Western Electrical Contractors Association (WECA) 103 Practice Test

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• NEC 430.6(A)(1) requires that the motor full-load amperes listed in Tables 430.247 through 430.250 be used to size all of the following, except for ____________.
• Operating a 240-volt water heater at 208 volts will result in which heat output and life scenario?
• According to NEC Table 220.55, the demand load for a range rated 16 kW is which value?
• Hydromassage bathtubs that are cord and plug connected accessible only through a service access opening shall be installed no more than ___ from the opening.
• Receptacle outlets must be installed in any wall space _____ or more in width.
• The energy required to remove an electron from an atom is called the
• The grounded conductor of a branch circuit is permitted to serve as the equipment grounding conductor for a replacement range or cooktop when all the following conditions are met, except for which?
• NEC 680.71 requires GFCI protection for ________________.
• Bonding metal components in a hydromassage tub is intended to prevent potential differences and reduce shock risk.
• Which NEC article number governs grounding the appliance frame using the grounded conductor of an existing branch circuit?
• ________ covers calculation factors for motor- overload protection.
• A partially protected area, such as an open porch, or under a roof or canopy, is a(n) ____________ location.
• If two conductors are near each other but not touching, a large voltage can cause an
• An individual motor disconnect must be in sight of the motor controller and must disconnect the controller. The NEC definition of in sight means that the controller must be visible and not more than ____ from the disconnect.
• The following receptacle in unfinished basements does not require GFCI protection?
• All of the following shall be counted when calculating box conductor fill, except for _______________.
• When replacing an existing dryer or electric range, NEC Article 250.140 allows the grounded conductor of an existing branch circuit to be used for grounding the appliance frame. This statement describes which option?
• Motor-circuit conductor ampacity values are in accordance with __________.
• Kitchen lighting ________ permitted to be supplied by the two 20-ampere small-appliance circuits required for the kitchen and dining room area.
• NEC 422.60(A) requires that an appliance nameplate show what?
• The 20-ampere branch circuit required for bathroom receptacles is permitted to serve equipment other than receptacles only under which condition?
• Which NEC article covers Nonmetallic-Sheathed Cable (NM) installations?
• A single receptacle (Not Duplex) on a 20-ampere individual branch circuit must be rated ...
• When connecting a multiwire (3-wire) circuit in the panel, two hot circuit conductors must be connected to which phases?
• Minimum cover requirements for direct-buried cables and raceways under a variety of conditions are given in Table _____.
• From Table 430.248, what is the full-load current for a 5 HP / 240V motor?
• Receptacle and cord terminals should be marked as follows;
• Overhead conductors are ______ permitted to be supported by trees.
• Two yoke devices in a box count toward volume as how many conductors?
• Using THHN conductor with 75°C ampacity, what is the ampacity of 10 AWG conductor?
• Which marking should be found on lighting fixtures intended for wet locations?
• Conductors suitable for use ____________ will have the letter "W" in their type designation.
• The branch circuit feeding the required laundry receptacle shall have no other outlets connected.
• To obtain 0.5 A capacity with strings each capable of 0.2 A, how many parallel strings are needed?
• In the voltage drop calculation, what constant is given as K in the example?
• A raised cover (often called a plaster ring or mud ring) is permitted to increase the maximum number of conductors permitted in an outlet box when it is ________________.
• For two ranges with ratings of 14 kW and 16 kW, the initial demand is determined by which method?
• High humidity can cause the following problems, except ____.
• The voltage produced by a thermocouple depends on which of the following?
• Piezoelectricity refers to electricity produced by some materials when they are subjected to which stimulus?
• What is the total cross-sectional area for three 6 AWG THW conductors and two 8 AWG THW conductors?
• During charging, what property makes hydrogen a safety concern?
• The two resistors in a series circuit have voltages of 12 V and 48 V. The applied voltage is _____.
• According to NEC Table 220.55, the demand load for two 14 kW ranges is which value?
• Arc fault protection is required for ____________________________.
• Are single-receptacle outlets serving refrigerators and freezers in unfinished basements and garages required to be GFCI protected?
• Metal clad (MC) cable shall be supported and secured at intervals not exceeding how many feet?
