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Question 1 of 100
Type MV cable (Medium Voltage) shall be permitted for use on power systems rated up to and including 35,000 volts, nominal, in which of these circumstances:
Question 2 of 100
Using the Standard Method, what is the calculated service rating for a 1500 square feet dwelling with the following: (2) 20-A small appliance circuits
**Note – use the column C method, rather than the column A method for this specific problem**
Question 3 of 100
Where CNG or LNG dispensers are installed beneath a canopy or enclosure, all electrical equipment installed beneath the canopy or enclosure shall be suitable for ___________ hazardous (classified) locations.
Question 4 of 100
The ampacity of the supply conductors for an individual resistance welder that can be operated at different times at different values of primary current or duty cycle shall not be less than ____________ of the rated primary current for seam and automatically fed welders.
Question 5 of 100
Where heating equipment is supplied by more than one source, feeder, or branch circuit, the disconnecting means shall be ______________.
Question 6 of 100
When connecting energy storage systems to other sources, only inverters and ac modules listed and identified as __________ shall be permitted on interactive systems.
Question 7 of 100
In a major repair garage where natural gas vehicles are repaired, the area within 18 inches of the ceiling is considered what classification?
Question 8 of 100
Calculate the maximum demand load for a single branch circuit supplying a counter-mounted cooking unit and two wall-mounted ovens, all located in the same room. The counter-mounted unit has a nameplate rating of 6 kW, and each wall-mounted oven has a rating of 4 kW.
Question 9 of 100
A bank has a total square footage of 25,000sq-ft, and there are 250 receptacles installed. Determine the largest receptacle load to be applied to the total demand load.
Question 10 of 100
A restaurant has all electric appliances, a connected lighting load that includes a sign, totaling 50,000 VA. The electrical service is rated at 120/208V, three-phase.
The restaurant contains the following loads:
120-volt loads
60 duplex receptacles 100 ft multi-outlet assembly (simultaneous rated) 1 broiler 5 kW 2 deep fryers 5.5 kW 1 freezer 3,400 VA 1 booster heater 1,500 VA 1 coffee service machine 3,500 VA 1 dishwasher 3,500 VA
208-volt loads
1 walk-in cooler 6,400 VA 1 water heater 4,800 VA 1 oven 20 kW 1 range 15 kW 2 convection ovens 8kW 15kW electric heater 14 kW AC 3 exhaust fans 2.4 amperes 1 cooktop 10kW 2 10kw heating units.
Question 11 of 100
What are the primary and secondary overcurrent protection devices for a 75kVA three-phase, 480V/208Y transformer?
Question 12 of 100
A phase converter with a nameplate single-phase input rating of 100 FLA, protecting variable loads, shall have overcurrent protection set at not more than __________.
Question 13 of 100
What is the maximum size overcurrent protection device required to protect 14 AWG copper conductors used for a pump motor control-circuit that is protected by a motor branch circuit protection device and extends beyond the enclosure?
Question 14 of 100
Aircraft energizers shall be designed and mounted such that all electrical equipment and fixed wiring will be at least _____________________ above floor level.
Question 15 of 100
Permanently attached power supply cable(s) for overhead gantries shall be provided with __________ upon exposure to strain that could result in either cable damage or separation from the power delivery device and exposure of live parts.
Question 16 of 100
A mobile home floor is 70 ft by 10 ft and has two small appliance circuits; a 1000-VA, 240-V heater; a 200-VA, 120-V exhaust fan; a 400-VA, 120-V dishwasher; and a 7000-VA electric range.
Question 17 of 100
Each conductor of a lead-in from an outdoor antenna shall be provided with a(n)____.
Question 18 of 100
An energy management system shall not override the load shedding controls for the following:
Question 19 of 100
What are the minimum size THWN conductors required to feed the primary side of a 112.5kVA three-phase 480V/208V transformer?
Question 20 of 100
On a property where flammable liquids are received by a pipeline and are blended in bulk and stored, the area within 3 ft of the edge of outdoor equipment, extending in all directions, shall be considered a ____________ environment
Question 21 of 100
The rating of the overcurrent protective device for the circuit supplying the industrial control panel shall not be greater than the sum of the largest rating of the branch-circuit short-circuit and ground-fault protective device provided with the industrial control panel, ____________, plus the sum of the full-load currents of all other motors and apparatus that could be in operation at the same time.
