Mastering the Sequence of Equipment Connections & Disconnections

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Which type of receptacles are required for both damp and wet locations?

WR receptacles (correct)

Receptacles with additional corrosion protection

Receptacles with UV resistance

Non-WR receptacles

Which type of plug ejector mechanisms are designed for use by persons with mobility or visual impairment?

WR receptacles

Flanged surface inlet

Receptacles with additional corrosion protection

Attachment plug ejector mechanisms (correct)

What is the purpose of a flanged surface inlet?

To prevent the engagement of the blades of the attachment plug with the contacts of the receptacle (correct)

To reduce the likelihood of damage to the cord

To accept attachment plugs with different voltage or current ratings

To energize the prongs, blades, or pins

Which of the following is required for a switchboard, switchgear, or panelboard to be used as service equipment?

A main bonding jumper Signup and view all the answers

What is the purpose of the main bonding jumper in a switchboard, switchgear, or panelboard used as service equipment?

To connect the grounded service conductor to the frame Signup and view all the answers

How should all sections of a switchboard or switchgear be bonded together?

Using an equipment-bonding jumper Signup and view all the answers

Which of the following is true about receptacles rated 15 and 20 amperes, 125 and 250 volts?

They are exempt from Section 406.9(B)(2) Signup and view all the answers

Which type of equipment is an example of cord-and-plug-connected equipment likely to be used outdoors or in a wet location for long periods of time?

Portable pump motor Signup and view all the answers

Where are receptacles prohibited to be installed inside a bathroom?

Inside the tub or shower Signup and view all the answers

What is the purpose of prohibiting the installation of receptacles inside bathtub or shower spaces?

To minimize the use of electrical devices in those areas Signup and view all the answers

What color should be used to mark the conductor entrance hole if the terminal for the equipment grounding conductor is not visible?

Green Signup and view all the answers

Which type of attachment plugs and cord connectors should be designed to ensure that the equipment grounding connection is made before the current-carrying connections?

Grounding-type Signup and view all the answers

What is the purpose of the longer grounding blade on grounding-type attachment plug caps?

To make the grounding connection last Signup and view all the answers

In which locations should tamper-resistant receptacles be installed according to the text?

All dwelling units and boathouses Signup and view all the answers

Which of the following is true about the sequence of connections and disconnections for equipment employing single-pole separable connectors?

Connections and disconnections are performed in the same sequence Signup and view all the answers

Which of the following is not covered by Article 408 of the NEC?

Equipment operating at over 1000 volts Signup and view all the answers

What is the term used for both metal-clad and metal-enclosed power switchgear in the 2014 NEC?

Switchgear Signup and view all the answers

Which of the following equipment can be reconditioned within the scope of Article 408?

Switchboards and switchgear Signup and view all the answers

Which type of receptacles installed in a wet location must have an enclosure that is weatherproof regardless of whether the plug is inserted?

15- and 20-ampere, 125- and 250-volt receptacles Signup and view all the answers

What type of receptacles shall be considered suitable for damp locations?

Receptacles suitable for wet locations Signup and view all the answers

What is the minimum degree that hinged covers of outlet box hoods must be able to open after installation?

90 degrees Signup and view all the answers

What type of receptacles shall be a listed weather-resistant type?

All 125- and 250-volt nonlocking receptacles Signup and view all the answers

Where are tamper-resistant receptacles required?

In all types of environments including pediatric care locations, child care facilities, and residential environments Signup and view all the answers

What is the purpose of tamper-resistant receptacles?

To prevent children from inserting foreign objects into receptacles Signup and view all the answers

Which type of receptacles are exempted from the tamper-resistant requirements?

All of the above Signup and view all the answers

What are the conditions for the use of single-pole separable connectors?

All of the above Signup and view all the answers

Which phase should be designated as the 'B phase' in a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system?

B phase Signup and view all the answers

What color should be used to mark the high-leg conductor in a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system?

Orange Signup and view all the answers

What is the purpose of marking the high-leg conductor in a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system?

