A 300 HP, 480-volt 451 amp, 3 phase motor has 250 KCMIL Copper service conductors. If this service is grounded to a metal water piping system that can be considered an electrode, the minimum size grounding electrode conductor can be a __________.

A 300 HP, 480-volt 451 amp, 3 phase motor is now protected by a 600 ampere instantaneous trip circuit breaker. The motor overloads are rated and set at 400 amperes. The minimum size of the equipment grounding conductor can now be a __________.

A 300 HP, 480-Volt 451 amp, 3 phase motor is fed with 2 raceways. The minimum size of the equipment grounding conductor in each raceway shall be a __________ conductor if the Automatic Overcurrent Protective Device is rated at 500.

A 300 HP, 480-volt 451 ampere, 3 phase motor has a service with two, 4/0 Copper parallel conductors, the minimum grounded (neutral) size required for the main service can be two, __________ conductors. (Add circular mil areas together).

A 300 HP, 480-Volt 451 ampere, 3 phase motor is now fed with only 1 raceway. This requires all six ungrounded (hot) conductors to be installed in 1 conduit so they must be de-rated to __________.

What is the ampacity needed for a 300 HP, 480-volt, 3 phase motor? This motor will have a continuous duty requiring a 125% rating.

When determining pipe fill requirements, what would be the circular mil size of a #2 AWG conductor?

When determining pipe fill requirements, what would be the approximate area in inches squared for an insulated #2 AWG THWN conductor?

Given you have two, #8 conductors at 0.0366 inches squared and one, #10 conductor at 0.0211 making a total volume of 0.0943 inches, what is the smallest size Flexible Metal Conduit (Flex, or FMC), trade size you can install using the 40% fill column?

When determining pipe fill requirements, what is the capacity in area of a 1 1/4″ Flexible Metal Conduit (Flex, or FMC) with the typical 40% fill column for over 2 wires?

A 20-inch nipple is installed between 2 junction boxes. It is allowed to be filled with conductors to…

How many #6 AWG THW conductors can be installed in a 1 inch EMT conduit?

How many #4 AWG THWN/THHN conductors can you install in a 3/4″ trade size Liquidtight Flexible Nonmetallic Conduit (LFNC)?

Which is a true statement about a Solar Photovoltaic System?

The #8 solid copper bonding conductor for a swimming pool is not required to be connected to the __________.

Article 640 covers equipment and wiring for __________.

Which is not considered an electric vehicle by the NEC?

How many receptacles are required in an elevator machine room?

A feeder to an apartment building supplies power to 2 elevators with a 50% duty cycle. A __________ demand factor shall be applied.

A freestanding office partition with receptacles can be fed by a single flexible cord if __________.

A tenant space in a commercial building with an entrance accessible to customers and pedestrians __________.

Bare bulb lamps are installed behind a theater stage where they might come into contact with combustible scenery material. They need to be free from physical damage, have a guard, and/or provide an air space of at least __________ inch(es) to any combustible material.

How many amperes does a 40 HP three phase 480 volt Induction-Type motor draw (assuming an 80% power factor)?

When a large number of circuits are supplied in a single lighting and appliance panelboard, if there are heavy load conditions excessive temperatures may cause damage. The number of circuits supplied to one panelboard is limited to __________.

Which is an approved method of preventing tension or pull on a flexible cord to the connections?

Besides within 3 feet of a conduit termination, as to a junction box, Rigid Nonmetallic Conduit (RNC, PVC) shall be secured and supported __________.

An underground Rigid Nonmetallic Conduit (RNC, PVC) feeder is considered a wet location, a #12 AWG Nonmetallic Sheathed Cable (Romex, NM) is to be installed in this raceway.

When can a conduit LB condolet contain a splice with wire nuts?

As a general rule, a conduit can be used to support another conduit if __________.

Landscape lighting is installed to enhance appearance at a commercial building. Type UF cable limited to 24 volts is used. When installed under the parking lot it must be at least __________ inches below finished asphalt.

A metal water piping system is available to a separately derived system (transformer) that serves that area.

A structure includes a metal sprinkler piping system, a metal gas piping system, and exposed structural steel available on the site.

A metal gutter has metallic conduits entering it with unused oversized concentric knock outs at those entries.

A 200 ampere service with 2/0 copper service entrance conductors is grounded by running one continuous wire from a metallic piping system, then to 2 ground rods and then to the service neutral bar.

A 1000 ampere service is fed with 3 parallel runs of 350 Kcmil copper conductors per phase. What is the minimum size conductor required to the ground rods?

A copper grounding electrode conductor is ran along the surface of a building between 2 ground rods. It is not subject to physical damage and without covering or protection. What is the minimum size allowed?

An AC transformer operating at 32 volts is required to be grounded __________.

The next standard overcurrent protective device size up can be selected on a single main for your conductors if the device is rated __________ amperes or less.

A service consists of 3 service disconnects. To be considered “grouped” together the disconnects __________.

Large service conductors are terminated in a gutter where taps are made into disconnects.

A large service terminates in a building gutter where taps are made into disconnects. As a general rule, what is the maximum number of disconnects allowed?