Question 22 of 100
Fire alarm circuits shall be identified at terminal and junction locations in a manner that ____________ during testing and servicing of other systems.
Question 23 of 100
Underground wiring in motor fuel dispensing facilities shall be installed in threaded rigid metal conduit, or threaded steel intermediate metal conduit, or where buried under not less than __________ of cover, shall be permitted to be installed in Type PVC, Type RTRC, or Type HDPE conduit.
Question 24 of 100
A thermal barrier shall be required if the space between the resistors and reactors and any combustible material is less than_____.
Question 25 of 100
As a fixed wiring method encased in __________ inch(es) of concrete, nonmetallic raceways shall be permitted to be used where installed in an occupancy where 100 or more people gather or assemble.
Question 26 of 100
Type ITC cable shall not be installed on circuits operating at more than______________________.
Question 27 of 100
Power-limited control power sources, other than transformers, shall be protected by overcurrent devices rated at not more than _________ of the VA rating of the source divided by the rated voltage.
Question 28 of 100
Where capacitors are installed in motor circuits, conductors shall not be less than _____________ of the rated current of the capacitor.
Question 29 of 100
A three-phase 230V wound-rotor motor rated at 15HP requires short-circuit and ground-fault protection. The manufacturer calls for a nontime delay fuse to protect the motor. What size fuse shall be selected?
Question 30 of 100
An industrial machine’s name plate shall be attached to the control equipment enclosure or machine and shall be plainly visible after installation. The nameplate shall include:
Question 31 of 100
Where the outer sheath of a mineral-insulated, metal-sheathed cable is made of __________, it shall provide an adequate path to serve as an equipment grounding conductor.
Question 32 of 100
Luminaires shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temperatures in excess of _________________.
Question 33 of 100
Collector rings on electrically driven irrigation machines, where used for control and signal purposes, shall have a current rating not less than ___________ of the full-load current of the largest device served plus the full-load current of all other devices served.
Question 34 of 100
The branch-circuit rating for an appliance that is a continuous load shall not be less than _______________ of the marked rating.
Question 35 of 100
Raceways shall be used only as a means of support for other raceways where the raceway _______________.
Question 36 of 100
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is _________ in color or by other effective means.
Question 37 of 100
What is the allowable ampacity for a flexible 3-conductor Type SO-cord with three current-carrying 12AWG conductors?
Question 38 of 100
Heat-resistant thermoplastic-insulation covering 8AWG conductors are listed for use in _______________ locations.
Question 39 of 100
Multi-wire branch circuits that supply two pieces of utilization equipment, and are not protected by an overcurrent device which opens all ungrounded conductors simultaneously, shall supply only _______________.
Question 40 of 100
Overhead conductors for festoon lighting shall not be smaller than 12 AWG unless the conductors are __________.
Question 41 of 100
Tap conductors not over _______________ feet long and do not extend beyond the switchboad, switchgear, panelboard, disconnecting means, or control devices they supply shall be permitted to be tapped without overcurrent protection at the tap.
Question 42 of 100
Where tap conductors supply a transformer and the total length of one primary plus one secondary conductor, excluding any portion of the primary conductor that is protected at its ampacity, is not over 25ft, conductors shall __________.
Question 43 of 100
The minimum overhead clearance from water level to an insulated overhead 240-volt feeder traveling over a pool and supported on a steel messenger cable is _______________ feet.
Question 44 of 100
Copper conductors, for each phase, polarity, neutral, or grounded circuit shall be permitted to be connected in parallel only in sizes _______________.
Question 45 of 100
Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within _______________ inches of the wall.
Question 46 of 100
Conductors installed in RMC in a trench below 2 inches of thick concrete must have minimum cover of _______________inches.
Question 47 of 100
In a grounded system, if the source of the separately derived system and the first disconnecting means are located in separate enclosures, a supply-side bonding jumper shall be installed with the circuit conductors from the source enclosure to the first disconnecting means. A supply-side bonding jumper shall not be required to be larger than the _______________ conductors.
Question 48 of 100
The service conductor ampacity for a single-phase 240/120V Single-Family Dwelling rated 100-400A shall be permitted to have an ampacity not less than __________ of the service rating.
