Test 5

A means shall be provided to disconnect each 240 V appliance from all ungrounded conductors_______ 1. readily 2. simultaneously 3. consecutively 4. successively

2. simultaneously

What is the maximum overcurrent protection allowed for each of the 8 two wire nonmetallic sheathed cables of 12 AWG installed through the same bored hole in a double top plate (wood framing) that is draft stopped using sealant? 1. 15 amperes. 2. 20 amperes. 3. 25 amperes. 4. 30 amperes.

1. 15 amperes.

Use Ohm's Law to calculate the total circuit ampacity drawn from a parallel circuit that has a source voltage of 480 VAC, and has the following resistive loads; - 200 Ohms - 100 Ohms 40 Ohms 1. 19.2 amperes. 2. 20.1 amperes. 3. 34.5 amperes. 4. 45.3 amperes.

1. 19.2 amperes.

Equipment likely to be worked on while energized shall have a working space width in front of the electric equipment (600-volts or less) NOT less than 1. 2 1/2 feet. 2. 3 feet 3. 4 feet. 4. 6 feet.

1. 2 1/2 feet.

A unit switch with a marked "OFF" position that is a part of an appliance and disconnects all conductors shall be permitted as the disconnecting means, where other means of disconnect for the occupancy exist including the service or branch circuit disconnects. 1. un-grounded 2. grounding 3. branch 4. neutral

1. un-grounded

In addition to the number of branch circuits required by other sections of the NEC, two or more 20 A small appliance branch circuits shall be provided. However, when calculating the service load requirement using the "Optional Method", how many volt-amperes are added for each circuit? 1. 180 VA 2. 1,500 VA 3. 3,000 VA 4. 4,500 VA

2. 1,500 VA

Overhead conductors must have a minimum horizontal clearance of how many feet from the water's edge of a swimming pool? 1. 5 feet. 2. 10 feet. 3. 12 feet. 4. 15 feet..

2. 10 feet.

An overcurrent protective device for a panelboard shall be located within or at any point on the supply side of the panelboard. Additionally, any panelboards that are equipped with snap switches rated at 30 amperes or less shall have overcurrent protection of HOW MANY amperes or less? 1. 250 amperes 2. 200 amperes 3. 40 amperes 4. 30 amperes

2. 200 amperes

The maximum size of overcurrent device permitted to protect a 4.5 KW, 240-volt, electric 40-gallon water heater is 1. 40 amperes. 2. 30 amperes. 3. 25 amperes. 4. 20 amperes.

2. 30 amperes.

The following are the loads per phases in a wye system. What is the unbalanced neutral load in amperes? A phase 130 amperes B phase 93 amperes C phase = 115 amperes 1. 15 amperes. 2. 32 amperes. 3. 59 amperes. 4. 130 amperes.

2. 32 amperes.

The NEC requires a minimum load for household electric clothes dryers in a dwelling to be either 5,000 VA or the nameplate rating, whichever is larger, for each dryer served. Additionally, the use of the demand factors (derating) shall be permitted to be what percentage if the feeder load will be a total of 15 household clothes dryers. 1. 47% 2. 43% 3. 35% 4. 25%

2. 43%

The feeder conductor ampacity shall not be less than that of the service conductors where the feeder conductors carry the total load supplied by service conductors with an ampacity of 1. 50 amperes or less. 2. 55 amperes or less. 3. 75 amperes or less. 4. 85 amperes or less.

2. 55 amperes or less.

Non-shielded conductors over 600-volts shall NOT be bent to a radius less than how many times the overall diameter of the conductor? 1. 12 times. 2. 8 times. 3. 6 times. 4. 4 times.

2. 8 times

According to the NEC, the definition "Constructed so that moisture will not enter the enclosure under specified test conditions" describes which of the following? 1. Weather proof 2. Water tight 3. Water repellent 4. Water resistant

2. Water tight

Determine the minimum demand for the following single phase ranges on a 120/208v 3-phase, 4 wire feeder: two 10 Kw ranges three 14 Kw ranges three 12 Kw ranges one 16 Kw range 1. 13.11 Kw. 2. 21 Kw. 3. 33.08 Kw. 4. 118 KW.

