% of the load consisting of nonlinear loads, what is the status of the neutral conductor?
Considered a current-carrying conductor
Which type of cord is suitable for ranges and dryers in damp locations?
Type SE
What is the insulation thickness for portable power cable G with AWG 2 conductors?
250 mils
Which type of cord is suitable for pendant or portable use in damp locations?
Type SJ
Which type of cable is suitable for damp and wet locations?
Type SEO
Which table in the code provides the ampacities for flexible cords and flexible cables with not more than three current-carrying conductors?
Table 400.5(A)(2)
What is the relevant product certification standard for flexible cords and cables?
UL 62
What is the maximum temperature rating for flexible cords and flexible cables?
Not specified in the text
What is the low-temperature rating for flexible cords and cables?
-40°C
Which conductor is required to be connected to the screw shell of a lampholder and the larger blade of a polarized two-wire attachment cap?
Grounded conductor
What color(s) should a conductor intended to be used as an equipment grounding conductor have?
Continuous green color with one or more yellow stripes
What size should the conductors be in portable cables used to connect mobile equipment and machinery?
12 AWG or larger
What should all shields in portable cables be connected to?
Equipment grounding conductor
Which one of the following methods is NOT used to identify grounded conductors in flexible cords and flexible cables?
Tinned Conductors
Which one of the following is a method of identifying the grounded conductor in a cord where the conductor insulation is part of the molded jacket and is not separable?
White Stripe
Which one of the following is NOT a method of identifying grounded conductors in cords with insulation on the individual conductors integral with the jacket?
Colored Separator
Which one of the following is a method of identifying grounded conductors in cords with no braids on the individual conductors?
Colored Insulation
According to Table 400.44(B)(1), what is the nominal insulation thickness of power conductors for a size 1/0 copper conductor in a three-conductor Type G portable power feeder cable rated 2000 Volts to 5000 Volts?
110 mils
According to Table 400.44(B)(1), what is the nominal insulation thickness of power conductors for a size 3 copper conductor in a three-conductor Type G portable power feeder cable rated 2000 Volts to 5000 Volts?
3 AWG
According to Table 400.44(B)(2), what is the nominal insulation thickness of power conductors for a size 2001 to 5000 copper conductor in a single conductor Type SH portable power feeder cable rated 2000 Volts to 25,000 Volts for 100 Percent Insulation Level?
2001 to 5000 vol.
According to 400.10(A)(11), when can a flexible cord or flexible cable be used between an existing receptacle outlet and an inlet that provides power to a flat screen TV or similar equipment?
When the listed assembly is energized only when the rubber cord is plugged into an existing receptacle outlet
Which of the following is NOT a permitted use for flexible cords, flexible cables, cord sets, and power supply cords according to 400.12?
When run through holes in walls, floors, or ceilings
According to the text, when are flexible cords and flexible power supply cables permitted to be used as a substitute for the fixed wiring of a structure?
When the cords and cables are used in conjunction with listed utilization equipment
According to the text, what must be observed when using listed cord-and-plug-connected equipment in relation to the prohibited uses of flexible cords and flexible cables?
The equipment must be installed in accordance with 400.12(4) and (5)
Which type of cord is suitable for use in wet locations and is sunlight resistant?
KFF-1
What is the maximum temperature rating for flexible cords and flexible cables?
250°C
What is the insulation type for heater cord HPD?
Heat-resistant rubber
Which type of cable is suitable for elevator lighting and control in unclassified locations?
PGF
Which type of wire is permitted to be marked for limited smoke after the Code type designation?
Modified ethylene tetrafluoroethylene (ETFE)
What is the ampacity of a 16 AWG fixture wire?
8
What is the minimum size for fixture wires?
18 AWG
What is the maximum number of fixture wires permitted in a single conduit or tubing?
40%
According to Section 404.2(C), in which of the following situations is a grounded conductor not required in a switch box?
When the switch box is located in a bathroom
According to Section 404.3(A), what type of switches and circuit breakers are required?
Externally operable type
According to Section 404.3(A), what are the minimum wire-bending space and minimum gutter space requirements for switch enclosures?
As required by the National Electrical Code
According to Table 400.51(A)(1), what is the ampacity for a single conductor copper cable with AWG 3 size for 15,001-25,000 volts shielded?
188
According to Table 400.51(A)(1), what is the ampacity for a three conductor copper cable with AWG 4 size for 2001-8000 volts shielded?