Question 49 of 100
At all points where the armor of __________ cable terminates, a fitting shall be provided to protect wires from abrasion, unless the design of the outlet boxes or fittings is such as to afford equivalent protection, and, in addition, an insulating bushing or its equivalent protection shall be provided between the conductors and the armor.
Question 50 of 100
Optional feeder and service load calculations shall be permitted for a dwelling unit having the total connected load served by a single 120/240V or 208Y/120V set of __________ service or feeder conductors with an ampacity of 100 or greater.
Question 51 of 100
Receptacles installed in a kitchen to serve countertop surfaces shall be supplied by not fewer than _______________ small-appliance branch circuit(s).
Question 52 of 100
Conductors that supply one or more welders shall be protected by an overcurrent device rated or set at not more than _______________ percent of the conductor ampacity.
Question 53 of 100
Communications, radio, and television coaxial cables shall be permitted at a height of not less than __________ above swimming and wading pools, diving structures, and observation stands, towers, or platforms.
Question 54 of 100
A 120-208V 3-phase panel with exposed live parts on one side, and no live or grounded parts on the other side of the working space, must have a minimum clear working distance of _______________ in front of panel.
Question 55 of 100
The total cross-sectional area of a 2 inch EMT conduit is 3.356 square inches and has (6) 12AWG conductors inside it. What is the total area allowed to be taken up by all conductors in this conduit?
Question 56 of 100
In an electrical room with exposed 480/277V live parts on one side of the working space and grounded parts on the other side of the working space, the minimum depth of working space in front of this equipment shall be _______________.
Question 57 of 100
The supply-side bonding jumper for a 240V single-phase service fed with (2) parallel 300 kcmil Aluminum ungrounded conductors is _______________ aluminum.
Question 58 of 100
A concrete-encased electrode shall consist of at least 20 feet of:
Question 59 of 100
__________ where the tubing is terminated in listed fittings and the circuit conductors contained in the tubing are protected by overcurrent devices rated at 20A or less are allowed to be considered an equipment grounding conductor.
Question 60 of 100
The operating handle of a circuit breaker shall be permitted to be accessible _______________ opening a door or cover.
Question 61 of 100
Type MC cable that contains a(n) _______________ or uninsulated equipment grounding conductor can be used as an EGC.
Question 62 of 100
In a(n) _______________ system, electrical equipment, wiring, and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedance circuit from any point on the wiring system to the electrical supply source to facilitate the operation of overcurrent devices should a second ground fault from a different phase occur on the wiring system.
Question 63 of 100
Overcurrent protection for supply conductors as part of a Modular Data Center, shall:
Question 64 of 100
A dwelling has 9 ranges installed. Each range has a rating of 8 kW. What is the maximum demand load that should be used for calculating the service and feeder size?
Question 65 of 100
Determine the maximum size inverse-time breaker to be installed as motor short-circuit and ground-fault protection for a 25HP, 460V, 3-phase, squirrel-cage motor.
Question 66 of 100
Class 1 Power-Limited Circuits shall be supplied from a source that has a rated output of not more than _______________ volts and 1000 volt-amperes.
Question 67 of 100
The service disconnecting means for each service shall consist of a combination of not more than _______________ switches or sets of circuit breakers.
Question 68 of 100
Busway runs that have sections located both inside and outside of buildings shall have a(n) _______________ at the building wall to prevent interchange of air between indoor and outdoor sections.
Question 69 of 100
Electrified truck parking space equipment provided from either overhead gantry or cable management systems shall _______________ in electrified truck parking space supply equipment.
Question 70 of 100
Equipment intended to interrupt current at other than fault levels shall have an interrupting rating at nominal circuit voltage _______________ the current that must be interrupted.
Question 71 of 100
Infrared industrial process heating equipment lampholders shall be permitted to be operated in series on circuits of _______________, provided the voltage rating of the lampholders is not less than the circuit voltage.
Question 72 of 100
In generator sets driven by a prime mover, a time-delay feature permitting a minimum _______________ setting shall be provided to avoid retransfer in case of short-time reestablishment of the normal source.
Question 73 of 100
Legally required standby system wiring shall be permitted to occupy _______________ raceways, cables, boxes, and cabinets with other general wiring.
Question 74 of 100
There is a set of 3 overhead 7200V conductors supported on a solidly grounded messenger wire that runs over the pool, and over the diving platform. What is the minimum clearance these conductors must be from the diving platform?
