Test 6
According to the NEC, the branch-circuit conductors for fixed electric space-heating equipment and any associated motors shall be sized not smaller than _____ of the load? 1. 115% 2. 125 % 3. 156 % 4. 170%
2. 125 %
Using the NEC recommendations for branch circuit conductors that feed motor loads, what would be the largest motor that can be connected to a single-phase 120 V circuit, if the copper conductors are insulated with THWN and terminals are rated for 75 deg C? 1. 1 hp 2. 1 1/2 hp 3. 2 hp 4. 2 1/2 hp
1. 1 hp
The ampacity of the conductors from the generator terminals to the first distribution device containing overcurrent protection must not be less than what percentage of the nameplate current rating of the generator. 1. 115% 2. 90% 3. 110 % 4. 120%
1. 115%
Using Ohm's Law and NEC Tables for standard sizes of both Standard Ampere Ratings for Fuses/Breakers, and Minimum Size Equipment Grounding Conductors what would be the calculated equipment grounding conductor required for a resistive load of 2275 VA on a 120 VAC circuit? 1. 12 AWG 2. 10 AWG 3. 8 AWG 4. 6 AWG
1. 12 AWG
Where space heating cables are provided, wiring located above heated ceilings shall be considered as operating at an ambient of 50 degrees C and shall be spaced not less than how many inches above the heated ceiling? 1. 2 inches. 2. 4 inches. 3. 6 inches. 4. 8 inches.
1. 2 inches.
The Code regarding overcurrent protection of a single non-motor-operated appliance states that if the branch circuit supplies a single non-motor-operated appliance, the rating of overcurrent protection shall not exceed HOW MANY amperes if the overcurrent protection rating is not marked on the equipment and the appliance is rated 13.3 amperes or less (i.e. nameplate rating of 12 A)? 1. 20 amperes 2. 25 amperes 3. 40 amperes 4. 50 amperes
1. 20 amperes
The luminaires, lighting outlets, and ceiling-suspended (paddle) fans installed in a new outdoor swimming pool installation require a clearance of which of the following? 1. 5 feet horizontally from, and at least 12 feet above the pool. 2. 6 feet horizontally from, and at least 11 feet above the pool. 3. 7 feet horizontally from, and at least 10 feet above the pool. 4. 8 feet horizontally from, and at least 9 feet above the pool.
1. 5 feet horizontally from, and at least 12 feet above the pool.
What depth working space is required given exposed live parts on both sides of equipment if voltage to ground is 601-volts? 1. 5.0 feet 2. 4.5 feet 3. 4.0 feet 4. 3.0 feet
1. 5.0 feet
A metal underground water pipe in direct contact with the earth for 10 feet or more that is electrically continuous and is located not more than 5 feet from the point of entrance to the building. What is the largest copper grounding electrode conductor required? 1. 6 AWG 2. 3/0 AWG 3. 2/0 AWG 4. 1/0 AWG
1. 6 AWG
Where feeder conductors cannot be physically routed outside of buildings, the conductors shall be permitted to be routed through the building if installed with which of the following conditions? 1. Encased in concrete or brick not less than 2 inches thick. 2. When enclosed in a 1-hour fire-rated metal box. 3. Only if installed in Rigid Metal Conduit. 4. If the feeder conductors are terminating in a Nema 4X enclosure.
1. Encased in concrete or brick not less than 2 inches thick.
According the National Electrical Code if an installation requires the use of 6 AWG conductors insulated with XHHW and the job site only has 1-inch FMC available, how many conductors maximum can be pulled in the same raceway? 1. Five 2. Three 3. Two 4. One
1. Five
Which of the following statement best describes the relationship of an electrical circuit? 1. Voltage is inversely proportional to the ampacity. 2. Voltage is directly proportional to the ampacity. 3. Ampacity is increased if voltage increases. 4. Ampacity and voltage are linear components.