To indicate the phase with the higher voltage to ground Signup and view all the answers

Which of the following is a requirement for circuit directories in switchboards, switchgear, and panelboards?

Located on the face of, inside of, or in an approved location adjacent to the panel door Signup and view all the answers

What is the acceptable way to identify circuits used for the same purpose?

Identify them by their location Signup and view all the answers

What is the purpose of marking spare devices in circuit directories?

To indicate that they are spares Signup and view all the answers

What is the purpose of marking switchboards, switchgear, and panelboards with the identification and physical location of where the power originates?

To promote more efficient lockout/tagout processes Signup and view all the answers

Which of the following is required to be calculated and marked on service equipment in other than dwelling units?

Available fault current Signup and view all the answers

What must be determined to ensure that the Short-circuit current rating (SCCR) is adequate for equipment not installed as service equipment?

Available fault current Signup and view all the answers

What is the purpose of marking available fault current and when it was determined for equipment installation modifications or expansions?

To ensure compliance with 408.6 Signup and view all the answers

What is the requirement for closing unused openings for circuit breakers and switches in all electrical enclosures, including panelboard cabinets, switchgear, and switchboard enclosures?

Identified closures or other approved means Signup and view all the answers

Which of the following is true about the grounding of panelboards according to the text?

Panelboard cabinets and panelboard frames, if of metal, shall be in physical contact with each other and shall be connected to an equipment grounding conductor. Signup and view all the answers

Where should a terminal bar for equipment grounding conductors be secured in a panelboard according to the text?

Inside the cabinet Signup and view all the answers

What should the terminal bar be bonded to if the panelboard frame is made of metal according to the text?

The cabinet and panelboard frame Signup and view all the answers

Which of the following is true about overcurrent protection for a panelboard?

Individual protection is not required if the panelboard is protected by two main circuit breakers or two sets of fuses with a combined rating not greater than that of the panelboard. Signup and view all the answers

Where should the overcurrent protection required for a panelboard supplied through a transformer be located?

On the secondary side of the transformer. Signup and view all the answers

What is the maximum number of overcurrent devices allowed in a panelboard constructed or wired under Exception No. 1?

42 Signup and view all the answers

What is the maximum rating of overcurrent protection allowed for panelboards equipped with snap switches rated at 30 amperes or less?

200 amperes Signup and view all the answers

Which of the following is the correct statement regarding the marking of a switchboard, switchgear, or panelboard that contains a 3-phase, 4-wire center-tap grounded delta system?

The marking is required to warn qualified individuals of the presence of a high leg (208 volts to ground) in the equipment. Signup and view all the answers

What is the purpose of marking a switchboard, switchgear, or panelboard containing an ungrounded ac electrical system?

To differentiate between grounded and ungrounded electrical systems. Signup and view all the answers

What is the purpose of field marking a switchboard, switchgear, or panelboard that contains a high-impedance grounded neutral ac system?

To indicate the voltage between conductors and to warn individuals about the voltage to ground under fault conditions. Signup and view all the answers

What is the purpose of field marking a switchboard, switchgear, or panelboard containing an ungrounded dc electrical system?

To indicate the voltage between conductors. Signup and view all the answers

Which of the following is true about the location requirements for switchboards and switchgear with exposed live parts?

They must be located in permanently dry locations and accessible only to qualified persons. Signup and view all the answers

What is the marking required for a panelboard that is suitable for use as service equipment?

It must be marked 'Use Copper or Aluminum Wire' Signup and view all the answers

Which of the following is true about the ampacity ratings for wire sizes used in a panelboard?

Wire sizes 14 AWG through 1 AWG have a 60°C ampacity rating, while wire sizes 1/0 AWG and larger have a 75°C ampacity rating. Signup and view all the answers

What is the maximum number of overcurrent devices allowed in a panelboard?

42 Signup and view all the answers

According to the text, where should the insulated equipment grounding conductor that is run with the circuit conductors be permitted to pass through the panelboard without being connected to the panelboard's equipment grounding terminal bar?

