325 Practice Questions for Electricians

The operating handle of a circuit breaker shall be permitted to be accessible without opening a door or cover.

What’s the ampacity of 4 current carrying #8 THHN conductors installed in an ambient temperature of 90-degrees F?

The operating handle of a circuit breaker shall be permitted to be accessible without opening a door or cover.

For a one-family dwelling with a service rated 400-amps, the service conductors supplying the entire load associated with a one-family dwelling, or the service conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not less than __________ of the service rating.

Exposed structural metal that is interconnected to form a metal building frame and is not intentionally grounded or bonded and is likely to become energized shall be bonded to which of the following:

Exposed structural metal that is interconnected to form a metal building frame and is not intentionally grounded or bonded and is likely to become energized shall be bonded to which of the following:

The radius of the curve of the inner edge of any bend of Type SE cable, during or after installation, shall not be less than __________ the diameter of the cable.

When calculating a service load, a load of not less than __________ volt-amperes shall be included for each 2-wire laundry branch circuit installed.

Metal cable tray can be used as an equipment grounding conductor where __________.

Electrified truck parking space equipment provided from either overhead gantry or cable management systems shall __________ in electrified truck parking space supply equipment.

Cable trays used to support service-entrance conductors shall contain only service-entrance conductors and shall be limited to which of the following methods:

When installing conductors in a rigid metal conduit that is buried under 3 inches of concrete, to what depth does this conduit need to be buried?

Cable trays used to support service entrance conductors shall contain only service entrance conductors.

Electrical continuity at service equipment, service raceways, and service conductor enclosures shall be ensured by one of the following methods:

Receptacles shall be mounted in identified boxes or assemblies. The boxes or assemblies shall be securely fastened in place unless otherwise permitted elsewhere in this code. Screws for the purpose of attaching receptacles to a box shall be of the type provided with a listed receptacle, or shall be machine screws having __________ threads per inch:

Receptacles shall be mounted in identified boxes or assemblies. The boxes or assemblies shall be securely fastened in place unless otherwise permitted elsewhere in this code. Screws for the purpose of attaching receptacles to a box shall be of the type provided with a listed receptacle, or shall be machine screws having __________ threads per inch:

A raceway contains (6) 1/0 AWG THW copper conductors across a boiler room ceiling (110-degrees-F). What is the allowable ampacity of these conductors?

When installing Underground Service Conductors, all of the following are approved methods except:

The total cross-sectional area of 100 feet run of 2 inch EMT conduit is 3.356 square inches and has 6 12 AWG conductors inside it. What is the total area allowed to be taken up by all conductors in this conduit, regardless of quantity?

A conducting object through which a direct connection to earth is established is termed a(n):

What is the maximum allowed 1/0 AWG THHN conductors can fit in a 1 ½” EMT conduit?

What is the minimum size Flexible Metal Conduit (FMC) that can be used to house the following conductors:

(1) #1 THHN

(2) #2 THHN

(2) #4 THHN

What is the minimum size PVC schedule 40 conduit required for the following conductors?

• (10) 12 AWG THW
• (12) 10 AWG TW
• (6) 8 AWG THHN
• (6) 6 AWG THHN

Audio system equipment supplied by branch-circuit power shall not be placed horizontally within __________ of the inside wall of a pool, spa, hot tub, or fountain, or within __________ of the prevailing or tidal high water mark.

In a Major Repair Garage (where lighter-than-air gaseous fueled vehicles are repaired or stored – such as hydrogen and natural gas), the area within 18 inches of the ceiling is considered what Classification?

For a one-family dwelling with a service rated 400-amps, the service conductors supplying the entire load associated with a one-family dwelling, or the service conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not less than __________ of the service rating.

Antioxidant material suitable for battery connection and termination shall be:

In a multi-family dwelling which of these 120-volt, single-phase, 15- and 20-ampere branch circuits shall be protected with an arc-fault circuit-interrupter?

What is the maximum allowed 1/0 AWG THHN conductors can fit in a 1 ½” EMT conduit?

(3) #6AWG THWN conductors are installed in a 2″ EMT raceway inside a building that is climate controlled to an ambient temperature of 57-degrees F.  What is the corrected ampacity of these conductors after adjustment factors are applied?

A dead end of a busway shall be __________.