• During charging of lead-acid batteries, which gas is formed that is highly explosive?
• For a separate branch circuit run to a wall-mounted oven or counter-mounted cooking unit, the branch-circuit size is based on ____ of the nameplate rating.
• What is the base ampacity for 12 AWG THHN conductors?
• NEC 110.14(C)(1)(a)(2) states that for circuits rated 100 amperes and less, or for conductor sizes 14 through 1 AWG, conductor ampacity will be selected from the ____ column of Table 310.16.
• NEC 210.23(A)(1) limits any one cord-connected equipment to what percent of a general purpose branch circuit rating?
• Fluorescent luminaries marked 'Suitable for Use in Suspended Ceilings' may be installed
• Fixture whips containing tap conductors used with fixtures in suspended ceilings are permitted to be of various types of cables or conductors in flexible raceways. Fixture whips are permitted to be a maximum of _________ long between outlet box and fixture.
• If a 115/230-volt, dual-voltage motor has a full-load current of 8 amperes at 230 volts, the same motor connected for 115-volt operation will draw _________ amperes.
• Flexible metal conduit (FMC) shall be securely fastened in place within how many inches of each box, cabinet, conduit body, or other conduit termination?
• GFCI protection is required to protect against which hazard?
• Conductor type designation that includes the letter 'W' indicates suitability for use in ______ locations.
• In a dwelling, which term describes a receptacle rated at 30 amperes, and which term describes a receptacle rated at 50 amperes?
• Attic fans are most effective in climates with hot days and cool nights.
• When adding additional lights to a single track, the total resistance of the lighting circuit will do what?
• For ceiling-suspended paddle fans heavier than 35 lbs, the marking shall include the maximum weight to be supported.
• Single phase dual-voltage rated pump motors are rated _________.
• In a recessed fixture, the requirement that allows through wiring conductors to pass through the box is the fixture being marked as Identified for Through Wiring.
• Using the alternative method shown, what is the calculated voltage drop value?
• In a 120/240 V, 3-wire service, the neutral current is 22 amps.
• What is the ground fault/short-circuit protection using an inverse-time circuit breaker for the motor circuit?
• Outdoor lighting fixtures and related equipment are permitted to be supported by trees.
• Dimmers ____ permitted to control switched receptacles intended for plug-in lamps.
• A box contains three 14/3 with ground, one 14/2 with ground, two three-way switches, and one dimmer, with no clamps and all conductors spliced or pigtailed. What is the minimum box volume required (cu in)?
• Which letter marks the equipment grounding terminal on a receptacle?
• If an appliance does not bear a maximum overcurrent protection rating, the branch-circuit protection is sized according to what?
• NEC NM cable derating may be performed from the 90°C rating provided the final derated ampacity does not exceed the rating for which temperature?
• NEC 422.30 through 422.35 allow all of the following disconnecting means for fixed appliances not over 300 VA or 1/8 horsepower except for ____________.
• NEC 406.4(D)(2) permits existing two-wire, nongrounded-type receptacles to be replaced with a _______________________ where no equipment grounding conductor exists.
• What is the minimum size electrical metallic tubing (EMT) required to carry nine 12 AWG THW conductors?
• For 240 V appliances, which of the following is NOT an acceptable disconnecting means?
• Track lighting is not permitted to be installed less than ____ above the floor unless it has an open-circuit voltage of less than 30 volts RMS?
• Which of the following light fixture locations is considered a wet location?
• Which of the following is required in one-family dwellings by NEC 210.11(C)(2)?
• Which areas require the two small-appliance branch circuits?
• When a portable cord-connected dishwasher is used in a kitchen, the 125-volt, 15- or 20-ampere counter-receptacle that it is plugged into is required to have which protection?
• What is the required prohibition for lighting track within the zone extending 3 feet horizontally and 8 feet vertically from the top of the bathtub rim?
• In unfinished basements, NM cable with conductors smaller than two 6 AWG or three 8 AWG installed perpendicular to joists must be run
• A voltaic cell uses an electrolyte such as an
• Using Table 314.16(B), a box containing two switches and two 14/3 NM cables with grounds, no clamps or accessories, all conductors spliced or pigtailed, has a total minimum volume of how many cubic inches?
