Test 4
Ground-fault circuit-interrupter protection for personnel in a dwelling shall be provided for which of the following locations? 1. Bathrooms 2. Dining room 3. Living room 4. Bedrooms
1. Bathrooms
Ground-fault circuit-interrupter protection for personnel in a dwelling shall be provided for which or the following locations? 1. Bathrooms 2. Dining room 3. Living room 4. Bedrooms
1. Bathrooms
What is the minimum thickness for a stainless steel face plate? 1. .030 inches 2. .040 inches 3. .230 inches 4. 303 inches
1. .030 inches
Excluding exceptions, in both exposed and concealed locations, where a cable or raceway-type wiring method is installed PARALLEL to framing members such as joists, rafters, or studs so that the nearest outside surface of the cable is how many inches from the nearest edge of the framing member? 1. 1 1/4 inch. 2. 1 1/8 inch. 3. 1 1/16 inch. 4. 1 inch.
1. 1 1/4 inch.
Equipment intended to be operated and maintained as an integral part of a power production source shall not be required to have a disconnecting means if it exceeds 1. 1,000 volts. 2. 600 volts. 3. 250 volts. 4. 150 volts.
1. 1,000 volts.
Conductors shall be permitted to be tapped, without overcurrent protection, to a feeder if the manufacturing building over 35 feet high, but must remain a maximum length for the unprotected feeder tap of HOW MANY feet? 1. 100 feet. 2. 30 feet. 3. 25 feet. 4. 10 feet.
1. 100 feet
Which NEC article would an electrician refer to for information specifically about grounding? 1. 250 2. 342 3. 378 4. 392
1. 250
The NEC defines a Continuous Load as a load where the maximum current is expected to continue for HOW MANY hours or more? 1. 3 hour 2. 2 hours 3. 1 hours 4. 1/2 hour
1. 3 hour
Transformers shall be protected from overcurrent in accordance with NEC section 450. Therefore, what is the maximum primary only protection rating of the overcurrent protection for a transformer rated 1000-volts or less, if the primary ampacity current is 1.75 amperes? 1. 300 2. 250 3. 125 4. not required
1. 300
Excluding any exceptions, branch circuit conductors supplying household ranges and cooking appliances rated at 8,750 Watts or more shall have a minimum branch circuit rating of least how many amperes? 1. 40 amperes. 2. 45 amperes. 3. 55 amperes. 4. 65 amperes.
1. 40 amperes.
The demand percentage used to calculate 45 receptacles in a boat yard feeder is 1. 50% 2. 70% 3. 80 % 4. 90%
1. 50%
Luminaires and lampholders shall be securely supported. A luminaire that weighs more than HOW MANY pounds or exceeds 16 inches in any dimension shall NOT be supported by the screw shell of a lampholder? 1. 6 2. 50 3. 70 4. 100
1. 6
A transformer service uses 1/0 AWG conductors, what would be the required grounding electrode size? 1. 6 Awg 2. 3 Awg 3. 1/0 Awg 4. 2/0 Awg
1. 6 AWG
Where installed in raceways, conductors WHAT SIZE and larger, not specifically permitted or required elsewhere in The NEC to be solid, shall be stranded. 1. 8 AWG 2. 10 AWG 3. 12 AWG 4. 14 AWG
1. 8 AWG
The size and rating of underground service lateral conductors shall have sufficient ampacity to carry the current for the load/s, and the service conductor minimum size shall not be smaller than WHAT SIZE or 6 AWG aluminum wire? 1. 8 AWG copper 2. 6 AWG copper 3. 4 AWG copper 4. 3 AWG copper
1. 8 AWG copper
Temporary electrical power and lighting installations shall be permitted for a period not to exceed how many days for holiday decorative lighting and similar purposes? 1. 90 2. 120 3. 180 4. 365
1. 90
Which of the following can have a maximum of 9 # 12 wires entering a metal box? 1. A 4-inch square, 1-1/2 inch deep box 2. A 3-inch rectangular, 2-inch deep box 3. A 3 1/2-inch square box with cable clamps and a duplex receptacle 4. A 4-inch square box with a ground wire
1. A 4-inch square, 1-1/2 inch deep box
Inverse time (as applied to the circuit breakers): A qualifying term indicating that there is purposely introduced a delay in the tripping action of the circuit breaker, which delay decreases as the magnitude of the current? 1. increases. 2. decreases 3. extends. 4. inverts.
1. Increases
What is the term used for equipment or materials to which a symbol, or other identifying mark of an organization that is acceptable to the authority having jurisdiction? 1. Labeled. 2. Listed. 3. Rated. 4. Approved.
1. Labeled.
Which of the following describes the service point? 1. The connection between the servicing utility and the premises wiring. 2. The line lugs of the meter socket. 3. The connection between the service-entrance cable and the meter socket. 4. The connection between the service cable and the service disconnect.
1. The connection between the servicing utility and the premises wiring.
High impedance grounded neutral systems in which a grounding impedance, usually a resistor, limits the ground fault current to a low value shall be permitted for which of the following? 1. three-phase 480 volt. 2. three-phase 480/240 volt. 3. three-phase 120/208 volt. 4. single-phase 120/240 volt.
1. Three-phase 480 volt
In every dwelling or residential unit, one or more receptacle outlets shall be installed in restrooms within three feet of the outside edge of each 1. basin. 2. tub. 3. door. 4. water closet.
1. basin.
Other than listed factory assemblies, individual fuses, circuit breakers, or combinations thereof shall not be 1. connected in parallel 2. connected in series 3. used in motor protection applications 4. used in 600-volt applications
1. connected in parallel
A bonding conductor or jumper is a reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected. This bonding conductor or jumper shall be made to be which of the following? 1. continuous 2. supported 3. secure 4. durable
1. continuous
The NEC requires protection for personnel in dwellings and other commercial establishments such as a high school locker room with a shower facility, to have ______ 1. ground-fault circuit interrupter protection. 2. arc-fault circuit interrupter protection. 3. outlets be installed with an isolated grounding conductor. 4. a solid earth ground system.