The neutral terminal bar Signup and view all the answers

According to the text, where should a separate equipment grounding conductor (EGC) terminal bar be installed and bonded to the panelboard for the termination of feeder and branch-circuit EGCs?

A separate terminal bar Signup and view all the answers

According to the text, what is the reason for not allowing any other connection between the equipment grounding terminal bar and the neutral bar (other than that allowed in 250.30, 250.32, and 250.142)?

To avoid parallel paths for current Signup and view all the answers

According to the text, what is the purpose of an isolated equipment grounding terminal?

To reduce electrical noise on the grounding circuit Signup and view all the answers

According to the text, what must an isolated equipment grounding conductor be grounded by?

An insulated EGC that is run with the circuit conductors Signup and view all the answers

According to the text, where should an isolated equipment grounding conductor terminate in the system?

At a point in the system where the noise is mitigated Signup and view all the answers

According to the text, what is the purpose of an isolated grounding electrode?

To provide a safe path for ground-fault current Signup and view all the answers

Which of the following is true about the installation of retrofit kits in luminaires?

Retrofit kits should not be installed in metal luminaire canopies or in open bases of portable table or floor luminaires. Signup and view all the answers

What is the requirement for the listing of luminaires, lampholders, and retrofit kits?

Luminaires, lampholders, and retrofit kits must be listed to ensure no live parts are exposed. Signup and view all the answers

What is the purpose of the inspection of luminaires?

To ensure the connections between the luminaire conductors and the circuit conductors can be inspected without requiring the disconnection of any part of the wiring. Signup and view all the answers

Which of the following is a requirement for an industrial control panel to be used as service equipment?

It must have a main bonding jumper for connecting the grounded conductor Signup and view all the answers

What is the purpose of marking an industrial control panel as suitable for use as service equipment?

To identify the panel as being suitable for use as service equipment Signup and view all the answers

What is the purpose of the short-circuit current rating marking on an industrial control panel?

To indicate the panel's short-circuit current rating based on a listed and labeled assembly or an approved method Signup and view all the answers

What is the purpose of the main bonding jumper in an industrial control panel used as service equipment?

To connect the grounded conductor to the industrial control panel equipment ground bus or equipment ground terminal Signup and view all the answers

Which of the following is true about the short-circuit current rating (SCCR) for an industrial control panel?

The SCCR should not exceed the available fault current at the panel. Signup and view all the answers

Which of the following is true about the bonding of industrial control panels?

Multisection industrial control panels shall be bonded together using an equipment bonding jumper. Signup and view all the answers

Which of the following is true about the phase arrangement on 3-phase horizontal common power and vertical buses in an industrial control panel?

The phase arrangement should be A, B, C from front to back. Signup and view all the answers

Which of the following is true about the wiring space within industrial control panel enclosures?

Industrial control panel enclosures shall not be used as junction boxes or raceways for conductors feeding through or tapping off to other equipment. Signup and view all the answers

Which of the following is true about the minimum spacing between uninsulated metal parts and live parts in switchboards, switchgear, and panelboards?

The distance shall be less than that specified in Table 408.56 Signup and view all the answers

What is the purpose of marking panelboards by the manufacturer?

To indicate the voltage and current rating, number of phases or dc buses, and manufacturer's name or trademark Signup and view all the answers

What is the minimum size of the industrial control panel supply conductor?

125 percent of the full-load current rating of all heating loads plus 125 percent of the full-load current rating of the highest rated motor Signup and view all the answers

What is the rating or setting of the overcurrent protective device for the circuit supplying the industrial control panel?

Not greater than the sum of the largest rating or setting of the branch-circuit short-circuit and ground-fault protective device provided with the industrial control panel, plus 125 percent of the full-load current rating of all resistance heating loads, plus the sum of the full-load currents of all other motors and apparatus Signup and view all the answers

Which of the following is true about the wire-bending space for a panelboard rated 225 amperes or less and designed to contain not over 42 overcurrent devices?

Either the top or bottom wire-bending space shall be sized in accordance with Table 312.6(A) for a panelboard rated 225 amperes or less and designed to contain not over 42 overcurrent devices. Signup and view all the answers

Which of the following is true about the wire-bending space for a panelboard rated above 225 amperes or designed to contain more than 42 overcurrent devices?