• In the example calculations, residential circuits commonly use which nominal system voltage?
• Minimum branch circuit size allowed for a range is which of the following?
• What size EMT is required for three 6 AWG THW conductors and two 8 AWG THW conductors?
• A porcelain lampholder with a pull-chain ________ permitted to serve as the attic lighting outlet required by NEC 210.70(A)(3).
• What is the Full Load Current of a 120 volt, 1/3 horse power attic fan motor?
• In the voltage drop calculation, which formula relates current, resistance, and voltage drop?
• Kitchen counter receptacles shall be located not to exceed how many inches above the countertop?
• Kitchen counter receptacles not readily accessible by appliances fastened in place or occupying dedicated space(s) ____________ considered as part of the receptacles required by 210.52(C)(1).
• Which statement is true regarding GFCI protection for kitchen countertop receptacles?
• In a parallel circuit with 30 Ω and 15 Ω resistors, the total resistance is which value?
• Which item is the exception for 125-volt general purpose duplex receptacle circuits serving a kitchen countertop?
• What is the per-cell voltage in a configuration using 0.5 V per cell to reach 12 V?
• In kitchens, a receptacle must be installed at each countertop ____ inches or wider.
• A hydromassage tub is a _______ bathtub equipped with a recirculating piping system, pump and associated equipment.
• When electric clothes dryers are cord-and-plug-connected the receptacle and the cord set must be ______, the ______ wire being a separate equipment-grounding conductor.
• Recessed-mounted lighting fixtures are contained in which NEC Article number?
• What percent of full-load current is allowed as overload protection for motors with service factor 1.15 or greater?
• The minimum depth for a 120-volt, 15-ampere, GFCI-protected circuit to an outdoor pole light run under a paved residential driveway is _________.
• A 120-volt, two-wire circuit contains a(n) ____.
• A small appliance receptacle outlet shall be installed at each wall counter space that is _______ or wider.
• GFCI protection is required for ____________ receptacles installed in a garage or storage building.
• GFCI protection is not required for which equipment?
• What is the cross-sectional area of a 8 AWG THW conductor according to NEC data?
• In a dwelling, receptacles rated at 30 A are referred to as what, and receptacles rated at 50 A are referred to as what?
• Which Code section mandates at least one receptacle outlet in every unfinished basement area?
• For two ranges, averaging 14 kW and 16 kW, the calculation shows a 3 kW over 12 kW. What is the percent adjustment applied?
• When providing a receptacle for a built-in microwave above a countertop, the receptacle should be located inside the upper cabinet and _______.
• What is the track lighting demand for 12 ft of track at 150 VA per 2 ft?
• In a combination circuit, to identify which paths are series and which paths are parallel, you should _____.
• The general method of connecting a residential food-waste disposer is which option, which also provides a convenient means of disconnection?
• What unit is used to measure the load on a small-appliance branch circuit?
• Which method of connection is allowed for a residential food-waste disposer?
• What is the ampacity of a 240 volt, 5500 watt electric dryer?
• X-rays are described as arising from conduction in which phase of matter?
• GFCI protection is required for which receptacles in a garage or storage building?
• What derating factor applies to four to six current-carrying conductors installed in a conduit?
• In the box fill calculation example, what was the total conductor count used to determine the required box volume?
• Fixture whips used in suspended ceilings may be of various cables but are limited in length to a maximum of _______.
• According to Table 220.55, what is the base demand for two ranges?
• To provide shock protection, low-voltage lighting systems are required by Article 411 to be ______.
• Which term describes a device constructed of two unlike metals and an electrolyte, used to produce electricity?
• The manual reset button on a food-waste disposer is used to restart the motor after it trips due to which condition?
• Outdoor lighting fixtures and associated equipment ___________ permitted to be supported by trees.
• A detached garage with electric power is required to have _____.
• The electrical installation requirements for fixed electric space-heating equipment are specified by the NEC in the section devoted to space heating equipment.
• The rating of the overcurrent device for a 1200 watt space heater on a 120-volt circuit, treated as a continuous load, is:
• The two small-appliance branch circuits required for the kitchen and dining room area are intended to supply which type of appliances?
• NEC fill calculations for a conduit nipple not over 24 inches (600 mm) allows the fill percentage for 3 or more conductors not to exceed?