1. Voltage is inversely proportional to the ampacity.
According to the National Electrical Code, the definition of "exposed" as applied to live parts, is capable of being inadvertently touched or approached nearer than a safe distance by which of the following? 1. a person 2. a qualified electrician 3. an authority having jurisdiction 4. either maintenance or qualified personnel
1. a person
Electric heating appliances with surface heating elements shall have the heating elements subdivided. Each subdivided load shall not exceed _______ amperes ? 1. 48 2. 60 3. 46 4. 58
1.48
Given a coated 4/0 AWG copper conductor at direct-current resistance at 75 degrees C, determine the resistance of the conductor? 1. 0.0797 ohms/kFT 2. 0.0626 ohms/kFT 3. 0.1996 ohms/kFT 4. 0.1753 ohms/kFT
2. 0.0626 ohms/kFT
In damp or wet locations, surface mounted enclosures shall be weatherproof to prevent moisture entering the box, and must be mounted so there is a minimum of ______ airspace between the enclosure and the wall or other supporting surface. 1. flush mounted 2. 1/4 inch 3. 1/16 inch 4. 3/8 inch
2. 1/4 inch
Where a flexible cord is used to supply a 208/240 volt rating room air conditioner the length of such cord shall not exceed 6 feet. However, if the nominal voltage rating is 120 VAC, the maximum length of the flexible cord shall not exceed what length? 1. 12 feet 2. 10 feet 3. 5 feet 4. 3 feet
2. 10 feet
Under streets, highways, roads, alleys, driveways, parking lots, and other "outdoor" installations, what would be the required direct burial earth cover using rigid metal raceway? 1. 30 inches 2. 24 inches 3. 20 inches 4. 16 inches
2. 24 inches
In a multifamily dwelling, what would be the demand factor permissible to calculate the load of a feeder or service that supplies 14 dwelling units if all the following conditions are met? Use the Optional Method. - No dwelling unit is supplied by more than one feeder - Each dwelling unit is equipped with electric cooking equipment - Each dwelling unit is equipped with an HVAC unit 1. 35% 2. 40% 3. 70% 4. 80%
2. 40%
In other than a dwelling unit (such as commercial occupancies), fixed infrared heating equipment shall be permitted to be supplied from branch circuits rated not over how many amperes? 1. 60 2. 50 3. 40 4. 20
2. 50
Flexible cords and cables must be of the proper type and suitable for the conditions of use and location, therefore, which of the following 600 volt rated cords would be required in a "Wet" location, and "Extra-hard" usage? 1. HDP 2. SOW 3. SPT-1 4. EVJT
2. SOW
According to the NEC, if a 10 foot tapped conductor leaves the enclosure or vault in which the tap is. made, the ampacity of the tap conductor shall not be less than which of the following of the rating of the overcurrent device protecting the feeder conductor? 1. 1/8 2. 1/5 3. 1/10 4. 1/3
3. 1/10
In indoor wet locations, the entire wiring system including all boxes, fittings, raceways, and cables, shall be mounted so that there is at least a HOW MANY inches airspace between it and the wall or supporting surface? 1. 5/8 2. 1/2 3. 1/4 4. 1/8
3. 1/4
Given that a 50 ampere circuit is installed to provide parking lot lighting, what size shall the minimum equipment grounding conductor be? 1. 6 AWG 2. 4 AWG 3. 10 AWG 4. 3 AWG
3. 10 AWG
Assuming that a feeder is protected by a 125 A overcurrent protective device, such as a two-pole breaker or fuse, what would be the maximum continuous resistive load allowed by the NEC for this AC circuit? 1. 150 amperes 2. 125 amperes 3. 100 amperes 4. 80 amperes
3. 100 amperes
According to the NEC, each branch circuit disconnect rated 1000 A or more and installed on solidly grounded wye electrical systems of which of the following voltage systems (but not exceeding 600 volts phase-to-phase) shall be provided with ground-fault protection of equipment? 1. 120/208 single-phase 2. 120/240 three-phase 3. 277/480 three-phase 4. 120/240 single-phase.
3. 277/480 three-phase
Each commercial building shall be provided with at least one sign circuit outlet. Each outlet shall be supplied by a branch circuit rated at least 20 amperes. Therefore, for the purpose of service load calculations, sign and outline lighting outlets shall be calculated at a minimum of HOW MANY volt-amperes for each sign circuit? 1. 4,500 volt-amperes 2. 3,500 volt-amperes 3. 2,100 volt-amperes 4. 1,200 volt-amperes
4. 1,200 volt-amperes
What is the minimum ampacity required for a separate overload device if the motor load is a continuous duty 208-volt, three-phase, 2-hp motor with a nameplate rating of 10 A.? 1. 14 amperes 2. 12.5 amperes 3. 12 amperes 4. 11.5 amperes
4. 11.5 amperes
Given an installation of switchboards, switchgear, or panelboards, the potential coils shall be supplied by a circuit that is protected by standard overcurrent devices at what rating or less.. 1. 40 amperes 2. 30 amperes 3. 20 amperes 4. 15 amperes
4. 15 amperes
Given a location of assembly where a large group of people congregates, such as an auditorium or theatre, the manual switch that controls emergency lighting shall be located or at a place conveniently accessible thereto? 1. In the exterior of the building. 2. In the location where the group would be seated. 3. In the office area. 4. In the lobby.