1. ground-fault circuit interrupter protection.
In both exposed and concealed locations, where a cable or raceway type wiring method is installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than how many inches from the nearest edge of wood? 1. 1 inch. 2. 1 1/4 inch. 3. 1 1/8 inch. 4. 1 1/16 inch.
2. 1 1/4 inch.
In each dwelling unit, the service load calculation must include HOW MANY volt-amperes (watts) for each the two single phase small appliance branch circuits. 1. 500 volt-amperes 2. 1,500 volt-amperes 3. 3,000 volt-amperes 4. 4,500 volt-amperes
2. 1,500 volt-amperes
For permanently connected appliances rated at not over 300 volt amperes or HOW MANY horse power, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means. 1. 1/16 HP 2. 1/8 HP 3. 3/8 HP 4. 5/8 HP
2. 1/8 HP
A receptacle is required if a hallway in a dwelling unit is at least how long? 1. 12 feet 2. 10 feet 3. 8 feet 4. 6 feet
2. 10 feet
A dwelling unit has a computed load of 8.5 kVA. The minimum size of the service disconnecting means is 1. 150 amperes 2. 100 amperes 3. 60 amperes 4. 35 amperes
2. 100 amperes
Plug fuses and fuse holders shall not be used in circuits exceeding how many volts between conductors? 1. 110 volts. 2. 125-volts. 3. 250 volts. 4. 600 volts.
2. 125-volts.
Overcurrent protection of a single non motor operated appliance shall not exceed 20 amperes if the appliance is rated at 1. 12.3 amperes or less. 2. 13.3 amperes or less. 3. 14.3 amperes or less. 4. 15.3 amperes or less.
2. 13.3 amperes or less.
Fixture wires shall NOT be smaller than 1. 20 AWG. 2. 18 AWG. 3. 16 AWG. 4. 14 AWG.
2. 18 AWG.
What is the calculated service load for a commercial kitchen containing a 12 kW range, 8 kW dishwasher, and a 2 kW mixer? 1. 19.8 kW. 2. 20 kW. 3. 22 kW 4. 24 kW.
2. 20 kw.
Where conduit or tubing nipples having a maximum length not to exceed HOW MANY inches are installed between boxes, cabinets, and similar enclosures, the nipples shall be permitted to be filled to 60 percent of their total cross-sectional area? 1. 12 inches. 2. 24 inches. 3. 36 inches. 4. 42 inches.
2. 24 inches.
Grounding is covered in which article of the NEC? 1. 220 2. 250 3. 344 4. 376
2. 250
Electrical nonmetallic tubing shall be secured within how many feet of each outlet box? 1. 4.0 feet. 2. 3.0 feet. 3. 1.5 feet 4. 1.0 foot.
2. 3.0 feet
Where separate electrodes used a bonding jumper not smaller than which size copper or equivalent shall be connected between the communications grounding electrode and power grounding electrode system at the building or structure served? 1. 10 AWG copper 2. 6 AWG copper 3. 4 AWG copper 4. 2 AWG copper
2. 6 AWG copper
For MC multi-conductor or multiplexed single conductor cables having individually shielded conductors, the minimum bending radius is 12 times the diameter of the individually shielded conductors or 1. 8 times the overall diameter, whichever is greater 2. 7 times the overall diameter, whichever is greater 3. 6 times the overall diameter, whichever is greater 4. 5 times the overall diameter, whichever is greater
2. 7 times the overall diameter, whichever is greater
Overhead service conductors (for services not over 1000 volts) shall NOT be readily accessible and shall have a vertical clearance of not less than HOW MANY feet above the roof surface? 1. 4 feet. 2. 8 feet. 3. 12 feet. 4. 15 feet.
2. 8 feet.
In straight pulls, the length of the box shall not be less than 8 times the trade size of the largest raceway. Therefore, if the run uses a 1-inch conduit that contains number 6 AWG conductors, what minimum length pull box is required? 1. 6 inches. 2. 8 inches. 3. 16 inches. 4. 32 inches.
2. 8 inches.
In an information technology equipment room, all exposed non-current-carrying metal parts of an information technology systems shall be 1. connected to an isolated ground rod 2. bonded to the EGC or be doubled insulated 3. grounded together in a grid 4. labeled as potentially energized
2. Bonded to the EGC or be doubled insulated
In commercial garages where ventilation is not provided and Class liquids are present, the floor area to at height of 18 inches above grade is designated as 1. Class 1, Division 1. 2. Class I, Division II. 3. Class I, Division III. 4. Class II, Division 1.
2. Class I, Division II.
Single phase cord and plug connected room air conditioners shall be provided with what type of factory installed protection that shall be an integral part of the attachment plug or be located in the power supply cord within 300 mm (12in) of the attachment 1. GFCI 2. LCDI 3. GFPE 4. AFPE
2. LCDI
Overcurrent devices installed at the service equipment and intended to interrupt current at fault levels shall have an interrupting rating sufficient for the nominal circuit voltage and the current that is available at the_____ 1. load terminals of the equipment. 2. line terminals of the equipment. 3. interior distribution panels. 4. at the grounding electrode system.
2. Line terminals of the equipment.
Switches, switching devices, and circuit breakers used as switches operating at 1000 volts and below shall not disconnect the _______ conductor of a circuit. 1. ungrounded conductor of the circuit. 2. grounded conductor of the circuit. 3. phase conductor of the circuit. 4. high leg conductor of the circuit.
2. grounded conductor of the circuit.