• In new construction, the grounded (neutral) conductor cannot be used to ground the frame of a clothes dryer. What type of power cord is required when a receptacle connection is used?
• A metallic post lamp must have a separate __________________ to serve as an effective grounding path.
• What size attic fan would an electrician need for a 2,150 square foot home?
• Outdoor receptacles rated 125V, 15- and 20-amp are required to be GFCI-protected.
• Which of the following is a valid electrolyte type mentioned for a voltaic cell?
• Which scientist named the device Volta used to produce electricity?
• In the example requiring 480 V between A and B, the resulting current is ______ A.
• If the neutral conductor became disconnected, the voltage across a 40 W load would be?
• Branch circuits are rated according to their _________.
• Use the combination circuit with the following values: R1 = 80 Ohms, R2 = 100 Ohms, and R3 = 400 Ohms, and 480 V is applied between A and B. What is the total current flow?
• Recessed incandescent fixtures shall be what?
• Which formula correctly expresses the relationship between power, voltage, and current for a simple electrical load?
• What does SF stand for on motor nameplates?
• In the voltage drop example, what is the total conductor voltage drop of the circuit described?
• What device is used to measure the specific gravity of an electrolyte?
• The load calculation for an electric dryer in a dwelling shall be ____________ or the nameplate rating, whichever is greater.
• In a 120/240 V three-wire service, the current in the neutral conductor is:
• Branch-circuit conductors to farthest locations in residences may have to be oversized to compensate for which condition?
• For free-standing electric ranges, which NEC provision permits the calculated load to be considerably less than the connected load?
• For the described motor, what is the nameplate current?
• An electrolyte can be checked to ensure the correct chemical composition by measuring its
• What is the metric equivalent of 1 1/2 inches (as used in the mounting clearance)?
• For a 5 HP single-phase 240V motor, what is the minimum size branch circuit conductor?
• A single-pole horsepower-rated disconnect is an acceptable disconnecting means for 240 V appliances.
• The appliance cord for a built-in dishwasher shall be no longer than ______ measured from the cord plug to the back plane of the appliance.
• In NEC box-fill calculations, how many grounding conductors count toward the volume?
• In general, motor disconnects are required to be ________.
• The manual reset button on a food-waste disposer provides which protection required by the code for this type of appliance?
• On all types and ratings of attachment plugs and ratings of receptacles, the grounding blade is which of the following?
• In general, for motors marked with a service factor of 1.15 or greater, motor-overload protection is required not to exceed ____ percent of a motor's full-load current.
• Lighting track in residential installations must not be installed: which of the following configurations?
• Motor-circuit conductors' ampacity values are determined by which NEC section?
• An outlet box feeding a recessed fixture must be a minimum distance from the fixture it feeds?
• Humidistat primary function is to control humidity by turning equipment on or off.
• A unit switch used as a disconnecting means for a clothes dryer shall do what?
• Fixture 'whips' containing tap conductors supplying recessed fixtures shall be a minimum of how many inches in length?
• A combination circuit contains which components?
• A nameplate on an appliance indicates the rating in ______ and amps, or in volts and watts.
• In a commercial building, track lighting load demand is calculated at how many VA per 2 ft of track?
• In a bathroom, a receptacle must be installed within how many inches of the outside edge of the basin?
• For four to six current-carrying conductors in a conduit, which derating percentage corresponds to the specified rule?
• Fluorescent fixtures mounted on low-density cellulose fiberboard must be mounted how far from the fiberboard?
• Lead-acid batteries use an electrolyte containing which acid?
• Which statement counts for box fill: The 16 AWG conductor entering the box from an attached lighting fixture is not counted.
• Resistance of conductors may be found in NEC Chapter 9, which table?
• Where is the receptacle that supplies a built-in dishwasher or disposer installed?
• To control a lighting outlet from three locations, what combination of switches is required?
• Which conduit and wiring reference covers conduit fill and sizing guidelines?
• What determines the voltage produced by a thermocouple?
• The ambient air temperature considered for conductor ampacity is the temperature of the _____?
• The maximum flexible cord length permitted for a kitchen waste disposer is how many feet?