4. In the lobby.
The National Electrical Code states that "Motor and motor-operated equipment receiving electric energy from more than one source shall be provided with disconnecting means from each source of electric energy ______ 1. within sight of the equipment. 2. completely isolated from the equipment. 3. within 50 feet of the equipment being served. 4. immediately adjacent to the equipment served.
4. immediately adjacent to the equipment served.
If the ungrounded service-entrance conductors are installed in parallel in two or more raceways or cables, the grounded conductor shall also be which of the following? 1. installed in each parallel raceway 2. installed in separate raceways. 3. bonded at both ends of the raceway 4. bonded at only one end of the raceway
1. installed in each parallel raceway
Appliances shall be protected against overcurrent, therefore, infrared lamp commercial and industrial heating appliances shall have overcurrent protection not exceeding how many amperes? 1. 45 amperes 2. 50 amperes 3. 55 amperes 4. 60 amperes
2. 50 amperes
Raceways that are prewired, modular, or surface-mounted raceways of manufactured wiring systems and associated components shall be listed for the use and rated at what nominal voltage and ampacity? 1. 400 volts, 10 amps. 2. 500 volts, 15 amps. 3. 600 volts, 20 amps. 4. 650 volts, 15 amps.
3. 600 volts, 20 amps.
The ampacity of conductors that connect a capacitor to the terminals of a motor or to motor circuit conductors shall not be less than one-third the ampacity of the motor circuit conductors and in no case less than? 1. 135% 2. 120% 3. 115% 4. 100%
1. 135%
All metal parts associated with the spa or hot tub shall be bonded with the provisions of: interconnection. of threaded metal piping and fittings, or metal-to-metal mounting on a common frame/base, or a solid copper bonding jumper, insulated, covered, or bare, not smaller than ______ 1. 8 AWG 2. 10 AWG 3. 12 AWG 4. 14 AWG
1. 8 AWG
Generators shall be of a type suitable for the locations in which they are installed, and the nameplate or manufacturer's instructions shall provide the rated frequency, the number of phases if AC system, etc. for all stationary generators and portable generators rated more than how many watts: 1. 5 kW 2. 10 kW 3. 15 kW 4. 48 kW
3. 15 kW
Generators shall meet the requirements for motors per the NEC Article 430, and shall also be of a type ______ for the locations in which they are installed? 1. labeled 2. unlisted 3. suitable 4. marked
3. suitable
Any building or portions of buildings or structures (except for the assembly occupancies) designed or intended for the gathering together of HOW MANY persons for such purposes as deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, or similar purposes, is considered a Place of Assembly. 1. 20 or more persons 2. 60 or more persons 3. 80 or more persons 4. 100 or more persons
4. 100 or more persons
The standard ampere rating for an inverse time circuit breaker or fuse shall not be less than 100% of the noncontinuous load, plus 125% of the continuous load(s). So if the breaker protects a 200 A feeder with a noncontinuous load, what size OCP is required? 1. 200 ampere 2. 300 ampere 3. 350 ampere 4. 400 ampere
1. 200 ampere
Multiple-outlet branch circuits rated at larger than 50 amperes shall NOT supply which of the following loads? 1. lighting 2. infrared heating 3. cooking appliances 4. utilization equipment
1. Lightning
Cable tray systems shall be permitted to have which of the following? 1. unstable segments. 2. flexible segments. 3. mechanically discontinuous segments. 4. rigid segments.
3. mechanically discontinuous segments.