3. 33.08 Kw.

Equipment grounding conductors shall not be required to be larger than the circuit conductors supplying the equipment. Therefore, if the feeder tap uses 4 AWG conductors and protected by fuses rated at 90 amperes, what would be the minimum size for the equipment grounding conductor? 1. 12 AWG. 2. 10 AWG. 3. 8 AWG. 4. 6 AWG.

3. 8 AWG.

Calculate the allowable ampacity of each conductor (derated current in amperes) if commercial installation requires six (6) current carrying conductors to be ran together. The size of the Aluminum conductors are 8 AWG, insulated with THWN, and will be operating at an ambient temperature of 45 degrees C. 1. 40.0 amperes. 2. 32.8 amperes. 3. 30.0 amperes. 4. 26.2 amperes.

4. 26.2 amperes.

With switchboards and panel boards, the conduit or raceway, including their end fittings, shall not rise more than HOW MANY inches above the bottom of the enclosure? 1. 6 inches. 2. 5 inches. 3. 4 inches. 4. 3 inches.

4. 3 inches.

Calculate the maximum standard rating (not to exceed the value calculated) of a motor branch circuit, short circuit, or ground fault protective device given the following conditions: - Operating Voltage: 230 volts - Electric Power: Three Phase - Motor Horsepower: 10 HP - Motor Type: Squirrel Cage - Protective Device: Instantaneous Trip Breaker 1. 200 amperes 2. 175 amperes 3. 150 amperes 4. 125 amperes

1. 200 amperes

The distance between bare metal parts, busbars, and so forth shall not be less than specified in the National Electrical Code. Therefore, given that a panelboard is rated for 250 V, what would be the minimum required spacing between the bare metal parts where the opposite polarity device or material is held free in air? 1. 3/4 inch 2. 1-1/4 inches 3. 2 inches 4. 3-1/2 inches

1. 3/4 inch

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

How much resistance must be added in series to an existing 40 Ohm load to limit the current in the circuit to 2 amperes, given that the circuit is operating across a 240 voit source? 1. 80 Ohms. 2. 90 Ohms 3. 115 Ohms. 4. 230 Ohms.

1. 80 Ohms.

Storage batteries supplying a legally required standby system MUST provide power for 1. 1 hour. 2. 1 1/2 hours. 3. 2 hours. 4. 2 1/4 hours.

2. 1 1/2 hours.

Calculate the maximum standard rating (not to exceed the value calculated) of a motor branch circuit, short circuit, or ground fault protective device given the following conditions: - Operating Voltage: 480 volts - Electric Power: Three Phase - Motor Horsepower: 30 HP Motor Type: Design B energy efficient - Protective Device: Inverse Time Breaker 1. 90 amperes. 2. 100 amperes. 3. 110 amperes. 4. 125 amperes.

2. 100 amperes.

A cable bus shall be supported at intervals in accordance with the installation and manufacturer's instructions. The NEC specifically requires that a cable bus shall be securely supported at intervals not exceeding HOW MANY feet in length (excluding exceptions)? 1. 15 feet 2. 12 feet 3. 10 feet 4. 6 feet

2. 12 feet

What would be the minimum size electrical box given that four 2" conduits enter the side of the box, and four 2" conduits also exit the bottom of the enclosure? Assume a 600 V external installation. 1. 12 inches by 16 inches 2. 18 inches by 18 inches 3. 22 inches by 22 inches 4. 20 inches by 24 inches

2. 18 inches by 18 inches

In addition to the number of branch circuits required in other areas, at least one additional branch circuit shall be provided to supply the laundry receptacle outlet of an individual dwelling laundry circuit. 1. 15 amperes 2. 20 amperes 3. 25 amperes 4. 30 amperes

2. 20 amperes

In a health care facility, in the event of a power outage, the emergency system shall be automatically restored to operation within 1. 10 seconds after interruption of the normal source. 2. 20 seconds after interruption of the normal source. 3. 1 minute after interruption of the normal source. 4. 5 minutes after interruption of the normal source.