Question 75 of 100
The short-circuit and ground-fault protection for a hermetic motor-compressor shall have a rating NOT exceeding _______________ of the motor-compressor rated-load current.
Question 76 of 100
In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall be permitted to _______________ Class I, Division 2 locations.
Question 77 of 100
The radius of the curve of the inner edge of any bend of Type SE cable, during or after installation, shall not be less than _______________ the diameter of the cable.
Question 78 of 100
A 3-phase 240V service fed with 2/0 aluminum conductors shall have a minimum size main bonding jumper of what size?
Question 79 of 100
A receptacle outlet is not required at one- and two-family dwellings for the service of _______________.
Question 80 of 100
Conductors that supply one or more resistance welders shall be protected by an overcurrent device rated or set at not more than _______________ of the conductor ampacity.
Question 81 of 100
In a building in which critical operations power systems (COPS) are present with other types of power systems described in other sections in this article, the cover plates for the receptacles or the receptacles themselves supplied from the COPS shall __________.
Question 82 of 100
Low-voltage suspended ceiling power distribution systems shall be permanently connected and shall be permitted for listed utilization equipment capable of operation at a maximum of __________.
Question 83 of 100
Where the AHJ can satisfactorily determine that flammable liquids having a flash point below _______________ , will not be handled, such location shall not be required to be classified.
Question 84 of 100
Electrical service and feeders shall be calculated on the basis of not less than _______________ per electrified truck parking space.
Question 85 of 100
Where ________________ service disconnecting means in separate enclosures are grouped at one location and supply separate loads from one service drop, one set of service-entrance conductors shall be permitted to supply each or several such service equipment enclosures.
Question 86 of 100
Metallic structures of battery support systems shall be provided with _________ support members for the cells, or shall be constructed with a continuous insulating material.
Question 87 of 100
Where insulated conductors 4 AWG or larger are pulled straight through a multioutlet assembly, the distance between raceway and cable entries enclosing the same conductor shall not be less than ________.
Question 88 of 100
Each patient bed location shall be supplied by at least two branch circuits, one from the ________ and one from the normal system. All branch circuits from the normal system shall originate in the same panelboard.
Question 89 of 100
The minimum bending radius for 1 inch nonmetallic underground conduit with conductors shall be no less than _________.
Question 90 of 100
No conductor larger than _________ shall be installed, except by special permission, in Cellular Metal Floor Raceways
Question 91 of 100
Where multimotor and combination-load equipment is installed outdoors on a roof, an equipment grounding conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use _______________.
Question 92 of 100
Where structural reinforcing steel is not available or encapsulated in a nonconductive compound, a copper conductor(s) shall be utilized where all of the following requirements are met, except:
Question 93 of 100
A Class II or Class III, Division 1 or Division 2 location shall be permitted to be reclassified as a Zone 20, Zone 21, or Zone 22 location, provided that all of the space that is classified because of a single combustible dust or ignitable fiber/flying source is _______________ under the requirements of this article.
Question 94 of 100
Where Type PVC conduit, Type RTRC conduit, or cable with a nonmetallic sheath is used, an _______________ shall be included to provide for electrical continuity of the raceway system and for grounding of non–current- carrying metal parts.
Question 95 of 100
22AWG control circuit conductors with 75°C insulation in a 30°C ambient environment shall have a maximum ampacity of _______ for permanent amusement attractions.
Question 96 of 100
The capacity of the stand-alone supply shall be equal to or greater than the load posed by the _______________ utilization equipment(s) connected to the stand-alone system.
Question 97 of 100
The ampacity of the supply conductors for a resistance welder that may be operated at different times at different values of primary current or duty cycle shall not be less than _______________of the rated primary current for seam and automatically fed welders, and _______________of the rated primary current for manually operated nonautomatic welders.
Question 98 of 100
On switchgear and control panels exceeding _______________in width, there shall be one entrance at each end of the equipment.
Question 99 of 100
Type MV cable terminated in equipment shall be secured and supported at intervals not exceeding _______________from terminations or a maximum of _______________between supports.
Question 100 of 100
In agricultural buildings the bonding conductor used for equipotential planes shall be solid copper, insulated, covered or bare, and not smaller than _______________.