When referring to recreational vehicle parks, the National Electrical Code states; "electrical services and feeders shall be calculated on the basis of not less than HOW MANY volt-amperes per site equipped with 50-ampere, 208Y/120 or 120/240-volt supply facilities?" 1. 12,000 volt amperes 2. 3,600 volt amperes 3. 2,400 volt amperes 4. 600 volt amperes
1. 12,000 volt amperes
With respect to overhead conductors and open overhead wiring, swimming pool and similar installations of water bodies what would be the minimum clearance directly above the water level to any power conductors? 1. 22.5 feet 2. 18.0 feet 3. 17.0 feet 4. 10.0 feet
1. 22.5 feet
The motor branch-circuit short-circuit and ground-fault protective device (fuse or breaker) rating or setting shall not exceed WHAT PERCENTAGE of the full load current (FLC) values found in Tables 430.248 and 430.250, assuming the OCP is an inverse time circuit breaker for a three-phase Design B motor? 1. 250 % 2. 300 % 3. 400 % 4. 600 %
1. 250 %
What would be the minimum copper-clad aluminum equipment grounding conductor given that a 1,200 A overcurrent protective device is sourcing 7 parallel feeders circuits installed with 4/0 aluminum THW conductors installed in PVC raceway? 1. 250 kcmil 12. 4/0 AWG 3. 2/0 AWG 4. 1/0 AWG
1. 250 kcmil
According to the National Electrical Code, electrically operated in-sink waste disposers shall be permitted to be cord-and-plug-connected with a flexible cord of a maximum of what length? 1. 36 inches 2. 26 inches 3. 18 inches 4. 16 inches
1. 36 inches
Given that a dwelling has a total of five (5) small-appliance branch circuits, what shall be added to the service load calculation? 1. 5 each at 20 amperes. 2. 5 each at 10 amperes. 3. 2 each at 20 amperes, 3 at 10 amperes. 4. 4 each at 20 amperes, 1 at 10 amperes
1. 5 each at 20 amperes
Service conductors and equipment used on circuits exceeding 1000 volts, nominal, shall require the service entrance conductor to be a minimum of what size (unless in multiconductor cable)? 1. 6 AWG 2. 8 AWG 3. 10 AWG 4. 12 AWG
1. 6 AWG
Where energized parts are exposed (such as motor control centers), the minimum clear work space shall be not less than HOW HIGH (measured vertically from the floor or platform) or not less than 3 feet wide (measured parallel to the equipment). 1. 6 feet 6 inches 2. 6 feet 8 inches 3. 6 feet 10 inches 4. 7 feet 7 inches
1. 6 feet 6 inches
In the calculation of a feeder or service neutral load, a load shall be permitted to have an additional percent applied to the amount that exceeds 200 amperes where the feeder or service is supplied from a 3-wire dc or single-phase ac system. 1. 70 2. 30 3. 40 4. 60
1. 70
Where a busway is used as a feeder rated at 750 amperes, what is the required busway overcurrent device standard rating? 1. 800 2. 600 3. 650 4. 750
1. 800
Provided that a circuit breaker is rated at 400 amperes and the feeder consists of two Type MC cables rated at 200 amperes per cable, which of the following statements is true with respect to the installation of the equipment grounding conductors for each cable? 1. A 3 AWG equipment grounding conductor is required to be installed in each of the cables. 2. A 6 AWG equipment grounding conductor is to be installed in only one of the cables. 3. A 1 AWG equipment grounding conductor is to be placed in each of the cables. 4. A 4 AWG equipment grounding conductor is to be installed in only one of the cables.
1. A 3 AWG equipment grounding conductor is required to be installed in each of the cables.
Locked rotor indicating code letters marked on motor nameplates to show motor input with locked rotor shall be in accordance with Article 430 of the NEC. Therefore, which of the following would draw the highest locked rotor current (kilovolt amperes per horsepower)? 1. Code letter G 2. Code letter E 3. Code letter C 4. Code letter B
1. Code letter G
A facility producing electric power on site as the alternate supply of electric power, is defined be the NEC as an à on-site standby generatora Which of the following equipment is permitted to be supplied by an on-site standby generator? 1. Fire Pump, Emergency, Legally required standby systems, and Optional standby systems. 2. Fire Pump, Emergency, and Legally required standby systems only. 3. Fire Pump, and Emergency only. 4. Fire Pump only.
1. Fire Pump, Emergency, Legally required standby systems, and Optional standby systems.
Electrical appliances such as, vending, spray washing, tire inflation or automotive vacuum machines shall be designed and installed with approved protection for personnel (public use) by which of the following devices? 1. GFCI protection (Class A) 2. Arc Fault Circuit Interrupter (AFCI) 3. Overcurrent protection for personnel 4. Receptacles that are listed for such use
1. GFCI protection (Class A)
According to the National Electrical Code, which of the following would require GFCI (ground-fault circuit-interrupter protection) if the 120-volt single-phase equipment is replaced for maintenance or repair? Assume service is on an existing installation. 1. Pool pump motor receptacle 2. Laundry area receptacle 3. Balcony or Porch receptacle 4. Garage or Basement receptacle
1. Pool pump motor receptacle
Referring to the Article on Energy Management Systems, which is the only place that this definition applies, what is the predetermined process of connecting, disconnecting, increasing, or reducing electric power? 1. control. 2. load management. 3. observe. 4. record.