2. 20 seconds after interruption of the normal source.

If a feeder overcurrent protection is 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

The minimum clearance between luminaires installed in clothes closets and the nearest point of a closet storage space shall be HOW MANY inches if the installation is for a surface-mounted incandescent or LED luminaires? 1. 20 inches 2. 16 inches 3. 12 inches 4. 6 inches

3. 12 inches

Conductors supplying several motors, or a motor and other load(s), shall have an ampacity not less than the sum of each of the other motors in the circuit and _____ of the full-load current rating of the highest rated motor in the circuit. 1. 100 percent 2. 115 percent 3. 125 percent 4. 150 percent

3. 125 percent

Use Ohms Law to calculate what the resultant wattage load of each bulb given that two (2) 100 Watt light bulbs are connected in series across a source voltage of 120 Volts. 1. 200 Watts 2. 100 Watts 3. 25 Watts 4. 0 Watts

3. 25 Watts

Direct-current circuits and systems shall be grounded, additionally, the neutral conductor of all direct current systems supplying premises wiring shall be grounded. 1. 5-wire 2. 4-wire 3. 3-wire 4. single-phase

3. 3-wire

All electrical pool water heaters shall have the heating elements subdivided into loads not exceeding how many amperes? 1. 60 2.50 3. 48 4. 24

3. 48

Where separate equipment grounding conductors and supply-side bonding jumpers are installed, what would be the minimum size bonding jumper for a 112 kVA rated transformer operating at 480/277 volts, three-phase that has a connected load of 100,000 volt amperes. 1. 10 AWG 2. 8 AWG 3. 6 AWG 4. 4 AWG

3. 6 AWG

Enclosures housing electrical apparatus, 600-volt or less, that are controlled by lock and key shall be considered 1. safe to qualified persons. 2. intrinsically safe to qualified persons. 3. accessible to qualified persons. 4. readily accessible to qualified persons.

3. Accessible to qualified persons.

Unless otherwise permitted by local regulations, armored cable (AC) shall be secured within HOW MANY inches of every box, cabinet, or fitting and at intervals not 4.5 feet where installed on or across framing members? 1. 2 inches 2. 4 inches 3. 6 inches 4. 12 inches

4. 12 inches

What would be the calculated circuit ampacity given the following combination of 120 volt loads; (1) Motor rated at 3.3 amperes (1) Receptacle rated at 180 VA (1) Lighting circuit rated at 7.0 amperes 1. 11.8 amperes 2. 10.3 amperes 3. 13.5 amperes 4. 12.6 amperes

4. 12.6 amperes

What would be the calculated feeder overcurrent protection given that a three phase 240 volt source feeder has the four motors listed below? Motor 1: 15 HP Motor 2: 10 HP Motor 3: 10 HP Motor 4: 5 HP (15 minute rated, periodic duty) 1. 180 A 2. 170 A 3. 160 A 4. 150 A

4. 150 A

What would be the New Load available from an existing 400 amp four-wire three-phase service installation? Given that the maximum demand data available for a 1-year was measured by a ammeter or power meter to be 100 amperes, and the service operating voltage is a 277/480 voltage source. 1. 430 amperes 2. 400 amperes 3. 300 amperes 4. 275 amperes

4. 275 amperes

Calculate the minimum size Schedule 40 PVC required to install four (4) THHN conductors; 2- 500 kcmil, 1 350 kcmil, 1-#2 AWG. 1. 1-1/2 2. 2 3. 2-1/2 4. 3

4. 3

The length of free conductors at outlets, junctions, and switch points must be at least HOW MANY inches, as measured from the point in the box where it emerges from its raceway or cable sheath? 1. 3 in. 2. 4 in.. 3. 5 in. 4. 6 in.

4. 6 in.