There shall be no damaged parts that may adversely affect safe operation of 1. external dimensions 2. mechanical strength 3. temperature resistance 4. access for qualified personnel
2. mechanical strength
For a multifamily unit, the required 20 ampere dedicated circuit for the dwelling's bathroom unit shall 1. be added to the general lighting calculation. 2. not be added to the general lighting calculation. 3. have 1,599 VA added to the general lighting calculation. 4. have 20 amperes added to the general lighting calculation.
2. not be added to the general lightning calculation .
In general, main feeders for supplying power to elevators and dumbwaiters shall be installed 1. inside the hoistway. 2. outside the hoistway. 3. in rigid metal conduit or IMC. 4. encased in 2 inches of concrete, minimum.
2. outside the hoistway.
Switches controlling induction and dielectric heating equipment that are operated by foot pressure 1. shall be provided with selector switches 2. shall be provided with shield over the contact button 3. must be protected from unqualified personnel 4. shall be accessible to operator only
2. shall be provided with shield over the contact button
Sensitive electronic equipment operates at 1. single phase 60-volts line-to-line, 30-volts to ground 2. single phase 120-volts line-to-line, 60-volts to ground 3. single phase 240-volts line-to-line, 120-volts to ground 4. three phase 240-volts line-to-line, 120 volts to ground
2. single phase 120-volts line-to-line, 60-volts to ground
As a general rule, what type of fire resistant construction shall a transformer of the dry-type rated at more. than 112 1/2 kVA be installed in? 1. vault 2. transformer room 3. locked 4. readily accessible
2. transformer room
Outdoor temporary service poles shall be constructed of 1. weathertight electrical materials 2. weatherproof electrical materials 3. watertight electrical materials 4. non-flammable electrical materials
2. weatherproof electrical materials
In each dwelling unit, the service load calculation must include HOW MANY volt-amperes (watts) for the one single phase laundry branch circuit. 1. 4,500 volt-amperes 2. 3,000 volt-amperes 3. 1,500 volt-amperes 4. 500 volt-amperes
3. 1,500 volt-amperes
A fastened in place garbage disposal and a portable dishwasher installed in a dwelling unit are supplied by a 20-ampere, 120-volt branch circuit. For both cord-and-plug connected appliances to be supplied by one branch circuit, the nameplate rating of the garbage disposal shall NOT exceed 1. 20 amperes. 2. 15 amperes. 3. 10 amperes. 4. 8 amperes.
3. 10 amperes.
Mobile home service equipment shall be rated at not less than HOW MANY amperes at 120/240 volts, and provisions shall be made for connecting a mobile home feeder assembly by a permanent wiring method. 1. 50 amperes 2. 60 amperes 3. 100 amperes 4. 125 amperes
3. 100 amperes
Using Ohm's Law (or the Power Wheel if available), what would be the calculated current draw of a single-phase 240 volt rated motor that has a nameplate rating load of 3,800 Watts? 1. 27.42 amperes 2. 31.66 amperes 3. 15.83 amperes 4. 9.14 amperes
3. 15.83 amperes
What would be the calculated minimum conductor ampacity for a continuous duty, single phase, 120 volt, 3/4 horse power swimming pool pump motor? 1. 15 amperes 2. 16 amperes 3. 17 amperes 4. 18 amperes
3. 17 amperes
When used outside (subject to corrosive conditions), aluminum or copper-clad aluminum grounding conductors shall not be installed or terminated within how many inches of the earth? 1. 36 2. 24 3. 18 4. 12
3. 18
In a dwelling, a receptacle outlet installed in the floor may be counted as a required outlet for receptacle wall spacing requirements if it is located a maximum of how many inches from the wall? 1.6 inches 2. 12 inches 3. 18 inches 4. 24 inches
3. 18 inches
According to the National Electrical Code section 240.4, what is the maximum sized overcurrent protection device that can normally be used with a number 12 AWG, 90-degree C temperature, THHN insulated copper conductor? 1. 12 amperes. 2. 15 amperes. 3. 20 amperes. 4. 25 amperes.
3. 20 amperes.
When calculating the load on a feeder circuit with multiple motors, what percentage of the largest motor must be added to the total load? In other words, if you sum ALL the motors FLC ratings, how much additional ampacity of the largest motor must be added (plus) to the sub total? 1. 125% 2. 100% 3. 25% 4. 0%
3. 25%
For incandescent filament lamps, pendant conductors shall be twisted together, where not cabled in a listed assembly, when longer than 1. 2.0 feet 2. 2.5 feet 3. 3.0 feet 4. 3.5 feet
3. 3.0 feet
With a typical 120/240 V, 3 phase, 4 wire Delta with a highã "leg configuration. What is the working space required, given that there are exposed live parts on one side and grounded parts on the other side? The voltage to ground is 208-volts. 1. 4.5 feet 2. 4.0 feet 3. 3.5 feet 4. 3.0 feet
3. 3.5 feet
What would be the MINIMUM direct burial depth requirement for irrigation and landscaping lighting systems that have a source voltage of 24 volts, if no specific location on the property has been determined? 1. 18 inches. 2. 12 inches. 3. 6 inches. 4. 2 inches.
3. 6 inches
A dwelling unit receptacle outlet shall not be located more than HOW MANY feet above the balcony, deck, or porch walking surface. 1. 5-1/2 feet. 2. 6 feet. 3. 6-1/2 feet. 4. 7 feet.
3. 6-1/2 feet.
The circular mil area of a # 12 conductor is __________. 1. 10380 2. 26240 3. 6530 4. 6350
3. 6350
Provided all applicable conductors are met a single 16 AWG copper conductor can be used on continuous loads that do not exceed 1. 6 amperes 2. 7 amperes 3. 8 amperes 4. 10 amperes
3. 8 amperes
Cleat type lampholders shall be permitted to have exposed terminals if they are located at least how many feet above the floor? 1. 12.0 feet. 2. 10.0 feet. 3. 8.0 feet. 4. 6.5 feet.
3. 8.0 feet.