1. control.
According to the National Electrical Code, if a swimming pool control panel feeder is installed with equipment grounding and neutral conductors, where must the neutral conductor terminate or connect? 1. panel enclosure. 2. phase bus 3. grounding electrode 4. grounded bus
1. panel enclosure.
Safe work space designed for personnel entry into electrical enclosures is required for employees to conduct examination, adjusting, servicing, or maintenance of live parts while energized. Which of the following is true concerning the work space? 1. specifically fabricated for this purpose. 2. work space is too small. 3. live parts are too close together. 4. work space is insulated for this purpose.
1. specifically fabricated for this purpose.
On elevators (dumbwaiters, escalators, moving walks, platform lifts, and stairway chairlifts) with generator field control, the disconnecting means shall be located within sight of the motor controller for ________ 1. the driving motor of the motor-generator set 2. outside the hoistway and accessible to qualified persons only 3. fused or non-fused, enclosed, externally operable motor circuit switch 4. listed device and shall comply with emergency or standby power systems
1. the driving motor of the motor-generator set
Overhead wiring shall be installed to avoid possible contact with masts and other parts of boats being moved in a marina boat yard. These conductors and cables shall be routed to avoid wiring closer than HOW MANY feet from the outer edge or any portion of the yard that can be used for moving vessels? 1. 24 feet 2. 20 feet 3. 16 feet 4. 12 feet
2. 20 feet
What is the minimum size equipment grounding conductor for grounding raceway and equipment of a 200-amp, single-phase, three-wire feeder? 1. 12 AWG 2. 6 AWG 3. 10 AWG 4. 2 AWG
2. 6 AWG
No piping, ducts, or other foreign equipment to the electrical installation shall be located in the dedicated electrical space to a height of how many feet directly above equipment such as an indoor 3 phase electronic service switch? 1. 2 feet 2. 6 feet 3. 8 feet 4. 10 feet
2. 6 feet
Grounded conductor, bonding conductors, and jumpers, where installed on the outside of a raceway or enclosure, the length of the jumper shall not exceed HOW MANY FEET and shall be routed with the raceway or enclosure? 1. 2 feet. 2. 6 feet. 3. 12 feet. 4. 15 feet.
2. 6 feet.
Surface-mounted or recessed incandescent luminaires, or LED luminaires with completely enclosed light sources are permitted in clothes closets. However, the minimum clearance between luminaires installed in clothes closets and the nearest point of a clothes closet storage space shall be at least how many inches? 1. 3 inches 2. 6 inches 3. 16 inches 4. 32 inches
2. 6 inches
Where ground-fault circuit interrupter protection is provided, luminaires and ceiling-suspended (paddle) fans located over the spa or hot tub must be minimum mounting height of how many feet? 1. 6 feet 7 inches 2. 7 feet 6 inches 3. 10 feet 4. 12 feet
2. 7 feet 6 inches
It shall be permissible to calculate the load for commercial electric cooking equipment, dishwasher booster heaters, water heaters, and other kitchen equipment in accordance with NEC. So if the kitchen has four pieces of equipment with thermostatic control, what would be the demand factor to size the feeder or service load? 1. 100% 2. 80% 3. 75% 4. 60%
2. 80%
Enclosures, frames, fittings, and other metal noncurrent-carrying parts that are to serve as equipment grounding conductors, shall be bonded where necessary to ensure electrical continuity and the capacity to conduct safely any fault current likely to be imposed on them. When contact points or surfaces are covered with nonconductive paint or like coatings, the coating must be removed or shall be connected by fittings designed as to make such removal ______ 1. required. 2. unnecessary. 3. difficult. 4. inaccessible.