Direct-buried cable or conduit or other raceways shall be installed to meet the minimum cover requirements of the NEC. What would be the Rigid Metal Conduit or Intermediate Metal Conduit minimum direct buried outdoor requirement? 1. 24 inches 2. 18 inches 3. 12 inches 4. 6 inches

4. 6 inches

The use of electrical non-metallic tubing and fittings shall NOT be permitted in the following locations? 1. Direct earth burial 2. Encased in poured concrete 3. Wet locations indoors 4. Concealed, dry, and damp locations

1. Direct earth burial

How many 15 ampere branch circuits would be required for the general lighting load of a 2,150 square-foot dwelling living space? 1. Four 2. Five 3. Six 4. Seven

1. Four

For a building with outside circuits over 1000 volts that has any combination of feeders, branch circuits, or services passing through or supplying it, a _____ or directory shall be installed at each feeder and branch-circuit disconnect location. 1. permanent plaque 2. service lateral 3. separate disconnect for each line 4. lockable branch circuit disconnecting means

1. Permanent plaque

A submersible pump flexible cord immersed in or exposed to water shall be of a type for extra-hard usage, as designated in Table 400.4, and shall be a listed of which type? 1. SEW 2. THHN 3. THWN 4. NM

1. SEW

According to the National Electrical Code, which of the following (amongst others) is an acceptable location when installing Type UF cable? 1. Wet, dry, or corrosive locations. 2. Hoistways, elevators, or escalators. 3. Theaters, or picture studios. 4. Commercial garages.

1. Wet, dry, or corrosive locations.

An equipment grounding conductor shall be installed, where it consists of a raceway, cable tray, cable armor, cable bus framework, or_____ 1. contain a wire type grounding conductor 2. contain a grounded wire 3. be listed as fixture conductor 4. be listed as switch control wire

1. contain a grounded wire

Access and working space shall be provided and maintained about all electrical equipment to permit ready and safe operation and maintenance of such equipment. Therefore, what would be the minimum working space width for any wall mounted panelboard? 1. Width of the equipment. 2. Width of the equipment or 30 inches, whichever is greater. 3. Width of the equipment or 3 feet. 4. Width of the equipment or 3 feet 6 inches, whichever is greater.

2. Width of the equipment or 30 inches, whichever is greater.

Fixture wires that are intended to be used as _______________ conductors shall be identified by one or more continuous white stripes on other than green insulation or by other approved means? 1. grounding 2. grounded 3. ungrounded 4. switched

2. grounded

Where flexible cord or tinsel cord is approved for and used with a specific listed appliance or luminaire, it shall be considered to be protected when applied 1. with the overcurrent device is between 20 and 40 amperes. 2. within the appliance's listing requirements. 3. according to the manufactures label instructions. 4. using the overcurrent size requirements listed in Table 250.66.

2. within the appliance's listing requirements.

Each service drop, set of overhead service conductors, set of underground service conductors, or service. lateral shall supply how many sets of service entrance conductors. 1. 3 2. 2 3. 1 4. none

3. 1

For a solidly grounded wye electric service between 150 V and 1000 V, and a 1000 A service disconnect, the ground fault protection system shall operate at a maximum setting of how many amperes? 1. 3,000 amperes 2. 2,000 amperes 3. 1,200 amperes 4. 1,000 amperes

3. 1,200 amperes

Calculate the minimum box volume required for the following material: -Two # 12 AWG ungrounded conductors that enter and exit (pass through) the box unbroken , - Two # 14 AWG ungrounded conductors that enter and exit, but are spliced inside the box. Consider the Exception: "An equipment grounding conductor or conductors or not over four fixture wires smaller than 14 AWG, or both, shall be permitted to be omitted from the calculations where they enter a box from a domed luminaire or similar canopy and terminate within that box." 1. 11.5 cubic inches 2. 10.0 cubic inches 3. 8.5 cubic inches 14. 6.0 cubic inches

3. 8.5 cubic inches

Flexible metallic tubing shall not be used in 1. branch circuits 2. motors 3. storage battery rooms 4. luminaires

3. storage battery rooms

The NEC provides practical safeguarding for flexible cords and cables. Given, a flexible multiconductor hard service cord contains only three conductors, Thermoset Type SOO size 8 AWG, that only 2 conductors carry current. What would be the maximum ampacity of each current carrying conductor? 1. 20 amperes 2. 25 amperes 3. 35 amperes 4. 40 amperes