The top and bottom wire-bending space shall be sized in accordance with Table 312.6(B)(2) for the largest conductor entering or leaving the enclosure. Signup and view all the answers

Which of the following is true about the wire-bending space for a panelboard where at least one side wire-bending space is sized in accordance with Table 312.6(B)(2) for the largest conductor to be terminated in any side wire-bending space?

Either the top or bottom wire-bending space for any panelboard shall be permitted to be sized in accordance with Table 312.6(A) where at least one side wire-bending space is sized in accordance with Table 312.6(B)(2) for the largest conductor to be terminated in any side wire-bending space. Signup and view all the answers

Which of the following is true about the wire-bending space for a panelboard designed and constructed for wiring using only a single 90-degree bend for each conductor?

The top and bottom wire-bending space shall be permitted to be sized in accordance with Table 312.6(A) spacings if the panelboard is designed and constructed for wiring using only a single 90-degree bend for each conductor. Signup and view all the answers

Which of the following is true about the marking requirements for luminaires installed in wet or damp locations?

Luminaires installed in wet locations shall be marked as suitable for wet locations. Signup and view all the answers

Which of the following is an example of a wet location?

Roofed open porches and carports Signup and view all the answers

Which of the following is true about the location requirements for luminaires in locations protected from the weather but still exposed to moisture?

Luminaires must be marked as suitable for damp locations. Signup and view all the answers

According to the text, what is the purpose of separating the power wiring from communications, signaling, and power-limited circuits in a luminaire pole?

To prevent interference between the different circuits Signup and view all the answers

Which type of wiring may be installed within the pole cavity if kept separated from the power wiring in a light pole that supports a luminaire and a security camera?

Security camera signaling and power-limited wiring Signup and view all the answers

What is one of the options for fulfilling the separation requirement between the power wiring and camera conductors within a luminaire pole?

Enclosing the camera conductors within a flexible raceway Signup and view all the answers

What is the maximum height allowed for a metal light pole that does not have a handhole and uses a hinged-base pole to permit access to splices made in the pole base?

20 feet Signup and view all the answers

According to the text, what is the minimum clearance between surface-mounted incandescent or LED luminaires with a completely enclosed light source and the nearest point of a clothes closet storage space?

300 mm (12 in.) Signup and view all the answers

What is the purpose of the clearance measurement specified in 410.16(D) for luminaires installed in clothes closets?

To prevent hot lamps or parts of broken lamps from coming in contact with combustibles Signup and view all the answers

According to the text, what types of luminaires are permitted in a clothes closet?

All of the above Signup and view all the answers

What is the purpose of the storage space required for closets that permit access to both sides of the clothes-hanging rod?

To provide clearance for the clothes-hanging rod Signup and view all the answers

Which type of luminaires should be used in playing and spectator seating areas of indoor sports facilities?

Luminaires with a glass or plastic lens Signup and view all the answers

What is the minimum clearance required between the lowest surface of the roof decking and the top of a luminaire installed in exposed or concealed locations under the roof decking?

38 mm (11⁄2 in.) Signup and view all the answers

What temperature should luminaires be constructed, installed, or equipped with shades or guards to prevent combustible material from being subjected to?

90°C (194°F) Signup and view all the answers

Where should lampholders be located if installed over highly combustible material?

At least 2.5 m (8 ft) above the floor Signup and view all the answers

Which of the following is true about the grounding requirements for luminaires and lighting equipment?

Exposed conductive surfaces that comply with certain conditions do not need to be connected to an equipment grounding conductor. Signup and view all the answers

According to the text, which of the following is a condition under which exposed conductive surfaces on luminaires do not need to be connected to an equipment grounding conductor?

All of the above. Signup and view all the answers

According to the text, which of the following is a requirement for the connection to the equipment grounding conductor for luminaires and equipment?

All luminaires and equipment must be connected to an equipment grounding conductor. Signup and view all the answers

Which of the following is true about the installation of recessed luminaires designed for feed-through branch-circuit conductors?