• When outdoor receptacles are installed where a cord will be plugged in permanently, such as for decorative lighting, the box cover ____ maintain weatherproof integrity when the cord is plugged in.
• Which of the following may be included with the kitchen small-appliance branch circuits?
• Which term best describes a circuit that includes both series and parallel components?
• X-rays are the result of conduction in a
• What receptacle ratings are permitted on a 120-volt, 20-amp branch circuit that serves two or more receptacles?
• The most accepted and common setting for a humidistat is _____ relative humidity.
• Lighting track shall be supported twice if the track is not more than how many feet long?
• Suspended-ceiling lighting fixtures must be securely fastened to the ceiling framing members by all of the following means, except:
• In new construction, the grounded conductor cannot be used to ground the frame of a dryer; what type of power cord is required?
• In a two-branch parallel circuit with 30 Ω and 15 Ω resistors, what is the total resistance?
• Solving combination circuits includes a step in which you _____ the circuit to a simpler circuit.
• What was the total conductor length (one-way) used in the voltage drop example?
• Which EMT size is required for three 6 AWG THW conductors and two 8 AWG THW conductors?
• Branch circuit rating is determined by which of the following?
• Derated ampacity of eight 12 AWG THHN current-carrying conductors in a raceway is which amperage?
• The load for each small-appliance branch circuit is calculated at what value?
• When a non-motor-operated appliance is not marked with its overcurrent protective device rating, NEC 422.11(E) states that the branch circuit overcurrent protection shall be one of the following except
• Article ______ covers low-voltage lighting operating at 30 volts RMS or less.
• Which formula is used to calculate current from wattage and voltage in these examples?
• What is the resistance per 1000 feet for 10 AWG copper used in the voltage drop example?
• What particle must be added or removed to form an ion from an atom?
• When branch circuit protection values for motors per Table 430.52 do not correspond to standard NEC 240.6 ratings, the next higher rating is permitted.
• The most important factor in conduction in a gas is
• Which voltage pair is used to describe the dual-voltage capability of the single-phase pump motors?
• In a detached garage with electric power, what minimum outlet and lighting provisions are required?
• What special consideration should be made when installing AFCI breakers?
• Recessed lighting fixtures installed in thermal insulation are rated as what type?
• Which of the following best states the minimum depth requirement for an outdoor lighting circuit to pass under a paved driveway?
• When a three-conductor multi-wire circuit is used to supply split-wired receptacles, how should the neutral conductor be connected?
• For multi-wire branch circuits, the means to simultaneously disconnect all hot conductors is normally provided by which device?
• Overhead conductors ________ permitted to be supported by trees.
• On a standard electrical receptacle, the neutral binding screw is color-coded to which color?
• The 125-volt, 20-amp receptacles installed to serve kitchen countertops must have GFCI protection ...
• What is the cross-sectional area of a 6 AWG THW conductor according to NEC data?
• Calculate the current for a countertop cooking unit rated 7,450 watts at 120/240 volts. The current in amperes is approximately which value?
• What wattage rating is most common for residential dimmers (125 VAC, 60 Hz)?
• When branch circuit protection values for motors per Table 430.52 do not correspond to standard ratings as listed in NEC 240.6, the next ____ rating is permitted to be used.
• Key grounding rules for appliances include all of the following, except which?
• Since the grounded conductor of a branch circuit is not permitted to be used for grounding the frames of ranges, ovens, or cooktops in new installations, these appliances require which type of power cords?
• Using 150 VA per 2 ft of track, what is the track lighting demand for a 6 ft length?
• When a range or dryer is replaced, Article ____ of the NEC permits the grounded conductor of an existing individual branch circuit to be used for grounding the appliance frame.
• Low-voltage lighting operating at 30 volts RMS or less is covered under which article?
• The process of separating elements electrically is known as which?
• Attic fans (whole house fans) are most efficient and can save in air conditioning costs in places where the climate is
• In accessible attics, exposed cables do not need guard strips when they are what?
• Which rule describes the overcurrent protective device sizing for continuous loads on a 1200 W space heater?
• Metallic conduit buried underground must be protected against ______.
• The Code Article that specifically addresses electrical appliances is which article number?