4. 40 amperes

Every circuit breaker having an interrupting rating other than HOW MANY amperes shall have its interrupting rating shown on the circuit breaker. 1. 20,000 amperes 2. 15,000 amperes 3. 10,000 amperes 4. 5,000 amperes

4. 5,000 amperes

The total marked rating of a cord-and attachment-plug-connected room air conditioner shall not exceed ________ of the rating of a branch circuit where lighting outlets, other appliances, or general-use receptacles are also supplied. 1. 125 percent 2. 80 percent 3. 75 percent 4. 50 percent

4. 50 percent

Service conductors shall be considered outside of a building or other structure EXCEPT 1. where installed in a transformer vault meeting the construction requirements as in Article 450 Part III. 2. where installed under not less than 2 inches of concrete beneath a building or other structure. 3. where installed within a building or other structure in a raceway encased in concrete or brick not less than 2 inches thick. 4. where installed in a 4 hour rated sheetrock wall.

4. where installed in a 4 hour rated sheetrock wall.

The starting and running voltage drop of a fire pump must be limited using a minimum conductor rated at how many amperes, considering that the pump and its associated loads draw 120 amperes during normal operation? 1. 150 amperes 2. 138 amperes 3. 125 amperes. 4. 90 amperes.

1. 150 amperes

Temporary installation receptacle outlets that are a part of a 12-kW portable generator manufactured after 2010 shall have listed ground-fault circuit interrupter protection for personnel. If the generator has several outlets, which of the statements below would be the most accurate statement regarding the requirement of GFCI protection? 1. all 20-ampere, 125-volt receptacles. 2. only one of the 20 ampere, 120V receptacle. 3. only two of the 20 ampere, 120V receptacles. 4. only one of the 30+ ampere, 120V receptacle.

1. all 20-ampere, 125-volt receptacles.

A manufactured assembly designed to support and luminaires that are capable of being readily repositioned on the track. Its length can be altered by the addition or subtraction of sections of track. 1. energize 2. drive 3. electrify 4. activate

1. energize

Electrical equipment and wiring, including boxes, fitting and joints for all voltages in Class 1, Division 1 and 2 locations shall be which of the following? 1. explosion proof 2. dust proof 3. dust tight 4. shatter proof

1. explosion proof

In a dwelling unit, it shall be permissible to apply a demand factor of 75 percent to the nameplate rating load of HOW MANY appliances fastened in place, other than electric ranges, clothes dryers, and HVAC equipment that are served by the same feeder or service? 1. four or more 2. three or more 3. two or more 4. one or more

1. four or more

Snap switches, including dimmers, shall be effectively grounded and shall provide a means to 1. ground metal faceplates. 2. allow for 8 AWG conductors. 3. disconnect the grounded conductor. 4. limit fault current.

1. ground metal faceplates.

All conductors of a multi-wire branch circuit shall originate from the same panelboard,simultaneously disconnect all ungrounded conductors, and supply only line-to- loads. 1. neutral 2. ground 3. line: 4. hot

1. neutral

In aircraft hangars, equipment with electric components suitable to be moved by a single person without mechanical aides is defined as 1. portable equipment. 2. transferable equipment. 3. mobile equipment. 4. motorized equipment.

1. portable equipment.

The branch-circuit short-circuit and ground fault protective device protecting a circuit to which a motor or motor compressor is connected shall have sufficient to permit the motor to start and accelerate its load. 1. time delay 2. voltage 3. power or load 4. faulted circuit

1. time delay

A commercial building has a 120/208 volt three-phase panel sourcing various loads; including 30,000 Watts of lighting, and Twenty-five general purpose receptacles. After applying the demand for each of th load types, what would be the minimum THWN copper conductors required for this panel? 1. 2/0 AWG 2. 1/0 AWG 3. 1 AWG 4. 2 AWG

2. 1/0 AWG

Direct-buried cable, conduit, or other raceways shall be installed to meet the minimum cover requirements of Table 300.5. However, when the conductors emerge from grade the conductors entering a building shall be protected to which of the following? 1. 12 inches below finished grade to the point where it enters the building. 2. 18 inches below finished grade to the point where it enters the building. 3. 6 inches below finished grade to 6 feet above finished grade. 4. 24 inches below finished grade to 8 feet above finished grade.