The total surface area covered by the luminaire canopy must be less than 180 square inches Signup and view all the answers

Which of the following is true about the connection of electric-discharge and LED luminaires?

They must be connected to the branch circuit through flexible cord Signup and view all the answers

What is the requirement for the supports of luminaires and lampholders?

They must be securely supported Signup and view all the answers

What are the conditions for the use of metal or nonmetallic poles to support luminaires?

The pole must have a handhole not less than 50 mm × 100 mm (2 in. × 4 in.) Signup and view all the answers

Which of the following conditions must be met for luminaires to be installed in commercial cooking hoods?

The luminaire must be identified for use within commercial cooking hoods and installed such that the temperature limits of the materials used are not exceeded. Signup and view all the answers

What type of luminaires are not permitted in commercial cooking hoods?

Conventional enclosed and gasketed-type luminaires located in the path of travel of exhaust products. Signup and view all the answers

What are the requirements for luminaires installed in bathtub or shower areas?

No parts of cord-connected luminaires, chain-, cable-, or cord-suspended luminaires, lighting track, pendants, or ceiling-suspended (paddle) fans with luminaire (light kit) shall be located within a zone measured 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of the bathtub rim or shower stall threshold. Signup and view all the answers

What is the requirement for luminaires subject to shower spray in bathtub or shower areas?

They must be listed for a wet location. Signup and view all the answers

Mastering the Sequence of Equipment Connections &amp; Disconnections

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Questions and Answers

Which type of receptacles are required for both damp and wet locations?

Which type of plug ejector mechanisms are designed for use by persons with mobility or visual impairment?

What is the purpose of a flanged surface inlet?

Which of the following is required for a switchboard, switchgear, or panelboard to be used as service equipment?

What is the purpose of the main bonding jumper in a switchboard, switchgear, or panelboard used as service equipment?

How should all sections of a switchboard or switchgear be bonded together?

Which of the following is true about receptacles rated 15 and 20 amperes, 125 and 250 volts?

Which type of equipment is an example of cord-and-plug-connected equipment likely to be used outdoors or in a wet location for long periods of time?

Where are receptacles prohibited to be installed inside a bathroom?

What is the purpose of prohibiting the installation of receptacles inside bathtub or shower spaces?

What color should be used to mark the conductor entrance hole if the terminal for the equipment grounding conductor is not visible?

Which type of attachment plugs and cord connectors should be designed to ensure that the equipment grounding connection is made before the current-carrying connections?

What is the purpose of the longer grounding blade on grounding-type attachment plug caps?

In which locations should tamper-resistant receptacles be installed according to the text?

Which of the following is true about the sequence of connections and disconnections for equipment employing single-pole separable connectors?

Which of the following is not covered by Article 408 of the NEC?

What is the term used for both metal-clad and metal-enclosed power switchgear in the 2014 NEC?

Which of the following equipment can be reconditioned within the scope of Article 408?

Which type of receptacles installed in a wet location must have an enclosure that is weatherproof regardless of whether the plug is inserted?

What type of receptacles shall be considered suitable for damp locations?

What is the minimum degree that hinged covers of outlet box hoods must be able to open after installation?

What type of receptacles shall be a listed weather-resistant type?

Where are tamper-resistant receptacles required?

What is the purpose of tamper-resistant receptacles?

Which type of receptacles are exempted from the tamper-resistant requirements?

What are the conditions for the use of single-pole separable connectors?

Which phase should be designated as the 'B phase' in a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system?

What color should be used to mark the high-leg conductor in a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system?

What is the purpose of marking the high-leg conductor in a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system?

Which of the following is a requirement for circuit directories in switchboards, switchgear, and panelboards?

What is the acceptable way to identify circuits used for the same purpose?

What is the purpose of marking spare devices in circuit directories?

What is the purpose of marking switchboards, switchgear, and panelboards with the identification and physical location of where the power originates?

Which of the following is required to be calculated and marked on service equipment in other than dwelling units?