When used in a nursing home, emergency lighting batteries are required to have how much back-up time? 1. 45 minutes 2. 60 minutes 3. 90 minutes 4. 120 minutes.
3. 90 minutes
The NEC defines a bathroom as an area with a basin and one or more of the following: a toilet, a urinal, a tub, a shower, a bidet, or similar plumbing fixtures. Therefore, which of the following is considered a bathroom? 1. A room with a toilet and shower 2. A room with a urinal and tub. 3. A room with a basin and toilet 4. A room with a shower and bidet
3. A room with a basin and toilet
Electrical appliances used in any occupancy, such as gas fired central heating equipment (other than fixed electric space-heating equipment) shall be supplied by which of the following? 1. multi-wire branch circuit 2. small appliance branch circuit 3. an individual branch circuit 4. multi-purpose feeder circuit
3. An individual branch circuit
The minimum number of branch circuits shall be determined from the total 1. rated load 2. connected load 3. calculated load 4. defined load
3. Calculated load
When of adequate capacity, the alternate power source (emergency generator) is permitted to supply the 1. emergency system only 2. emergency and legally required standby systems only 3. emergency, legally required standby, and optional standby systems 4. emergency, legally required standby, and ventilation systems only
3. emergency, legally required standby, and optional standby systems
Where an equipment grounding conductor is run with the feeder or current from a first building to a separate building, the equipment grounding conductor size is based upon the ampere rating of the overcurrent protective device 1. on the line side of the feeder or circuit 2. in the transformer, the feeder or circuit 3. on the load side of the feeder of circuit 4. in the service disconnect of the feeder or circuit
3. on the load side of the feeder of circuit
Readily accessible is defined as capable of being reached quickly for 1. removal, renewal, or inspections, without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders. 2. disconnect, renewal, or inspections, without requiring those to whom ready access is requisite to climb over or remove obstacles to resort to portable ladders. 3. operation, renewal, or inspections, without requiring those to whom ready access is requisite to climb over or remove obstacles or resort to portable ladders. 4. maintenance, renewal, or inspections, without requiring those to whom ready access is requisite to climb over or remove obstacles or resort to portable ladders.
3. operation, renewal, or inspections, without requiring those to whom ready access is requisite to climb over or remove obstacles or resort to portable ladders.
Emergency system equipment shall be suitable for the maximum available fault current at its terminals, and shall have adequate capacity and rating for all loads to be operated which of the following? 1. independently 2. manually 3. simultaneously 4. with battery
3. simultaneously
In an incandescent fixture, the white wire should be connected to______? 1. the gold screw 2. the green screw 3. the screw shell 4. the black screw
3. the screw shell
In guest rooms of hotels and motels, receptacle outlets shall be permitted to be located conveniently for permanent furniture layout shall be readily accessible, and have at least 1. four receptacles 2. three receptacles 3. two receptacles 4. one receptacle
3. two receptacles
Metal covers shall be of the same material as the box or conduit body with which they are used, or they shall be lined with firmly attached insulating material that is not less than 1. 1/2 inch 2. 1/4 inch 3. 1/8 inch 4. 1/32 inch
4. 1/32 inch
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. 25 or more persons 2. 60 or more persons 3. 80 or more persons 4. 100 or more persons
4. 100 or more persons
Manhole covers shall be designed to require the use of tools to open or otherwise be over 1. 25 pounds 2. 50 pounds 3. 75 pounds 4. 100 pounds
4. 100 pounds
A receptacle supplying power shall be on a separate circuit serving office furnishing panels and no other loads and shall be located not more than how many inches from the partition that is connected to it? 1. 96 inches 2. 72 inches 3. 24 inches 4. 12 inches
4. 12 inches
Which of the following is not a common service voltage in the United States? 1. 120/240 single phase 2. 120/208, three-phase, three wire 3. 277/480, 3-phase, 4 wire 4. 120/270, single phase, two wire
4. 120/270, single phase, two wire
In Class I, Division 1 location, PVC shall be permitted where encased in a concrete envelope, a minimum of how many inches thick and provided with not less than how many inches of cover measured from the top of the conduit to grade? 1. 6 inches, 24 inches 2. 6 inches, 6 inches 3. 4 inches, 24 inches. 4. 2 inches, 24 inches
4. 2 inches, 24 inches
If a parallel set of 600 kcmil conductors are installed separate raceways, and these circuits are protected with 1200 ampere overcurrent fuses, what would be the minimum size of the equipment grounding conductors used for this installation? 1. 8 AWG 2. 4 AWG 3. 1 AWG 4. 3/0 AWG
4. 3/0 AWG
An HP rated motor controller is to be installed on a 400-volt delta connected, corner grounded, three phase circuit phase circuit. Which of the following voltage ratings would be approved for this use? 1. 120/240 2. 480/277 3. 240 volts 4. 480 volts
4. 480 volts
Rigid polyvinyl chloride conduit (PVC) shall not be used where subject to ambient temperatures in excess of 1. 90 degrees C, unless listed otherwise 2. 75 degrees C, unless listed otherwise 3. 60 degrees C, unless listed otherwise 4. 50 degrees C, unless listed otherwise
4. 50 degrees C, unless listed otherwise
AFCI protection, where required shall be provided where a dwelling occupancy branch circuit to a fire alarm system, installed in accordance with Article 760 is installed using 1. Rigid Metal Conduit 2. Intermediate Metal Tubing 3. Electrical Metallic Tubing 4. Type MC cable
4. Type MC cable
Underground feeder and branch circuit cable, Type UF, is allowed for use in which of the following locations? 1. In theaters and similar locations 2. In motion picture studios 3. In storage battery rooms 4. Underground, including direct burial in the earth.
4. Underground, including direct burial in the earth.
Underground feeder and branch circuit cable, Type UF, is allowed for use in which of the following locations? 1. In theaters and similar locations 2. In motion picture studios 3. In storage battery rooms 4. Underground, including direct burial in the earth.