2. 18 inches below finished grade to the point where it enters the building.

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.

What would be the maximum rating or setting of the primary overcurrent protection (with primary and secondary overcurrent protection), given a 117 kVA transformer with a primary voltage of 480 volts three-phase? 1. 300% 2. 250% 3. 167% 4. 125%

2. 250%

An installation uses flexible metal conduit that must contain eight (8) number 10 AWG conductors. These eight wires are insulated with THHN. What would be the required minimum trade size of the raceway? 1. 1-1/4 inches 2. 3/4 inch 3. 1/2 inch 4. 3/8 inch

2. 3/4 inch

The ventilation requirement for charging an electric vehicle in an indoor enclosed space shall be a minimum of what CFM given the following variables? Branch Circuit Ampere Rating: 40 amperes Branch Circuit Voltage: 240 Volts - Phase Type: 3 Phase 1. 246 2. 342 3. 683 4. 854

2. 342

It shall be permissible to calculate the branch-circuit load for one range in accordance with Table 220.55. Therefore, if a single family dwelling with a 120/240-volt service will have an electric range installed that is rated at 12 kW, what would be the minimum branch-circuit rating? 1. 45 amperes 2. 40 amperes 3. 35 amperes 4. 30 amperes

2. 40 amperes

Each equipment grounding conductor shall be sized on the basis of the ampere rating of the overcurrent device protecting the circuit. Therefore, what would be the copper equipment grounding conductor size for a feeder that is protected by a 70 ampere rated overcurrent device? 1. 10 AWG. 2. 8 AWG. 3. 6 AWG. 4. 4 AWG.

2. 8 AWG

What type of circuit would be required to provide a total DC source voltage of 48 volts given the following components: Eight, 6V batteries -Load is a 120 VAC system 1. Parallel-connected 2. Series-connected 3. Parallel-series 4. Series-parallel

2. Series- connected

The ampacity for conductors must be derated for ambient temperatures using the correction factor tables of the National Electrical Code. Therefore, what would be the maximum conductor ampacity permitted given the following installation? - Number of conductors: Ten - Conductor Size: 12 AWG - Insulation Type: THHN - Ambient Temperature: 86 degrees F 1. 24 2. 21 3. 15 14. 10

3. 15

Determine the minimum demand in amperes that is required to supply 100 single phase 15 Kw ranges connected to a 120/208 volt, three-phase, four-wire feeder. 1. 211 amperes. 2. 243 amperes. 3. 364 amperes. 4. 4,166 amperes.

3. 364 amperes.

Heat pumps and air conditioners shall have both the duct heater and heat pump or air conditioner identified at suitable for such installation and so marked if they have duct heaters closer than how many feet to the heat pump or air conditioner 1. 6 feet. 2. 5 feet. 3. 4 feet. 4. 3 feet.

3. 4 feet.

What would be the calculated minimum size feeder circuit conductors for Multiple Motors on the same feeder given the following conditions? - Operating Voltage: 230 volts - Electric Power: Three-Phase Motor Types: Design B - Motor 1: 10 HP, nameplate rating of 24 amperes. - Motor 2: 2 HP, nameplate rating of 4.7 amperes. 1. 1 AWG 2. 3 AWG 3. 8 AWG 4. 10 AWG

3. 8 AWG

Field installed skeleton tubing rated over 1000 volts, outline lighting, and secondary wiring connections (points of transition) shall be electrically and mechanically secure and shall be made in which of the following? 1. A suitable box, or conduit body. 2. A pressurized enclosure or pull box. 3. An enclosure listed for the purpose. 4. Flexible metal IMC or Schedule 80 PVC.

3. An enclosure listed for the purpose.

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 2. Two 3. One 4. Zero.