• For a storage-type water heater 120 gallons or less, branch circuit must be not less than what percent of nameplate rating?
• If there are more than _____ current-carrying conductors in a raceway, the ampacity must be derated.
• How many cells 0.5 V, 0.2 A each are required to create a 12 V battery with a 0.5 A capability?
• According to NEC 210.22, the total load of an individual branch circuit is not permitted to exceed what percent of the branch circuit rating?
• Piezoelectricity refers to electricity produced by some materials when subjected to pressure.
• What voltage rating is used for the receptacle that supplies the built-in dishwasher/disposer?
• Which rating applies to luminaires intended to be in direct contact with insulation?
• What is the calculated demand for 30 ft of commercial track lighting?
• The energy required to remove an electron from an atom is called the
• A 120-volt track light with lamp loads totaling 250 watts will draw approximately how many amps?
• All metal piping systems, metal parts of electrical equipment and pump motors associated with the hydromassage tub shall be bonded together using a copper bonding jumper not smaller than:
• A series circuit is a circuit that has only one path for _____ flow.
• Which column of Table 310.16 should be used for conductor ampacity for circuits 100 A or less?
• Humidistats help to reduce the __________ located in homes and commercial buildings.
• Electrical metallic tubing (EMT) shall be securely fastened within how many feet of each outlet box, junction box or other tubing termination?
• Which equation expresses current when power and voltage are known?
• According to NEC Table 220.55, the demand load for two ranges—one 14 kW and one 16 kW—is which value?
• Type UF "underground feeder" cable _______________ permitted to be used to supply service entrances.
• To provide shock protection, low-voltage lighting systems are required by Article 411 to be ______.
• In a bathroom, at least one receptacle must be installed within how many inches of the outside of the basin?
• When running cables parallel to framing members, what minimum distance must be maintained between the cable and the edge of the framing member?
• GFCI devices trip when ground-fault in range of how many milliamperes?
• Which of the following wiring methods are permitted for connecting heavy-duty appliances such as dryers and ranges?
• What is the volume allowance per 14 AWG conductor according to NEC 314.16(B)?
• The partially protected area (open porch under a roof or canopy) is best described as a damp location.
• In a recessed fixture, other conductors may run through the fixture body or outlet box only when the lighting fixture is marked NEC: ______.
• Guard strips are required for exposed cables in accessible attics.
• Lighting fixtures intended for installation in wet locations must be __________.
• What is another common name for a raised cover installed to allow more conductors in a box?
• Each electrical appliance shall be provided with a(n) _____________ with the rating in volts and amps, or in volts and watts.
• Using eight 12 AWG THHN conductors in a raceway, the derated ampacity is which value?
• A 125-volt, 15- or 20-ampere receptacle installed in an under-cabinet space to supply a built in dishwasher and/or food-waste disposer is required to have GFCI protection for personnel. Which option best completes the statement?
• Outdoor weatherproof receptacles on a 20-amp small-appliance branch circuit serving a kitchen or dining area are ...
• When multi-wire branch circuits supply more than one receptacle on the same yoke (strap), the means to simultaneously disconnect all hot conductors at the panelboard is normally provided by a ...
• The grounded conductor of a branch circuit is permitted to serve as the equipment grounding conductor for a replacement electric dryer when all the following conditions are met, except for ______.
• In 1800, Volta called his electricity-producing battery a
• A 125-volt, 15- and 20-ampere receptacle mounted outdoors is required to be ____________.
• Using the 3x sizing rule for attic fans, a 2,150 square foot home yields approximately
• Which statement about 240.4(D) relative to motor circuits is correct?
• A porcelain lampholder with a pull-chain is permitted to serve as the attic lighting outlet required by NEC 210.70(A)(3). Which statement describes this permission?
• Which statement best describes the energy impact of using an attic fan in appropriate climates?
• Arc fault protection is required for which of the following room types in a dwelling?
• The required conduit size for a circuit is determined by conductor fill; allowable conduit fill percentages are found in which reference?
• Fixed panels of glass doors are considered what for receptacle spacing in living rooms?
• Which Code Section prohibits running track lighting through walls or partitions?
• The maximum ampacity of a branch circuit supplying low voltage lighting systems operating at 30 volts or less is ________________.