4. Underground, including direct burial in the earth.
Per the NEC, a switchboard, switchgear, or panelboard containing a 4-wire, delta-connected system where the midpoint (high-leg) of one phase winding is grounded shall be legibly and permanently as? 1. field marked by color only 2. factory marked identifying the phase and voltage 3. field marked identifying voltage only 4. field marked identifying the phase and voltage to ground
4. field marked identifying the phase and voltage to ground
All 15 and 20-ampere, single phase, 125-volt receptacles located within 20 feet of the inside walls of a pool shall be protected by which of the following? 1. weather resistant protection. 2. ground-fault protection of equipment. 3. arc-fault circuit protection. 4. ground-fault circuit interrupter protection.
4. ground-fault circuit interrupter protection.
The purpose of the National Electrical Code is to 1. standardize the products 2. establish design specifications 3. standardize the installation 4. safeguard persons and property
4. safeguard persons and property
Separately derived systems used for emergency, required standby or optional standby power, shall have all conductors including a neutral switched by a 1. double pole 2. single pole 3. back fed device 4. transfer switch
4. transfer switch
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 rating of a cord-and-attachment-plug-connected room air conditioner shall not exceed HOW MANY amperes, if the unit is connected to a single receptacle on an individual branch circuit, rated at 30 amperes? 1. 24.0 amperes 2. 30.0 amperes 3. 37.5 amperes 4. 40.0 amperes
1. 24.0 amperes
Without a location specified, what would be the required direct burial depth of RMC installed outside? 1. 6 inches of cover. 2. 8 inches of cover. 3. 12 inches of cover. 4. 24 inches of cover.
1. 6 inches of cover.
Where there are no space limitations, underground wiring not necessary to supply pool equipment shall not be permitted under the pool or the area extending 1. 3 feet horizontally from the inside wall of the pool 2. 5 feet horizontally from the inside wall of the pool 3. 6 feet horizontally from the inside wall of the pool 4. 10 feet horizontally from the inside wall of the pool
2. 5 feet horizontally from the inside wall of the pool
Conductors for branch circuits shall be sized to prevent a voltage drop not to exceed 3 % at the farthest outlet. However, what is the maximum voltage drop allowable for BOTH the branch and feeder circuits combined? 1. 3 percent 2. 5 percent 3. 8 percent 4. 10 percent
2. 5 percent
Where a permanently installed pool is installed at a dwelling unit, at least one 125-volt convenience receptacle shall be located a minimum of how many feet from the inside wall of the pool? 1. 10 feet. 2. 6 feet. 2. 3. 5 feet. 4. 3 feet.
2. 6 feet.
A hot tub is installed inside a dwelling unit. There shall be a GFCI protected receptacle installed within 1. 5 to 20 feet 2. 6 to 10 feet 3. 10 to 15 feet 4. 10 to 20 feet
2. 6 to 10 feet
If a feeder was rated to carry a range of 61 to 100 amperes of current, what would be the required size of the copper equipment grounding conductor for the circuit? 1. 4 AWG 2. 8 AWG 3. 10 AWG 4. 12 AWG
2. 8 AWG
Where combination surface metal raceways are used both for signaling and for lighting and power circuits, the different systems shall be run in separate compartments identified by 1. tagging. 2. color coding. 3. numbering. 4. placard.
2. color coding.
The disconnecting means for receptacles of Transport Refrigerated Units (TRUS) shall be readily accessible, and located not more than______ from the receptacle it controls, and located in the supply circuit ahead of the receptacle. 1. 18 inches. 2. 24 inches. 3. 30 inches. 4. 32 inches.
3. 30 inches.
What would be the derated value for a # 8 AWG conductor (insulated with THHN) given that the conductor is to be run through a raceway at an ambient temperature of 40 degrees C? This conductor is only one, of a total of six current carrying conductors in that raceway. Assume that the equipment at both ends is rated for 75 degrees C terminations. 1. 55 amperes 2. 40 amperes 3. 35 amperes 4. 25 amperes
3. 35 amperes
The tables in Article 400 provide the ampacities for flexible cords and cables with not more than three current-carrying conductors. Given that the installation uses an SRD multi-conductor cable sized at 8 AWG, where only 2 conductors are current carrying to the utilization equipment, what is the allowable ampacity? 1. 20 amperes. 2. 30 amperes. 3. 40 amperes. 4. 50 amperes.
3. 40 amperes.
Which article prevents a control switch for emergency lighting in a theater or a place of assembly being placed in a motion picture projection booth or on a stage or platform? 1. 410 2. 518 3. 520 14. 700
3. 520
A 2-inch schedule 40 PVC conduit is run horizontally from the side of a panelboard for 40 feet, which then turns vertically for 35 feet where it enters the building through an LB. How many expansion fittings would be required? 1. 2 2. 5 3. 10 4. 15
1. 2
Where an internal combustion engine is used as the prime mover for an emergency generator system, an on premise fuel supply lasting at least 1. 2 hours at full demand is required. 2. 3 hours at full demand is required. 3. 4 hours at full demand is required. 4. 5 hours at full demand is required.
1. 2 hours at full demand is required.
Direct-buried conductors and cables emerging from grade, shall be protected by enclosures or raceways extending from the minimum cover distance below grade to a point at least HOW MANY feet above finished grade? 1. 8 feet. 2. 5 feet. 3. 4 feet. 4. 2 feet.
1. 8 feet
The load for household electric clothes dryers in dwelling units shall be either 5,000 watts or the nameplate rating, whichever is larger, for each dryer served. However, if the household has five dryers, what would be the demand factor applied for the service load calculation. 1. 85% 2. 75% 3. 65% 4. 60%
1. 85%
When not LCDI-protected, a single phase cord-and-plug connected room air conditioner will REQUIRE 1. AFCI protection. 2. GFCI protection. 3. GFPE protection. 4. OCPD protection.