3. One

Hallways in dwelling units do require receptacle outlets. Therefore, if a home has a long hallway that is 21 feet in length, how many receptacles are required by the NEC? 1. Three 2. Two 3. One 4. None

3. One

Conductors shall not be installed in cellular metal floor raceways where subject to 1. methane vapors. 2. toxic vapors. 3. corrosive vapors. 4. noxious vapors.

3. corrosive vapors.

Conductors that source equipment, such as motors, controllers, or equipment that are direct-buried conductors shall be permitted to be spliced or tapped without the use of which of the following? 1. metallic conduit 2. shielded cable 3. splice boxes 4. steel plates

3. splice boxes

What would be the required equipment grounding conductor size given that the circuit was protected by a 500 ampere circuit breaker if the equipment grounding conductor installed was to be an aluminum conductor? 1. 3 AWG 2. 2 AWG. 3. 1 AWG. 4. 1/0 AWG.

4. 1/0 AWG

Multiconductor portable cables over 600-volts used to connect mobile equipment or machinery shall be constructed with conductors which shall be number what AWG copper or larger and employ flexible stranding? 1. 6 AWG. 2. 8 AWG 3. 10 AWG 4. 12 AWG

4. 12 AWG

Sign outlets must be in an accessible location external to the commercial occupancy. These outlets shall be supplied by a branch circuit rated at least 20 amperes that supplies no other loads. Excluding any exceptions, what would be the maximum ampacity on the sign branch circuit breaker? 1. 30 amperes 2. 25 amperes 3. 20 amperes 4. 16 amperes

4. 16 amperes

The NEC states that the sum of the cross sectional areas of all contained conductors and cables at any cross section of a wireway shall not exceed 20 percent of the interior cross-sectional area of the wireway. Therefore, if a wireway is to contain only two (2) cables, each with an area of 1.6 in-sq, what would be the minimum required wireway? 1. 8 square inches 2. 11 square inches 3. 13 square inches 4. 16 square inches

4. 16 square inches

For a three-phase electric power installation, what would be the theoretical voltage measured between the High Leg and the Grounded conductor, of a 3-phase High-leg Delta, 4-wire 120/240 volt electrical service connection? 1. 460 2. 277 3. 240 4. 208

4. 208

According to the NEC multiple clothes dryers are permitted to be derated by a factor less than 100%, therefore, if a multi-family dwelling has five electric clothes dryers installed, what would be the total calculated demand load for this installation after derating is applied. 1. 31,250 VA 2. 29,411 VA 3. 25,000 VA 4. 21,250 VA

4. 21,250 VA

A bonding jumper not smaller than what trade size copper or equivalent shall be connected between the communications grounding electrode and power grounding electrode system at the building or structure served where separate electrodes are used. 1. 2 AWG 2. 3 AWG 3. 4 AWG 4. 6 AWG

4. 6 AWG

A bonding jumper that ensures the required electrical conductivity between metal parts is installed on the supply side of a transformer shall be WHAT SIZE, given that the transformer secondary conductors are 1/0 AWG? 1. 1/0 AWG 2. 2 AWG 3. 4 AWG 4. 6 AWG

4. 6 AWG

A metal underground water pipe shall be supplemented by an additional electrode. If the additional electrode is of the rod, pipe, or plate type, it must be bonded to any of the items listed below, except which one? 1. The grounding electrode conductor. 2. The grounded service-entrance conductor. 3. Any grounded service enclosure. 4. A feeder panelboard.

4. A feeder panel board.

The arc-fault circuit interrupter shall be provided and installed in a readily accessible location of each dwelling, however, which of the following areas does NOT require arc-fault circuit interrupter protection? 1. Closets. 2. Hallways. 3. Laundry. 4. Bathrooms.

4. Bathrooms.

Connectors, terminals and splices must be identified for the specific conductor class. Additionally, wire connectors or splicing means installed on conductors for direct burial shall be which of the following? 1. CE Registered 2. CSA Certified 3. UL Approved 4. Listed

4. Listed

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

When installing cellular metal floor raceways, the conductors shall NOT be installed if in any hazardous/classified location, commercial garages, or where subject to which of the following? 1. toxic dust. 2. noxious gasess. 3. methane liquid. 4. corrosive vapors.

4. corrosive vapors.