2. Unnecessary.
Given that an Electrical Plan Set shows a roof top unit (RTU) on the Power Plan Roof detail, where would the equipment service disconnecting means be located for this device? 1. at one of the panelboards 2. at the unit 3. in the main panel 4. at the service
2. at the unit
Buildings or other structures supplied by a feeder or branch circuits in a multiple-occupancy building shall have the service disconnecting means for each occupant's supply accessible by which of the following? 1. building maintenance 2. each occupant 3. property manager 4. authority having jurisdiction
2. each occupant
Type MC cable shall be permitted to be unsupported and unsecured where the cable is not more than HOW MANY feet in length from the last point of cable support to the point of connection to luminaires or other electrical equipment and the cable and point of connection are within an accessible ceiling? 1. 8 feet 2. 6 feet 3. 4 feet 4. 2 feet
2.6 feet
Generators shall be of a type suitable for the locations in which they are installed, and the nameplate or manufacturer's instructions shall provide the rated frequency, the number of phases if AC system, etc. for all stationary generators and portable generators rated more than how many watts: 1. 5 kW 2. 10 kW 3. 15 kW 4. 48 kWn
3. 15 kW
Appliances shall be protected against overcurrent, including appliances employing resistance type heating elements, such as, listed instantaneous water heaters. However, the maximum overcurrent protection device shall be limited to how many amperes? 1. 120 2. 148 3. 150 4. 160
3. 150
Overhead service conductors shall not be smaller than 8 AWG copper, and shall have what minimum clearance assuming the installation is over public streets, alleys, roads, parking areas subject to truck traffic? (Assume a temporary installation) 1. 24-1/2 feet 2. 20 feet 3. 18 feet 4. 16 feet
3. 18 feet
The National Electrical Code does permit the reduction of the grounded conductor of a service or feeder depending on the service and loads. However, the grounded conductor shall not be smaller than specified in a Table of the NEC. Therefore, if the service HOT conductors are trade size 4/0 AWG, what is the minimum required NEUTRAL conductor for this service? 1. 350 kcmil 2. 250 kcmil 3. 2 AWG 4. 1 AWG
3. 2 AWG
The NEC permits various types of equipment grounding conductors, including but not limited to; Conductors, RMC, IMC, EMT, and listed FMC. However, if flexible metal conduit is used, the circuit conductors contained in the conduit shall be protected by overcurrent devices rated at a maximum of how many amperes? 1. 45 amperes 2. 35 amperes 3. 20 amperes 4. 15 amperes
3. 20 amperes
Electrical conductors and equipment connecting an electric vehicle or EVSE (Electric Vehicle Supply Equipment) located at a height of not less than 18 inches above the floor level for indoor locations or HOW MANY inches above the grade level for outdoor locations? 1. 48 inches 2. 32 inches 3. 24 inches 4. 18 inches
3. 24 inches
If spray application operations are conducted within a closed-top, open-face, or open-front booth or room, any electrical wiring or utilization equipment located outside of the booth or room but within HOW MANY FEET of any opening shall be suitable for Class I, Division 2? 1. 12 feet 2. 6 feet 3. 3 feet 4. 2 feet
3. 3 feet
What would be the minimum feeder neutral conductor required given the following conditions: - Service is a 120/240 V, 200 A, single-phase, 3-wire system. -Load calculation results in an unbalance of 150 amperes. 1. 3/0 AWG 2. 1/0 AWG 3. 4 AWG 4. 6 AWG
3. 4 AWG
Resistance-type heating elements in electric space-heating equipment shall be protected (overcurrent protection) at not more than 60 amperes, and these loads shall be subdivided loads that do NOT exceed how many amperes? 1. 60 amperes. 2. 55 amperes. 3. 48 amperes. 4. 40 amperes.
3. 48 amperes
Given that an Electrical Plan Set shows a 200A service disconnect with an intersystem bonding termination device connected to a communications backboard ground bar, what would be the required equipment grounding conductor size between these two pieces of equipment? 1. 3 2. 4 3. 6 4. 8
3. 6
Each commercial building and each commercial occupancy accessible to pedestrians shall be provided with at least HOW MANY 20 ampere outlet(s) in an accessible location at each entrance to each tenant space for sign or outline lighting system use? 1. Three 12. Two 3. One 4. Zero
3. One
Equipment grounding conductor connections at the source of separately derived systems, such as 208Y/120-volt derived from a 3-phase, 4-wire, wye-connected grounded system shall NOT be made by bonding the equipment grounding conductor(s) to which of the following? 1. grounding electrode conductor 2. grounded service conductor 3. panel enclosure 4. phase conductor
3. Panel enclosure
In outdoor pool areas, luminaires, lighting outlets, and ceiling-suspended (paddle) fans installed above the pool are required to be what height above the pool and what horizontal distance from the inside wall of the pool? 1. there is no requirement. 2. a height of 7 ft 6 in with no minimum requirement from the inside wall of a pool. 3. a distance of 12 feet in height and 5 feet horizontally from the inside walls of the pool. 4. a minimum height of 10 ft with a minimum distance of 5 ft from the inside walls of a pool.
3. a distance of 12 feet in height and 5 feet horizontally from the inside walls of the pool.