1. AFCI protection.
If the current rating of the OCP is tripping the overloads, the selection of overload device can be adjusted to a maximum of how many amperes based on the following circuit and load conditions? - 230-volt motor, -nameplate FLA of 18 amperes, temperature rise of 40 degrees C, service factor of 1.15, - the tripping overloads are currently set to 22.5 amperes. 1. 18.0 amperes. 2. 20.7 amperes. 3. 22.5 amperes. 4. 25.2 amperes.
4. 25.2 amperes
Pull and junction boxes and hand-hole enclosures shall provide approved space and dimensions for the installation of conductors. For straight pulls, the length of the box shall not be less than HOW MANY times the outside diameter, over sheath, of the largest shielded or lead-covered conductor or cable entering the box. 1. 6 times 2. 8 times 3. 16 times 4. 48 times
4. 48 times
Standard lamp holders operating at 50-volts or less must have a rating of not less than 1. 150 watts 2. 200 watts 3. 500 watts 4. 660 watts
4. 660 watts
Using the Tables of Chapter 9 of the NEC, what would be the required size if the raceway is Schedule 40 PVC underground with Schedule 80 stub-ups, and it contains only the four 4 AWG THWN conductors? 1. 1/2 2. 3/4 3. 1 4. 1-1/4
4. 1-1/4
How tall must a box be given it has four parallel 2-inch raceways entering the bottom and four 2-inch raceways entering the back of the box? 1. 18 inches x 18 inches 2. 14 inches x 14 inches 3. 10 inches x 10 inches 4. 8 inches x 8 inches
1. 18 inches x 18 inches
What would be the minimum size box required given that a 3 inches Electrical Metallic Tubing enters the bottom, and a 3 inches Flexible Metallic Raceway enters the side of the box? 1. 18 inches x 18 inches 2. 12 inches x 12 inches 3. 8 inches x 8 inches 4. 6 inches x 6 inches
1. 18 inches x 18 inches
What is the maximum dual element fuse that can be used (for both short-circuit-ground-fault protection and for overload protection) given a load of: - 115-volt, single-phase, 2-HP motor, - Temperature rise of the motor is 40 degrees C, - Service factor is 1.15. 1. 30 amperes. 2. 20 amperes. 3. 15 amperes. 4. 10 amperes.
1. 30 amperes.
What would be the calculated minimum circuit rating given that the nameplate on a single-phase electric range shows 240 volts, and 8,000 Watts? 1. 33.33 amperes. 2. 30.00 amperes. 3. 25.00 amperes. 4. 20.00 amperes.
1. 33.33 amperes
Given a terminal rating of 60 degrees C, feeders to a panelboard are 6 AWG THHN conductors. The maximum size overcurrent protection for these conductors is 1. 60 amperes. 2. 70 amperes. 3. 80 amperes. 4. 100 amperes.
1. 60 amperes.
No grounded conductor shall be attached to any terminal or lead so as to 1. reverse designated polarity 2. be inaccessible to qualified personnel 3. require repairs 4. connect to a raceway
1. Reverse designated polarity
The voltage from the grounded conductor to the high leg, in a high leg delta three phase four-wire 240/120 system, is how many volts? 1. 120 2. 208 3. 240 4. 277
2. 208
Given an industrial building, what would be the total load with the following loads: - multi-outlet assemblies with continuous runs of 13 feet, 25 feet, and 6 feet (non-simultaneous use) - multi-outlet assemblies with continuous runs of 41 feet, 28 feet, 19 feet, and 24 feet (simultaneous use) 1. 20,160 2. 21,960 3. 22,340 4. 23,580
2. 21,960
According to the NEC, a written assured equipment grounding conductor program, would call for grounding tests on construction sites be performed at intervals not exceeding HOW MANY months? 1.4 2. 3 3. 2 4. 1
2. 3
Lighting track shall be securely mounted, and unless identified for supports at greater intervals, a single section of 4 feet or shorter in length shall have two supports. However, if the 4-foot length was made up of two (2) sections, how many total supports would be required for this installation? 1. 2 2. 3 3. 4 4. 6
2. 3
Luminaires, lamp-holders, and lamps clearance and installation would call for the thermal insulation not be installed above a recessed luminaire or within HOW MANY inches of the recessed luminaire enclosure, wiring compartment, ballast, transformer, LED driver, or power supply unless the luminaire is identified Type IC for insulation contact? 1. 1 inches. 2. 3 inches. 3. 12 inches. 4. 18 inches.
2. 3 inches.
No luminaires shall be installed for operation on supply circuits over 150-volts between conductors. Submersible pumps and other submersible equipment shall operate at HOW MANY volts or less between conductors? 1. 240 volts 2. 300 volts 3. 480 volts 4. 600 volts
2. 300 volts
When doing a load calculation of a recreational vehicle park, sites with both 20 and 30 ampere supply facilities are calculated at 1. 4800 volt-amperes per site 2. 3600 volt-amperes per site 3. 2400 volt-amperes per site 4. 1800 volt-amperes per site
2. 3600 volt-amperes per site
The receptacle outlets required in dwelling units shall be in addition to any receptacle that is part of any luminaire or appliance, located within cabinets or cupboards or located more than how many feet above the floor? 1. 5.0 feet. 2. 5.5 feet. 3. 6.0 feet. 4. 6.5 feet.
2. 5.5 feet
Swimming pool associated motors shall be connected to an equipment grounding conductor not smaller than 1. 12 AWG. 2. 8 AWG solid. 3. 8 AWG insulated. 4. 6 AWG.
2. 8 AWG solid.