The service conductors between the terminals of the service equipment and a point usually outside the building, clear of building walls, where joined by tap or splice to the service drop or overhead service conductors – is defined as what?

Conductors that are capable of being removed or exposed without damaging the building structure or finish or not permanently closed in by the structure or finish of the building is said to be ____________.

A conductor installed on the supply side of a service or within a service equipment enclosure(s), or for a separately derived system, that ensures the required electrical conductivity between metal parts required to be electrically connected is a:

A box containing pendant- or flush-mounted receptacles attached to a multiconductor cable via strain relief or a multipole connector is:

A dead end of a busway shall be __________.

The amount of EMF surrounding a conductor __________ with a(n) __________ in current flow through the conductor.

For each dryer in a dwelling unit, __________ volt-amperes shall be used when calculating the load for the service.

The demand load for a dryer in a single-family dwelling unit, rated at 6,000 VA is __________.

The demand load for the grounded conductor (neutral) for a 6,000 VA dryer is__________.

For permanently connected appliances rated over 300 volt-amperes, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is lockable

Where used as service-entrance conductors, size 250 kcmil Type IGS cable has an allowable ampacity of __________.

The ampacity of UF cable shall be that of:

AFCI protection is not required in which of the following rooms in a dwelling unit?

What is the minimum allowable ampacity of THWN copper conductors run to a three-phase continuous load that is rated 250-volts, 50-amperes which is located 50-feet from its overcurrent device?  The conductors are inside of a piece of 1-inch EMT, the ambient temperature of the environment is 84-degrees Fahrenheit, and there are 3 current-carrying conductors in the raceway.

For permanently connected appliances rated over 300 volt-amperes, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is lockable

Switches or circuit breakers shall not disconnect the grounded conductor of a circuit.

The demand load for a dryer in a single-family dwelling unit, rated at 6,000 VA is __________.

The line demand load and neutral demand load for a dryer with a nameplate rating of 6,500 VA is:

For cord-connected equipment such as room air conditioners, household refrigeration and freezers, drinking water coolers, and beverage dispensers, a separable connector or a(n) __________ shall be permitted to serve as the disconnecting means.

A disconnecting means shall be provided for all __________ derived from a stationary battery system with a voltage over 60-volts DC.  A disconnecting means shall be readily accessible and located within sight of the battery system.

Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect __________ at the point where the branch circuit originates.

For permanently connected appliances rated at not over __________ or 1? 8hp, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is lockable

What is the allowable ampacity for a flexible Type-SO cord with 3 current-carrying conductors?

Switches or circuit breakers shall not disconnect the grounded conductor of a circuit.

A disconnecting means shall be provided for all __________ derived from a stationary battery system with a voltage over 60-volts DC.  A disconnecting means shall be readily accessible and located within sight of the battery system.

A receptacle outlet shall be installed at each countertop and work surface that is __________ or wider.

Type S fuse-holders and adaptors shall be designed so that either the fuse-holder itself or the fuse-holder with a Type S adaptor inserted cannot be used for any fuse other than a Type S fuse.

Type S fuse-holders and adaptors shall be designed so that either the fuse-holder itself or the fuse-holder with a Type S adaptor inserted cannot be used for any fuse other than a Type S fuse.

What is the feeder/service calculated load for (2) 15kW water heaters, (1) 3kW oven, and (1) 2kW deep fryer in a commercial kitchen?

What is the cost of power consumed per month, at $0.09/kWh, for a 120-volt circuit that’s faulted to a ground rod with 25-ohms of resistance?

What is the monthly cost of operating a 240-volt, 5-kW central electric heater that operates 12 hours per day when the cost is 15 cents per kWhr (kilowatt-hour)?

Aircraft energizers shall be designed and mounted such that all electrical equipment and fixed wiring will be at least __________ above floor level and shall not be operated in a Class I location.

The ampacity of UF cable shall be that of:

Which of these are standard ampere ratings for fuses and inverse time circuit breakers?

Which of these are standard ampere ratings for fuses and inverse time circuit breakers?

Type S fuse-holders and adaptors shall be designed so that either the fuse-holder itself or the fuse-holder with a Type S adaptor inserted answer: cannot be used for any fuse other than a Type S fuse.

The Full-Load Current of a 3-phase 230-volt 5-HP AC wound-rotor motor is __________.