134
According to Table 402.3, what is the maximum operating temperature for heat-resistant rubber-covered fixture wire with type letter FFHH-2?
150°C
According to Table 402.3, what is the insulation thickness for tape insulated fixture wire with type letter KF-1 and AWG 18-10 size?
0.14 mm
Which article covers general requirements, applications, and construction specifications for switches, switching devices, and circuit breakers used as switches operating at 1000 volts and below?
Article 404
According to 402.14, what is the specified overcurrent protection for fixture wires?
As specified in 240.5
According to the text, where should the grounded circuit conductor be installed for switches controlling lighting loads supplied by a grounded general-purpose branch circuit?
At one location where multiple switch locations control the same lighting load
According to the text, what is the maximum number of electronic control switches allowed on a branch circuit?
5
According to Table 400.44(B)(3), what is the nominal insulation thickness of power conductors for a size 4/0 copper conductor in a three-conductor Type SHD-GC portable power feeder cable rated 2000 Volts to 25,000 Volts for 100 Percent Insulation Level?
150 mils
According to Table 400.44(B)(4), what is the nominal insulation thickness of power conductors for a size 1 copper conductor in a three-conductor Type SHD-CGC portable power feeder cable rated 2000 Volts to 5000 Volts for 100 Percent Insulation Level?
120 mils
According to the text, what should be the size of the equipment grounding conductor(s) in cables with three or more conductors?
At least the same size as the largest power conductor
According to Table 400.50, which type of portable power feeder cable should be used for voltages between 2000 and 5000 volts?
Type G
What is the minimum radius to which portable power feeder cables rated from 2000 volts to 5000 volts should not be bent?
6 times the overall cable outer diameter
What is the maximum voltage rating for portable power cables?
25,000 volts
According to Table 400.51(A)(1), where should the temperature correction factors be applied for portable power feeder cables?
Ampacity in Table 400.51(A)(2)
Which type of knife switch does not have to be equipped with a locking device, but must ensure that the blades remain disengaged regardless of their orientation when the switch is in the open position?
Single-throw knife switch
What is the requirement for the throw of double-throw knife switches?
Vertical or horizontal
What type of switches shall have barriers to prevent inadvertent contact with energized blades?
Bolted pressure contact switches
Which types of switches shall be connected so that the terminals supplying the load are de-energized when the switch is in the open position?
Single-throw knife switches and switches with butt contacts
Which of the following is NOT a requirement for switches and circuit breakers installed in accordance with 110.27(A)(1), (A)(2), (A)(3), or (A)(4)?
They shall be permitted without barriers when mounted in cabinets or boxes
Which of the following is NOT a requirement for a surface-mounted switch or circuit breaker in damp or wet locations?
It shall be barriered to prevent operator exposure when making manual adjustments or switching
According to the text, when can time switches, flashers, and similar devices be mounted without barriers?
When they are accessible only to qualified persons
According to Section 404.20(A), what information must be marked on switches?
The maximum rating of the switch
According to Section 404.14(F), which of the following is NOT permitted to be controlled by general-use dimmer switches and electronic control switches?
Portable lighting
According to Section 404.16, which type of switches are NOT permitted to be reconditioned?
Lighting, dimmer, and electronic control switches
According to Section 404.22, under what conditions are reconditioned knife switches, switches with butt contacts, and bolted pressure contact switches permitted?
If they have been evaluated by a qualified testing laboratory
Which type of switch shall only be used on AC circuits and used for controlling resistive and inductive loads not exceeding the ampere rating of the switch at the voltage applied?
Alternating-Current General-Use Snap Switch
Which type of switch shall be permitted on either AC or DC circuits and used only for controlling resistive loads not exceeding the ampere rating of the switch at the voltage applied?
Alternating-Current or Direct-Current General-Use Snap Switch
Which type of snap switch shall be marked CO/ALR and directly connected to aluminum conductors rated 20 amperes or less?
CO/ALR Snap Switches
Which type of switch shall be permitted to be of the knife-switch type?
Motor-Circuit Switches
According to the text, what is the maximum height at which switches and circuit breakers installed adjacent to motors, appliances, or other equipment can be located?
2.0 m (6 ft 7 in.)
According to the text, what is the maximum voltage allowed between adjacent devices in a snap switch enclosure?
300 volts
According to the text, when are barriers required between switches that are ganged in a box?