Lighting equipment shall be listed and identified for use with office furnishings and shall have a means for secure attachment. The cord and plug connection shall be suitable for the intended application but shall not exceed HOW MANY feet in length? 1. 10 feet 2. 9 feet 3. 8 feet 4. 6 feet
2. 9 feet
Which statement below regarding a delta type 3 phase transformer connection is correct? 1. IL equals IP 2. EL equals EP 3. IL equals 3 times IP 4. EL equals 3 times EP
2. EL equals EP
The cable covering on those electrical circuits and parts of electrically operated pipe organs; the cable shall be provided with an outer covering, either overall or on which of the following? 1. Conductors that not grouped 2. Each subassembly of grouped conductors 3. Ungrounded conductors 4. Grounded conductors
2. Each subassembly of grouped conductos
When equipment grounding conductors are installed in non-service panelboards, what is required for the proper termination of the equipment grounding conductors? 1.Isolated terminal bar. 2. Grounding terminal bar. 3. Neutral bar. 4. Lug terminal bar.
2. Grounding terminal bar.
Emergency lighting is most likely to include 1. illuminated business signs. 2. illuminated exit signs. 3. outline lighting. 4. window lighting.
2. Illuminated exit signs.
Where equipment rated 800 A or more that contains overcurrent devices, switching devices, or control devices is installed and there is a personnel door(s) intended for entrance to and egress from the working space less than 25 feet from the nearest edge of the working space, the door(s) shall open and be equipped with listed panic hardware. 1. away from the direction of egress 2. in the direction of egress 3. in front of switchboard 4. beside the switchboard
2. In the direction of egress
All 120-volt, single phase, 15- and 20-ampere outlet installed in a dwelling unit shall be protected by a listed arc-fault circuit interrupter, combination type, installed to provide protection of the branch circuit except for those installed in 1. closets. 2. kitchens. 3. hallways. 4. sunrooms.
2. Kitchens.
The disconnecting means for fixed electric space heating equipment without supplementary overcurrent protection, with motors not over 1/8 HP ______ 1. shall be located within sight of the equipment. 2. may be located out of sight if the equipment if lockable 3. shall be adjacent to the equipment. 4. shall disconnect only one equipment unit.
2. May be located out of sight if the equipment is lockable.
When guarding the back of a stage switchboard with exposed live parts, what is NOT required by the NEC? 1. Enclosure by the building walls 2. Non-flammable curtains 3. Wire mesh grilles 4. Other approved methods
2. Non-flammable curtains
If a dwelling has a 10,000 Watt electric range and a service of 120/240 volts, what NM cable would be required? 1. Number 6-3 with ground. 2. Number 8-3 with ground. 3. Number 10-3 with ground. 4. Number 12-3 with ground.
2. Number 8-3 with ground.
Intermittent operation in which the load conditions are regularly recurrent, is the definition of which of the following? 1. varying duty 2. periodic duty 3. short duty 4. intermittent duty
2. Periodic duty
Type MI mineral insulated, metal-sheathed cable is a factory assembly of one or more conductors enclosed in a liquid-tight and gas tight continuous copper or alloy steel sheath and insulated with a highly compressed 1. outer mineral insulation. 2. refractory mineral insulation. 3. conducting mineral insulation. 4. non conducting mineral insulation.
2. Refractory mineral insulation
The use of type FCC cable shall be permitted for use as branch circuit conductors on 1. outdoor installations 2. smooth concrete floor surfaces 3. commercial garage walls 4. health care facility walls.
2. Smooth concrete floor surfaces
Where two or more single phase ranges are supplied by a 3 phase, 4 wire feeder or service, the total load shall be computed on the basis of service or 1. the number of small appliance branch circuits. 2. twice the maximum number connected between any two phases. 3. the optional method. 4. the maximum number connected between any two phases.
2. Twice the maximum number connected between any two phases.
In switchboards and panel boards, a 3-pole circuit breaker or fusible switch shall be considered which the following? 1. as an independent circuit 2. as three overcurrent devices 3. a bi-directional breaker 4. a back fed overcurrent device
2. as three overcurrent devices
Ground fault protection of equipment shall be provided for solidly grounded wye electrical services of more than 150-volts to ground, but not exceeding 600-volts phase to phase for each service disconnecting means rated how many amperes or more? 1. 2,000 amperes. 2. 1,200 amperes. 3. 1,000 amperes. 4. 800 amperes.
3. 1,000 amperes.
What is the size range of aluminum rigid conduit couplings? 1. 1/8 inch to 2 inches 2. 1 inch to 8 inches 3. 1/2 inch to 6 inches 4. 2 inches to 12 inches
3. 1/2 inch to 6 inches
Where nonmetallic sheathed cable (flexible tubing, Type NM) is used to enclose the conductors, the tubing shall extend from the last insulating support to not less than________inside the box and beyond any cable clamp. 1. 1/16 inch 2. 1/8 inch 3. 1/4 inch 4. 1/2 inch
3. 1/4 inch
Optional feeder and service load calculations can be used if the dwelling is served by single-phase, 3-wire, 120/240-volt service or feeder conductors with an ampacity of which of the following? 1. 200 or greater 2. 150 or greater 3. 100 or greater 4. 125 or greater
3. 100 or greater
Tap conductors of a type suitable for the temperature encountered shall be permitted to run from the luminaire terminal connection to an outlet box placed at least how many inches from the fixture? 1. 24 inches 2. 18 inches 3. 12 inches 4. 6 inches
3. 12 inches
In addition to the number of branch circuits required by other parts of this section (two for the small appliance), at least one additional ____ branch circuit of size 12 AWG shall be provided to supply the laundry receptacle outlets. 1. 15 amperes 2. 20 amperes 3. 25 amperes 4. 30 amperes
3. 20 amperes
Neon signs branch circuits that supply neon tubing installations shall not be rated in excess of 30 amperes, however, branch circuits that supply all other signs and outline lighting systems shall be rated not to exceed ______ 1. 40 amperes 2. 30 amperes 3. 20 amperes 4. 15 amperes
3. 20 amperes
Snap switches connected to aluminum conductors shall be listed and marked CO/ALR and rated at no more than how many amperes? 1. 50 amperes. 2. 30 amperes. 3. 20 amperes. 4. 15 amperes.