What is the full-load current of a 100-HP 500-volt Direct-Current motor?

Fire-Resistive Cable System cables and conductors shall be surface marked with the suffix __________, along with the circuit integrity duration in hours, and with the system identifier.

Overhead conductors for festoon lighting shall not be smaller than 12 AWG unless the conductors are:

The largest number of 4 AWG THW conductors that can be installed an 18-inch piece of 1 1/4″ Liquidtight Flexible Nonmetallic Conduit shall be:

Copper conductors, for each phase, polarity, neutral, or grounded circuit shall be permitted to be connected in parallel (electrically joined at both ends) only in sizes __________ where installed in other than exempt control circuits.

The minimum size service conductors for a 200 Amp service in a single-family dwelling unit is__________.

How many 1/0 AWG XHHW-2 conductors shall be permitted to be installed in a run of 2″ electrical metallic tubing (EMT), not considering ambient correction factors, or number of conductors that are current-carrying.

The total cross-sectional area of 100 feet run of 2 inch EMT conduit is 3.356 square inches and has 6 12 AWG conductors inside it. What is the total area allowed to be taken up by all conductors in this conduit, regardless of quantity?

How many 2/0 RHW-2 conductors can be installed in a run of 2 1/2″ EMT (Electrical Metallic Tubing)?

How many 1/0 AWG XHHW-2 conductors shall be permitted to be installed in a run of 2″ electrical metallic tubing (EMT), not considering ambient correction factors, or number of conductors that are current-carrying.

(3) #6AWG THWN conductors are installed in a 2″ EMT raceway inside a building that is climate controlled to an ambient temperature of 57-degrees F.  What is the corrected ampacity of these conductors after adjustment factors are applied?

Where dimmers are installed in ungrounded conductors, each dimmer shall have overcurrent protection not greater than __________ of the dimmer rating and shall be disconnected from all ungrounded conductors when the master or individual switch or circuit breaker supplying such dimmer is in the open position.

Disregarding special conditions or occupancies, a building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by __________.

Disregarding special conditions or occupancies, a building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by __________.

Fire-Resistive Cable System cables and conductors shall be surface marked with the suffix __________, along with the circuit integrity duration in hours, and with the system identifier.

Fire alarm circuits shall be identified at terminal and junction locations in a manner that __________ during testing and servicing of other systems.

Fire alarm circuits shall be identified __________ in a manner that helps to prevent unintentional signals on fire alarm system circuit(s) during testing and servicing of other systems.

If the voltage drop of a circuit is 3-volts, and the current flowing through that circuit is 100 amperes, what is the resistance?

Find the current of a 120-volt circuit that supplies a lamp which has a resistance of 192 ohms.

The fixed appliance load for a single-family dwelling unit with a 950 VA Garbage Disposal, a 1200 VA Dishwasher and a Water Heater rated at 7500VA, all rated at 120V is __________.

Fixed equipment that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, shall be of the __________ or be constructed so as to prevent the escape of sparks or hot metal particles

The fixed appliance load for a single-family dwelling with the following 120V fixed in place appliances is __________:

• Water Heater- 8000 VA
• Dishwasher- 1600 VA
• Garbage Disposal- 1000VA

Fire alarm circuits shall be identified at terminal and junction locations in a manner that __________ during testing and servicing of other systems.

Fire alarm circuits shall be identified __________ in a manner that helps to prevent unintentional signals on fire alarm system circuit(s) during testing and servicing of other systems.

What is the full-load current of a 100-HP 500-volt Direct-Current motor?

Intrinsically safe apparatus, associated apparatus, and other equipment shall be installed __________, unless the equipment is a simple apparatus that does not interconnect intrinsically safe circuits.

Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage ________ the current that is available at the line terminals of the equipment.

An intersystem bonding termination for connecting intersystem bonding conductors shall be provided __________ enclosures at the service equipment or metering equipment enclosures and at the disconnecting means for any additional buildings or structures.

The ampacity of the supply conductors for a welder that may be operated at different times at different values of primary current or duty cycle shall not be less than __________ of the rated primary current for seam and automatically fed welders, and __________ of the rated primary current for manually operated nonautomatic welders.

Type MC cable that provides an effective ground-fault current path in accordance with one or more of the following, can be used as an equipment grounding conductor:

What is the line demand load for a dryer with a nameplate rating of 4,800 VA.