A conduit contains service entrance conductors. Which conductors are allowed in that same raceway?

Given a feeder is installed from one structure to another. Because this building is in a remote location, one additional disconnecting means is for a fire pump. The disconnecting means for this fire pump shall __________.

A feeder from one structure is run to another, but first it passes through another 3rd building to get there. It only passes through the 3rd building without any purpose for that structure or load __________.

A commercial kitchen has 2 electric ranges, 2 large ovens and one smaller oven. What is the feeder demand factor percent allowed?

103. Which of these locations requires GFCI protected outlets?

102. Two entrances are required at each end of the working space of large electrical equipment rated __________ amperes or more.

Lighting for a(n) __________ controlled only by automatic means is prohibited.

What is the maximum number of # 12 conductors that can be installed in a 4 11/16″ x 1 1/2″ square junction box?

What is the minimum size conduit for eight #12 AWG THW conductors?

How many 1/0 THHN compact conductors can you install in a 1 1/2″ Electrical Metallic Tubing (EMT)?

How many 1/0 THHN conductors can you install in a 1 1/2″ Electrical Metallic Tubing (EMT)?

Every commercial building accessible to pedestrians is required to have one outlet at the entrance for a sign computed at…

The general wiring method for a large auditorium can be…

Which is not considered a place of assembly?

A museum designed for ___ people or more is considered a place of assembly.

A luminaire (light fixture) used to illuminate a paint spray booth can be a fluorescent if…

In an aircraft hanger…

A commercial repair garage shall have…

In a commercial garage…

Intrinsically safe conductors, raceways, and junction boxes should be identified and colored…

An intrinsically safe (low voltage) circuit is installed in a hazardous location using a metal raceway. It shall be bonded…

In a Class II, Division 2 area, a raceway, which runs into an unclassified area, is required…

A Class I hazardous location J box…

Generally, which is not a true statement?

What is the total required ampacity of conductors supplying 3 motors at 460 volts of 10, 15, and 20 HP, 3-phase induction type?

A receptacle installed to serve a commercial pop machine outdoors…

An isolated grounding receptacle…

What is the ampacity of 2/0 type W cable (cord) with 75º terminations, where it is not installed in a raceway, and not in contact with another conductor?

Electrical Metallic Tubing (EMT) needs to be securely fastened…

Liquidtight Flexible Metal Conduit (LFMC, or Sealtight) can be used…

On an outside 100 ft. run of Rigid Nonmetallic Conduit (RNC, PVC), there is a potential temperature change of 100* F. to 0* (100* change). What is the expansion change in inches you can expect?

What is one example of a use permitted by Type MC Cable that is not of Type AC?

In a junction or pull box with any side over ___ feet, all the conductors shall be cabled, laced, or racked up.

In straight pulls, the length of a junction box is not to be less than ___ times the diameter of the largest raceway.

A typical enclosure with circuit breakers has conductors running through it using it like a raceway.

Which is a true statement for minimum burial cover requirements under 600 volts, under a parking lot?

A 1/0 THWN copper conductor is used with 75-degree terminations requiring the use of the 75-degree column to calculate ampacity. It is installed with a high ambient temperature in the attic of 96-104 degree F. What is the allowable ampacity?

Given a total load of 377 amps, with 75 degree terminations, 3 phase in a metal raceway with no neutral conductor, parallel ______ conductors can be used in one raceway. You can use the 90-degree column for derating. What conductor size could you use?

Given a total load of 377 amps, with 75 degree terminations, 3 phase in a metal raceway with no neutral conductor, all the 6 parallel conductors are now installed in one raceway and need to be now derated to…

Given a total load of 377 amps, with 75-degree terminations, 3 phase in a metal raceway with no neutral conductor; parallel ____ conductors could be used in 2 separate raceways in a commercial installation for one piece of equipment.

When conductors are ran in parallel and an equipment ground is ran in each conduit, the equipment ground size is…

A 1-inch EMT conduit has 18 current carrying conductors in the raceway. What percent of their ampacity is allowed?

Given a 3 phase 4 wire 400 amp commercial service, the neutral carries a major portion in harmonics and is considered current carrying requiring derating, the minimum size ungrounded conductors (hots) with 75 degree C terminations is…

In a conduit system…

If a structure has an installed lightning protection system…

At a separate building supplied from a common service the interior metal water piping system needs to be bonded, the conductor size is based on…

Generally, the main grounding electrode conductor…

A service location contains 3 disconnects.

If made electrodes (ground rods) are to be used for grounding a service….

When a metal underground water pipe is used as an electrode…

A ________ rated circuit breaker is not required to show its interrupting rating.

A commercial service may have up to ________ disconnects maximum, if they are grouped together.

A commercial building may have…

Can fused branch circuits be installed in a conduit with service entrance conductors?

A structure shall be served by only one service unless…

An outside pole light…

Where it is _____ that 2 dissimilar loads will be used simultaneously, it shall be permissible to omit the smaller of the two in calculating the load in a feeder.

In a commercial application, how many receptacles can you put on a 20-amp circuit?

Where there is more than one voltage system at a building, like 480/277 and 120/208, which is a true statement?