3. 20 amperes.
There are numerous instances where a higher rated OCPD can be installed on a 12 AWG Cu conductor, such as, motors, welders, x-ray equipment, etc. However, in general, what is the largest OCPD that can be normally used with a 12 AWG, 90 Degree C, THHN copper conductor? 1. 40 amperes. 2. 30 amperes. 3. 20 amperes. 4. 15 amperes.
3. 20 amperes.
Dwelling unit receptacle outlets shall be installed at each wall countertop space that is 12 inches or wider. Furthermore, the receptacle outlets shall be installed so that no point along the wall line is more than HOW MANY inches measured horizontally from a receptacle outlet in that space (in other words, the maximum distance between the outlets)? 1. 48 inches 2. 36 inches 3. 24 inches 4. 12 inches
3. 24 inches
Final spans of feeders or branch circuits to a building they supply, or from which they are fed, shall be permitted to be attached to the building, but they shall be kept not less than from windows that are designed to be opened, and from doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. 1. 1 foot. 2. 2 feet. 3. 3 feet. 4. 5 feet.
3. 3 feet.
Five wet-niche luminaires have a total ballast rating of 7.5 amperes with a total lamp wattage of 320 watts. The total calculated load is 1. 7.5 amperes. 2. 37.5 amperes. 3. 320 watts. 4. 1600 watts.
3. 320 watts.
Mineral-Insulated, Metal-Sheathed Cable, Type MI cable shall be supported and secured by staples, straps, hangers, or similar fittings, designed and installed so as not to damage the cable, at intervals not exceeding HOW MANY feet? 1. 2 feet. 2. 3 feet. 3. 6 feet. 4. 12 feet.
3. 6 feet.
For multi wire circuits that supply temporary lighting, receptacles shall not be connected to the same 1. bonding conductor. 2. grounded conductor. 3. ungrounded conductor. 4. grounding conductor.
3. Ungrounded conductor.
Each recreational vehicle shall have a safety label with the signal word "WARNING". This safety label must have the word WARNING, and the Body Text of the warning a minimum of which of the following character sizes? 1. Warning at least 3/4 in., and Body Text at least 1/2 -in. 2. Warning at least 1/2 in., and Body Text at least 1/4 -in. 3. Warning at least 1/4 in., and Body Text at least 1/8-in. 4. Any legible text size on a contrasting background.
3. Warning at least 1/4 in and body text at least 1/8 - inch
Which device functions as protection of personnel by de-energizing a circuit (or portion thereof) within an established period of time, when a current to ground exceeds the values established for a Class A device? 1. inverse time breaker. 2. dual element fuse. 3. ground fault circuit interrupter. 4. safety switch.
3. ground fault circuit interrupter.
Each disconnecting means shall be legibly marked to indicate its purpose. The markings shall be 1. in letters at least 1/8 inch high. 2. placed on by the manufacturer. 3. of sufficient durability to withstand the environment 4. installed by qualified personnel.
3. of sufficient durability to withstand the environment
Electrical equipment shall be installed in a neat and workmanlike manner. Where metallic plugs or plates are used with nonmetallic enclosures, they shall be recessed at least HOW MANY inches from the outer surface of the box? 1. 3/4 inch 2. 5/8 inch 3. 3/8 inch 4. 1/4 inch
4. 1/4 inch
Information technology equipment and data processing unit branch circuit conductors supplying one or more units shall have an ampacity not less than which of the following? 1. 50 percent of the total connected load 2. 80 percent of the total connected load 3. 100 percent of the total connected load 4. 125 percent of the total connected load
4. 125 percent of the total connected load
According to Ohm's Law, what would be the calculated kilo watt load of an electrical sign that draws 19 amperes of current, operating on a single-phase voltage of 120 VAC? 1. 5.89 kW 2. 4.67 kW 3. 3.45 kW 4. 2.28 kW
4. 2.28 kW
The overcurrent protection interrupting rating shall not be required to be marked on circuit breakers used for supplementary protection. However, every circuit breaker having an interrupting rating other than HOW MANY amperes shall have its interrupting rating shown on the circuit breaker. 1. 1,000 2. 2,000 3. 3,000 4. 5,000
4. 5,000
What is the minimum size permitted by code for the secondary conductors of a 10 kVA single phase 480/240-volt transformer, if the primary is protected with a 25 ampere circuit breaker and the secondary conductors terminate into 60 ampere overcurrent protection? 1. 40 amperes. 2. 45 amperes. 3. 50 amperes. 4. 60 amperes.
4. 60 amperes.
Single conductor open wiring systems shall be considered exposed to physical damage when conductors are installed within how many feet of the floor? 1. 10 feet. 2. 9 feet. 3. 8 feet. 4. 7 feet.
4. 7 feet.
Service entrance conductors for a temporary pole shall NOT be smaller than 1. 2 AWG. 2. 4 AWG. 3. 6 AWG. 4. 8 AWG.
4. 8 AWG.
Conductor sizes are expressed in circular mils or 1. BTU. 2. NEMA. 3. UL. 4. AWG.
4. AWG.
The authority having jurisdiction allows a legally required stand by system to be supplied from a tap in the pull section ahead of the service disconnects of the normal service. Where must the legally required stand by service be located? 1. immediately adjacent to the normal service disconnects. 2. within sight of the normal service disconnects. 3. grouped with the normal service disconnects. 4. sufficiently separate from the normal service disconnects.
4. Sufficiency separate from the normal service disconnects.
Dwelling unit rooms or areas shall be protected by a listed arc-fault circuit interrupter, combination type, installed to provide protection of which of the following? 1. service 2. panelboard 3. feeder circuit 4. branch circuit
4. branch circuit