For cord-connected equipment such as room air conditioners, household refrigeration and freezers, drinking water coolers, and beverage dispensers, a separable connector or a(n) __________ shall be permitted to serve as the disconnecting means.

At all points where the armor of __________ terminates, a fitting shall be provided to protect wires from abrasion, unless the design of the outlet boxes or fittings is such as to afford equal protection, and in addition, an insulating bushing or its equivalent protection shall be provided between the conductors and the armor?

Disregarding exceptions, FMC shall be securely fastened in place by an approved means within __________ of each box, cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not to exceed ___________. Where used, cable ties shall be listed and be identified for securement and support.

A Single-Phase, 3-wire 240-volt service has (2) 2/0 THHN (copper) ungrounded service entrance conductors, what is the minimum size grounding electrode conductor that must be installed?

What is the minimum size of the grounding electrode conductor for a service utilizing 750 KCMIL (CU) for the ungrounded conductors?

The connection of a grounding electrode conductor or bonding jumper to a grounding electrode shall be made in a manner that will:

The connection of a grounding electrode conductor or bonding jumper to a grounding electrode shall be made in a manner that will:

A single-phase 3-wire 200-amp service is constructed at a residence. What size copper grounding electrode conductor needs to be installed on this service?

The equipment grounding terminal buses of the normal and essential branch-circuit panelboards serving the same individual patient care vicinity shall be connected together with an insulated continuous copper conductor not smaller than __________.

1. The TOTAL A/C and heating load for a single-family dwelling unit with a 240-V 18,000 VA heating load and a 240-V 12,000 VA A/C load is__________.

Where heating equipment is supplied by more than one source, feeder, or branch circuit, the disconnecting means shall be __________.  Each disconnecting means shall simultaneously disconnect all ungrounded conductors that it controls.

Fixed electric space heating equipment and motors shall be considered what type of load?

Fixed electric space heating equipment and motors shall be considered what type of load?

Impedance includes the following:

When connecting energy storage systems to other sources, only inverters and ac modules listed and identified as __________ shall be permitted on interactive systems.

In industrial occupancies, infrared industrial process heating equipment lampholders shall be permitted to be operated in series on circuits of __________, provided the voltage rating of the lampholders is not less than the circuit voltage.

Where conductors carrying alternating current are installed in ferrous metal enclosures or ferrous metal raceways, they shall be arranged so as to avoid heating the surrounding ferrous metal by induction. To accomplish this, all phase conductors and, where used, the grounded conductor and all equipment grounding conductors shall be __________.

An intersystem bonding termination for connecting intersystem bonding conductors shall be provided __________ enclosures at the service equipment or metering equipment enclosures and at the disconnecting means for any additional buildings or structures.

The distance outward that an expanding and collapsing electromagnetic field around a conductor can reach, is __________.

Determine the total Heating and A/C load for a single-family dwelling unit with the following (rated at 240 V):

• Heating- 16,000 VA
• A/C- 10,000 VA

Select the feeder conductor size for the following motor group, using 75 degree terminations, and THW copper conductors. (All have a S.F. of 1.15 and a Marked Temp Rise of 40 degrees C):

Motor Group consists of 4 motors tapped on the same feeder:

• Motor 1 – 3 phase, 208 V, 50 HP motor
• Motor 2 – 3 phase, 208 V, 30 HP motor
• Motor 3 – 3 phase, 208 V, 20 HP motor
• Motor 4 – 3 phase, 208 V, 10 HP motor

A receptacle outlet shall be installed at each countertop and work surface that is __________ or wider.

An interlock shall not be required for portable cord-and-plug-connected electric vehicle supply equipment intended for connection to receptacle outlets rated at __________, single phase, 15 and 20 amperes.

Ceiling outlets shall be required to support a luminaire weighing a minimum of __________.  A luminaire that weighs more than __________shall be supported independently of the outlet box, unless the outlet box is listed for not less than the weight to be supported.

On a 4-wire, delta connected system where the midpoint of 1 phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is __________ in color, or by other effective means.

On a 4-wire, delta connected system where the midpoint of 1 phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is __________ in color, or by other effective means.