What must be determined to ensure that the Short-circuit current rating (SCCR) is adequate for equipment not installed as service equipment?

What is the purpose of marking available fault current and when it was determined for equipment installation modifications or expansions?

What is the requirement for closing unused openings for circuit breakers and switches in all electrical enclosures, including panelboard cabinets, switchgear, and switchboard enclosures?

Which of the following is true about the grounding of panelboards according to the text?

Where should a terminal bar for equipment grounding conductors be secured in a panelboard according to the text?

What should the terminal bar be bonded to if the panelboard frame is made of metal according to the text?

Which of the following is true about overcurrent protection for a panelboard?

Where should the overcurrent protection required for a panelboard supplied through a transformer be located?

What is the maximum number of overcurrent devices allowed in a panelboard constructed or wired under Exception No. 1?

What is the maximum rating of overcurrent protection allowed for panelboards equipped with snap switches rated at 30 amperes or less?

Which of the following is the correct statement regarding the marking of a switchboard, switchgear, or panelboard that contains a 3-phase, 4-wire center-tap grounded delta system?

What is the purpose of marking a switchboard, switchgear, or panelboard containing an ungrounded ac electrical system?

What is the purpose of field marking a switchboard, switchgear, or panelboard that contains a high-impedance grounded neutral ac system?

What is the purpose of field marking a switchboard, switchgear, or panelboard containing an ungrounded dc electrical system?

Which of the following is true about the location requirements for switchboards and switchgear with exposed live parts?

What is the marking required for a panelboard that is suitable for use as service equipment?

Which of the following is true about the ampacity ratings for wire sizes used in a panelboard?

What is the maximum number of overcurrent devices allowed in a panelboard?

According to the text, where should the insulated equipment grounding conductor that is run with the circuit conductors be permitted to pass through the panelboard without being connected to the panelboard's equipment grounding terminal bar?

According to the text, where should a separate equipment grounding conductor (EGC) terminal bar be installed and bonded to the panelboard for the termination of feeder and branch-circuit EGCs?

According to the text, what is the reason for not allowing any other connection between the equipment grounding terminal bar and the neutral bar (other than that allowed in 250.30, 250.32, and 250.142)?

According to the text, what is the purpose of an isolated equipment grounding terminal?

According to the text, what must an isolated equipment grounding conductor be grounded by?

According to the text, where should an isolated equipment grounding conductor terminate in the system?

According to the text, what is the purpose of an isolated grounding electrode?

Which of the following is true about the installation of retrofit kits in luminaires?

What is the requirement for the listing of luminaires, lampholders, and retrofit kits?

What is the purpose of the inspection of luminaires?

Which of the following is a requirement for an industrial control panel to be used as service equipment?

What is the purpose of marking an industrial control panel as suitable for use as service equipment?

What is the purpose of the short-circuit current rating marking on an industrial control panel?

What is the purpose of the main bonding jumper in an industrial control panel used as service equipment?

Which of the following is true about the short-circuit current rating (SCCR) for an industrial control panel?

Which of the following is true about the bonding of industrial control panels?

Which of the following is true about the phase arrangement on 3-phase horizontal common power and vertical buses in an industrial control panel?

Which of the following is true about the wiring space within industrial control panel enclosures?

Which of the following is true about the minimum spacing between uninsulated metal parts and live parts in switchboards, switchgear, and panelboards?

What is the purpose of marking panelboards by the manufacturer?

What is the minimum size of the industrial control panel supply conductor?

What is the rating or setting of the overcurrent protective device for the circuit supplying the industrial control panel?

Which of the following is true about the wire-bending space for a panelboard rated 225 amperes or less and designed to contain not over 42 overcurrent devices?

Which of the following is true about the wire-bending space for a panelboard rated above 225 amperes or designed to contain more than 42 overcurrent devices?

Which of the following is true about the wire-bending space for a panelboard where at least one side wire-bending space is sized in accordance with Table 312.6(B)(2) for the largest conductor to be terminated in any side wire-bending space?

Mastering the Sequence of Equipment Connections & Disconnections