Per the NEC, flexible cords, flexible cables, cord sets, and power supply cords shall be permitted to be attached to building surfaces with which of the following conditions (consider all exceptions)? 1. temporary wiring that is 14 AWG or smaller 2. feeder circuits operating on less than 600V 3. branches from busways 4. not permitted
3. branches from busways
Arc-fault circuit interrupter protection (AFCI) protection shall be provided as required. In consideration of the exception to the code which allows AFCI protection not be required for an individual branch circuit supplying a fire alarm system installed in the closet of a dwelling unit. The branch circuit is to be installed in which of the following? 1. flexible metallic tubing with nonmetallic boxes 2. type SE cable with nonmetallic boxes 3. electrical metallic tubing with metal boxes 4. Armored Cable with nonmetallic boxes
3. electrical metallic tubing with metal boxes
Given a 120/240-volt single-phase electrical branch circuit is to be installed for a 40 A cooking range receptacle, what would be the required minimum size non-metallic sheathed cable required for this installation? 1. equipment grounded conductor of a 10-2 with ground type NM cable. 2. equipment grounded conductor of a 10-3 with ground type NM cable. 3. equipment grounded conductor of a 8-2 with ground type NM cable. 4. equipment grounding conductor of a 8-3 with ground type NM cable.
3. equipment grounded conductor of a 8-2 with ground type NM cable.
Service conductors and equipment for control and protection of services and their installation shall be considered outside of a building or other structure under any of the following conditions, EXCEPT which of the following? 1. encased in brick less than 2 inches thick. 2. where installed in any vault per Section 430. 3. if installed in a wall cavity or attic space. 4. encased in concrete less than 2 inches thick.
3. if installed in a wall cavity or attic space.
The rating of a service disconnecting means is based on one or two branch circuits, or a dwelling 3-wire circuit. Therefore, if the installation is to supply only limited loads of a single (one) branch circuit, the service disconnecting means shall have a rating of not less than how many amperes? 1. 100 amperes 2. 80 amperes 3. 30 amperes 4. 15 amperes
4. 15 amperes
The highest current at rated voltage that a device is identified to interrupt under standard test conditions, and safely open fault current is defined as the ? 1. Full load current rating 2. Short current rating 3. Fault current rating 4. Interrupting rating
4. Interrupting rating
If a second Building # 2 is supplied by a 100 A feeder, the equipment grounding conductor shall be run with the supply conductors and be connected to which of the following? 1. an isolated grounding terminal and grounding electrode 2. a common terminal bar that is isolated from the panelboard enclosure 3. an isolated grounded terminal bar that is not bonded to the grounding electrode system 4. a separate terminal bar that is bonded to the panelboard enclosure and connected to a grounding electrode system
4. a separate terminal bar that is bonded to the panelboard enclosure and connected to a grounding electrode system
Grounding electrode conductors at the service at each building shall be installed such that the raceways and enclosures of the entire system be electrically contiguous providing a direct or parallel path for which of the following? 1. isolation 2. insulation 3. continuity 4. bonding
4. bonding
Bonding loosely jointed metal raceways, expansion, expansion-deflection, or deflection fittings and telescoping sections of metal raceways shall be made electrically continuous by which of the following methods? 1. any grounded equipment 2. main grounding conductor 3. supply-side bonding jumper 4. equipment bonding jumper or other means
4. equipment bonding jumper or other means
According to the National Electrical Code, if an installation requires a panelboard be sourced directly from the service, what must be provided for the equipment grounding conductors secured inside the cabinet? 1. insulated busbar that is common 2. individual terminal that is also used for grounded conductors 3. insulated equipment grounded termination 4. isolated equipment grounding terminal bar
4. isolated equipment grounding terminal bar
To provide ready and safe access in underground and subsurface enclosures into which persons enter for installation and maintenance, conductors shall be 1. bundled. 2. tied together. 3. color-coded. 4. racked.
4. racked.