When controlling 277-volt lighting on 480Y/277-volt systems
According to the text, what is the requirement for a multipole, general-use snap switch that is fed from more than a single circuit?
It must be listed and marked as a two-circuit or three-circuit switch
Which one of the following is NOT a requirement for mounting general-use snap switches, dimmers, and control switches on insulating material?
The extension plaster ears of flush-type switches must be seated against the surface
Which one of the following is a requirement for mounting flush-type general-use snap switches, dimmers, and control switches in boxes that are flush with the finished surface or project from it?
The mounting yoke or strap must be seated against the box
Which one of the following is a requirement for mounting flush-type general-use snap switches, dimmers, and control switches in boxes that are set back of the finished surface?
The extension plaster ears must be seated against the surface
Which one of the following is NOT a requirement for mounting general-use snap switches, dimmers, and control switches on insulating material?
The extension plaster ears of flush-type switches must be seated against the surface
Which of the following is NOT a requirement for receptacles according to the text?
Being suitable for use as lampholders
What is the minimum ampere rating for receptacles according to the text?
15 amperes
Which type of receptacle marking is required for receptacles controlled by an automatic control device?
Symbol shown in Figure 406.3(F) and the word 'controlled'
What is the maximum voltage rating for receptacles according to the text?
250 volts
Which of the following is a requirement for switch enclosures with doors that expose uninsulated live parts when opened?
The switch mechanisms must be constructed so that access to the switch interior is restricted when the switch is in the closed position
What is the maximum voltage rating for portable power cables?
5000 volts
Which of the following is NOT a requirement for mounting general-use snap switches, dimmers, and control switches on insulating material?
The insulating material must have a minimum thickness of 0.25 inches
Which of the following is NOT a prohibited use of an attachment plug according to Section 406.7?
Using an attachment plug to supply power to a building from a portable generator during a power failure
What does Section 406.7 prohibit in relation to the use of an attachment plug?
Energizing prongs or blades that are exposed to contact by persons
What type of device is pictured below that must not be energized until the cord connector is installed?
Flanged inlet device
Which of the following is NOT a requirement for receptacle faceplates (cover plates)?
They must be grounded
What is the minimum thickness requirement for metal faceplates?
0.76 mm (0.030 in.)
Which of the following is a requirement for faceplates of insulating material?
They must be noncombustible
Which of the following is a requirement for flush device cover plates with integral night light and/or USB charger?
They must be listed and constructed such that the night light and/or Class 2 circuitry is integral with the flush device cover plate
Which type of receptacles shall be installed on 15- and 20-ampere branch circuits, except as provided in 406.4(D)?
Grounding-type receptacles
When can non-grounding-type receptacles be replaced with grounding-type receptacles?
When supplied through a ground-fault circuit interrupter
What should be marked on the cover plates of grounding-type receptacles supplied through a ground-fault circuit interrupter?
'GFCI Protected' and 'No Equipment Ground'
What should be connected between the grounding-type receptacles supplied through a ground-fault circuit interrupter?
No equipment grounding conductor
According to the text, when should tamper-resistant receptacles be installed?
When replacements are made at receptacle outlets that are required to be tamper-resistant elsewhere in this Code
According to the text, what is the purpose of weather-resistant receptacles?
To protect receptacles from failures
According to the text, when should automatically controlled receptacles be replaced with equivalently controlled receptacles?
When automatic control is no longer required
According to the text, when should receptacles be provided with ground-fault protection of equipment (GFPE)?
When replacements are made at receptacle outlets that are required to be so protected elsewhere in this Code
Which one of the following is NOT a requirement for mounting flush-type general-use snap switches, dimmers, and control switches in boxes that are flush with the finished surface or project from it?
The switch should be a device assembly or box cover listed and identified for securing by a single screw.
Which one of the following is NOT a requirement for switches and circuit breakers installed in accordance with 110.27(A)(1), (A)(2), (A)(3), or (A)(4)?
The switches and circuit breakers should be mounted on nonmetallic material.
Which type of cord is suitable for ranges and dryers in damp locations?
Type SE cable
Which one of the following is NOT a permitted use for flexible cords, flexible cables, cord sets, and power supply cords according to 400.12?
Connection of stationary equipment
Test your knowledge on electrical cord types and their applications with this quiz. Identify the correct cord types for various locations and conditions, including damp, wet, and oil-resistant environments.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