What is the total neutral load for a 20,000 sq ft bank, with fluorescent luminaires supplied by a 120/208 volt, 3-phase, four-wire service? The bank contains the following equipment:

200 duplex receptacles

4 20-ampere 120-volt dedicated coffee bar circuits

5 30-ampere 208-volt, 3-phase copier outlets (non-continuous)

4 15-kW heat pumps, 3-phase, 208-volt (supplemental heat included)

4 1.5-kW hot water heaters, 3-phase 208-volts

In a Commercial Garage, all 125-volt, single-phase, 15- and 20-ampere receptacles installed in areas where electrical diagnostic equipment, electrical hand tools, or portable lighting equipment are to be used shall have __________.

The minimum size service conductors (AL) for a 150 Amp service in a single-family dwelling unit is __________.

Overhead conductors for festoon lighting shall not be smaller than 12 AWG unless the conductors are:

A 1/0 copper grounding electrode conductor is appropriate for what size ungrounded service-entrance conductors?

Not including special conditions, occupancies, or capacities – the service disconnecting means for each service shall consist of a combination of not more than __________ switches and sets of circuit breakers, mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard or in switchgear.

What is the minimum clearance parameter for an open overhead 240-volt feeder traveling over a pool, from the surface of the water?

A 100x54mm (4×2 1/8”) metal square box, having a minimum volume of 30.3 cubic inches, shall be allowed to have no more than __________ 12 AWG conductors in it.

In straight pulls, the length of the box or conduit body shall not be less than __________ the metric designator (trade size) of the largest raceway.

What is the monthly cost of operating a 240-volt, 5-kW central electric heater that operates 12 hours per day when the cost is 15 cents per kWhr (kilowatt-hour)?

An insulated grounded conductor of 4 AWG or larger shall be identified by which one of the following means:

In overhead services not in excess of 600 volts, nominal, the vertical clearance of final spans above, or within 3 feet measured horizontally of platforms, projections, or surfaces that will permit personal contact shall maintain a minimum clearance of:

In overhead services not in excess of 600 volts, nominal, the vertical clearance of final spans above, or within 3 feet measured horizontally of platforms, projections, or surfaces that will permit personal contact shall maintain a minimum clearance of:

Luminaires shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temperatures in excess of:

Luminaires shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temperatures in excess of:

What is the MAXIMUM size overcurrent protection device required to protect #14AWG conductors used for the pump motor control-circuit that is protected by a motor branch circuit protection device and extends beyond the enclosure?

What is the minimum size Flexible Metal Conduit (FMC) that can be used to house the following conductors:

(1) #1 THHN

(2) #2 THHN

(2) #4 THHN

In an outside branch circuit, open conductors shall be separated from open conductors of other circuits or systems by not less than __________.

Threadless couplings and connectors used with conduit shall be made tight. Where buried in masonry or concrete, they shall be __________.

What is the MAXIMUM size overcurrent protection device required to protect #14AWG conductors used for the pump motor control-circuit that is protected by a motor branch circuit protection device and extends beyond the enclosure?

Screws used for the purpose of attaching receptacles to a box shall be of the type provided with a listed receptacle or shall be machine screws having __________ or part of listed assemblies or systems, in accordance with the manufacturer’s instructions.

Which of the following are not sources of magnetism that can be derived electrically?

The ampacity of the branch circuit conductors and the rating or setting of overcurrent protective devices shall not be less than __________ of the total nameplate rated load.

The ampacity of the branch circuit conductors and the rating or setting of overcurrent protective devices shall not be less than __________ of the total nameplate rated load.

Where Compressed Natural Gas or Liquefied Natural Gas dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitable vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for __________.

Excluding exceptions, the feeder or service neutral load shall be the maximum net calculated load between the neutral conductor and__________.

There shall be no reduction of the neutral or grounded conductor capacity applied to the amount in 220.61(C)(1), or portion of the amount in (C)(2), from that determined by the basic calculation:

1. 220.61(C)(1)

   Any portion of a 3-wire circuit consisting of 2 ungrounded conductors and the neutral conductor of a 4-wire, 3-?phase, wye-connected system

2. 220.61(C)(2)

   That portion consisting of nonlinear loads supplied from a 4-wire, wye-connected, 3-phase system

Where manual transfer equipment is used, an optional standby system shall have adequate capacity and rating for the supply of all equipment intended to be operated at one time.

Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within how many inches of the wall?

Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within how many inches of the wall?

The following methods are approved for outside branch circuits and feeders installed on buildings or other structures except:

It is appropriate to use the “optional feeder and service load calculation” method to a dwelling unit having the total connected load served by a __________ or __________ set of 3 wire service or feeder conductors with an ampacity of 100 amps or greater.

A branch-circuit overcurrent protective device is a device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of over-currents between its __________ and its __________.

Overhead spans of open conductors and open multiconductor cables of not over 1000 volts, nominal, shall have a clearance of not less than __________ over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land traversed by vehicles, such as cultivated, grazing, forest, and orchard

In a dwelling unit, the overhead service conductors (not over 1000 volts) shall be kept not less than __________ feet from the side of a window that is designed to be opened.

What is the total resistance of three 15-ohm resistors connected in parallel?

__________ percent of the peak voltage is the effective voltage.

Excluding exceptions, what is the minimum size of Overhead Service Conductors?

A phase converter with a nameplate input rating of 100FLA, protecting a variable load, shall have overcurrent protection set at __________.

Where manual transfer equipment is used, an optional standby system shall have adequate capacity and rating for the supply of all equipment intended to be operated at one time.

A single-family dwelling has a Single-Phase 125-ampere sub-panel in the garage with a main breaker in it rated at 125-amperes. What size equipment grounding conductor shall be used to feed the sub-panel?

Which of these are “standard sizes” for fuses, in regards to the National Electrical Code?

A bare #4 AWG copper conductor has a diameter of __________.

The Full-Load Current of a 3-phase 230-volt 5-HP AC wound-rotor motor is __________.

A 60 cycle-per-second waveform changes direction __________ times per second.

Electrical service and feeders shall be calculated on the basis of not less than __________ per electrified truck parking space.

Any insulated cable 0-750 volts to ground, supported on and cabled together with a solidly grounded bare messenger or solidly grounded neutral conductor must maintain a clearance of __________ feet in any direction from the water level, edge of water surface, base of diving platform, or permanently anchored raft.

Without applying exceptions, service conductors installed as open conductors or multiconductor cable without an overall outer jacket shall have a clearance of __________ from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations.

A 1/0 copper grounding electrode conductor is appropriate for what size ungrounded service-entrance conductors?

The TOTAL A/C and heating load for a single-family dwelling unit with a 240-V 18,000 VA heating load and a 240-V 12,000 VA A/C load is__________.

Calculate the total service size for the following residence, using the OPTIONAL METHOD:

• 1500 square foot home
• trash compactor 1100VA
• range 6000VA
• dryer 4000VA
• 2 ovens (3kVA each)
• disposal 940VA
• water heater 4500VA
• dishwasher 1250VA
• AC 6440VA
• Heat 9000VA
• Lighting = 4500VA
• Laundry = 1500VA
• Small Appliance = 3000VA

A branch-circuit overcurrent protective device is a device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of over-currents between its __________ and its __________.

In a Patient Care Area, metal enclosures containing a receptacle must be connected to a(n) __________.

Using the standard calculation, what is the general lighting and receptacle load (volt-amperes) for a 2000 square foot dwelling unit with 2 small appliance branch circuits and 1 laundry branch circuit.

How much current would be expected to flow through a 3-phase, 208-volt, 8kW electric heater?

An ohmmeter is used to measure a 120-volt rated toaster’s heating elements.  The elements measure 18-ohms.  How much current is expected to flow through the heating elements?

The range demand load (line and neutral) for a single-family dwelling unit with 1 range rated at 12 kW is__________.

The range demand load (line) for a single-family dwelling unit with one range rated at 10 KW is__________.

50 feet of multi-outlet assembly is to be installed in a commercial retail store.  What is the total calculated load for this assembly?

How much current would be expected to flow through a 3-phase, 208-volt, 8kW electric heater?

Raceways shall be used as a means of support for other raceways under which condition?

Raceways shall be used as a means of support for other raceways under which condition?

Up to __________ sets of 3-wire feeders or __________ sets of 4-wire or 5-wire feeders shall be permitted to utilize a common neutral.

Type MC cable that provides an effective ground-fault current path in accordance with one or more of the following, can be used as an equipment grounding conductor:

In DC electricity, electric current flows in both directions at the same time.