Given the scenario that the panelboard is used with nonmetallic raceway or cable or separate equipment grounding conductors are provided, what is the required action for the equipment grounding terminal bar? 1. it is separated from the panelboard 2. to be located where interconnection between equipment grounding conductors and grounded circuit conductors are permitted 3. used to terminate a single terminal if the terminal is identified for connection of more than one conductor. 4. secured inside the panelboard
4. secured inside the panelboard
According to the National Electrical Code, an individual dry-type transformer of more than 112.5 kVA rating shall be installed in a ______ of fire-resistant construction having a minimum fire rating of 1 hour? 1. partition, wall, or ceiling 2. locked room 3. fire-resistant vault 4. transformer room
4. transformer room
Equipment grounding conductors of bare, covered, or insulated aluminum or copper-clad aluminum of the wire type shall not be smaller than shown in Table 250.122, and shall not be terminated within what distance of the earth? 1. 18 inches 2. 16 inches 3. 8 inches 4. 4 inches
1. 18 inches
For PV systems with an inverter generating capacity of 100 kW or greater, a documented and stamped PV system design, using an industry standard method maximum current calculation provided by a licensed professional electrical engineer, shall be permitted. The calculated maximum current value shall be based on the _____ highest current average resulting from the simulated local irradiance on the PV array accounting for elevation and orientation. 1. 3-hour 2. 5-hour 3. 7-hour 4. 1/2-hour
1. 3-hour
What would be the full load current for a typical 10 horse power belted motor running at normal speed and torque if the electrical source was 208-volt three-phase power? 1. 30.8 2. 46.2 3. 59.4 4. 74.8
1. 30.8
All dwelling 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices nstalled in a dwelling unit ______ shall be protected by an arc-fault circuit interrupter protection (AFCI) nstalled in a readily accessible location? 1. carport 2. kitchen 3. loft 4. basement
2. kitchen
A disconnecting means shall be provided to disconnect power to all electronic equipment in the information technology equipment room or in designated zones within the room by which of the following? 1. dedicated receptacles 2. remote disconnect control 3. device protected by an automatic fire suppression system 4. supply circuits and interconnecting cables that are not terminated
2. remote disconnect control
Underground cable and conductors of a 120-volt circuit to a parking lot sign must have a conduit or raceway that is which of the following? 1. secured with conduit bushings. 2. sealed or plugged at either or both ends. 3. adjusted for radiant temperature variations. 4. sized up to accommodate for a damp or wet installation.
2. sealed or plugged at either or both ends.
A combination of a current transformer and overcurrent relay shall be considered equivalent to an overcurrent trip unit. Therefore, per the NEC a fuse or an overcurrent trip unit of a circuit breaker shall be connected in series with which of the following conductors? 1. grounding 2. ungrounded 3. grounded 4. any conductor
2. ungrounded
Cable trays used to support service-entrance conductors shall contain only service-entrance conductors, and be identified with permanently affixed labels with the wording "Service-Entrance Conductors." The labels shall be located so as to be visible after installation with a spacing not to exceed HOW MANY feet so that the service-entrance conductors are able to be readily traced through the entire length of the cable tray? 1. 18 feet 2. 15 feet 3. 10 feet 4. 8 feet
3. 10 feet
one 120-volt receptacle outlet shall be installed within 18 inches of the top of a show window for At least every _____ linear feet of show window area measured horizontally at its maximum width? 1. 2 2. 6 3. 12 4. 15
3. 12
A separate overload device shall be selected to trip at no more than 125 percent of the motor nameplate full-load current rating. Based on this requirement, what would be the calculated load for a high torque 5-HP motor, with a nameplate of 480-volt, 3-phase, 10 amperes, and service factor of 1.15? 1. 14.5 amperes. 2. 13.5 amperes. 3. 12.5 amperes. 4. 11.5 amperes.
3. 12.5 amperes.
In motion picture, television studios and similar locations, each receptacle of dc plugging boxes shall be rated at not less than HOW MANY amperes? 1. 15 amperes 2. 20 amperes 3. 25 amperes 4. 30 amperes
4. 30 amperes
Conductors at terminals that enter or leave cabinets or cutout boxes must maintain a minimum wire bending space of how many inches, given that a 1/0 AWG conductor does leave the enclosure through the wall opposite its terminal? 1. 2-1/2 inches. 2. 3-1/2 inches. 3. 4-1/2 inches. 4. 5-1/2 inches.
4. 5-1/2 inches.
Equipment grounding conductors, grounding electrode conductors, and bonding jumpers shall NOT depend solely on what type of the following connection methods? 1. Thread-forming machine screws 2. Machine screw-type fasteners 3. Pressure connectors 4. Solder-type connections
4. Solder-type connections
What shall be provided to protect exposed current carrying parts of motors and the insulation of motor leads where installed directly under equipment where dripping or spraying liquids may occur? 1. Rubber grommets 2. Environmental seals 3. Silicon enclosure entrances 4. Suitable guards or enclosures
4. Suitable guards or enclosures
