Unit 9

service-entrance cables shall be supported by straps or other approved means within _____ of every service head, gooseneck, or connection to a raceway or enclosure.

1 Foot (230.51(A))

In damp or wet locations, surface-type cabinets, cutout boxes, and meter socket enclosures shall be so placed or equipped as to prevent moisture or water from entering and accumulating within them, and mounted so there is at least ________ airspace between the enclosure and the wall or other supporting surface.

1/4 inches (A312.2)

1. The point of attachment of the service-drop conductors to a building must not be less than ________ above the finish grade.

10 feet (A230.26)

circuit breakers rated _____ or less and 1000 volts or less shall have the ampere rating molded, stamped, etched, or similarly marked into their handles or escutcheon areas

100 Amps (A240.83(B))

a disconnecting means serving a hermetic refrigerant motor compressor shall be selected on the basis of the nameplate rated-load current or branch-circuit selection current, whichever is greater, and locked-rotor current, respectively, of the motor compressor. The ampere rating shall be at least ____ of the nameplate rated-lad current or branch-circuit selection current, whichever is greater.

115% (A440.12(A) and (A)(1))

Residential 240-volt service-drop conductors must have a vertical clearance above a driveway of at least _________.

12 Feet (A230.24(B)(2))

Where the ungrounded supply conductors are larger than 1100 kcmill copper, the main bonding jumper shall have an area not less than _______ of the area of the largest ungrounded supply conductor.

12.5% ((A250.28(D)(1))-(T250.102(C)(1)))

Each plate electrode shall expose not less than _____ of surface to exterior soil and shall be installed not less than ____below the surface of the earth.

2 feet(Squared) - 2.5 ft (250.52A(7)(A250.53(A)(5))

A ground ring used as a grounding electrode and encircling the building, in direct contact with the earth, must consist of at least ____ft of bare copper conductor not swaller than 2 AWG

20 feet (!250.52(A)(4))

If a single rod, pipe, or plate grounding electrode has a resistance to earth of ___ or less, a supplemental grounding electrode shall not be required.

25 ohms (250.53(A)(2)exc.)

The supply-side bonding jumper shall not be smaller than the sizes shown in Table_________ for grounding electrode conductors.

250.102(C)(1)

An intersystem bonding termination shall consist of a set of terminals with the capacity for connection of not less than ____ intersystem bonding conductors

3 (250.94(A)(2))

Where approved, rigid metal conduit shall not be required to be securely fastened within ______ of the service head for the above-the-roof termination of a mast.

3 feet (A344.30(A)(3))

The minimum depth of working space for a 120/240-volt panelboard, with exposed live parts on one side of the grounded parts on the other, shall be at least ______

3 feet (T110.26(A)(1))

Plug fuses of the Edison-base type shall be classified at not over 125 volts and ______ amps and below

30 (A240.51(A))

The width of the working space in front of electric equipment operating at 1000 volts, nominal, or less to ground shall be the width of the equipment or ___ in., whichever is greater.

30 inches, whichever is greater (!10.26(A(2))

Every circuit breaker having an interrupting rating other than _____ amps shall have its interrupting rating shown on the circuit breaker.

5000 (A240.83(C))

A dwelling has a 175-amp service that is fed with THW copper conductors, the service is supplied by a single-phase, 120/240-volt system. What is the minimum size copper grounding electrode conductor?

6 AWG (T250.66)

If multiple rod, pipe, or plate electrodes are installed to meet the installation requirements of the grounding electrode system, they shall not be less than _____ apart

6 feet (A250.53(A)(3))

Where more than one rode, pipe, or plate grounding electrodes are used, each electrode of one grounding system shall not be less than _____ from any other electrode of another grounding system

6 feet (A250.53(B))

Where installed on the outside of a raceway, the length of the equipment bonding jumper shall not less than ____ and shall be routed with the raceway.

6 feet (A251.102(E)(2))

Other equipment or support structures, such as concrete pads, associated with the electrical installation located above or below the electrical installation shall be permitted to extend not more than _______ beyond the front of the electrical equipment.

6 inches (110.26(A)(3)

The minimum height of working space for equipment operating at 1000 volts, nominal, and likely to require examination, adjustment, servicing, or maintenance while energized shall be ______ or the height of the equipment, whichever is greater

6.5 feet (A110.26(A)(3))

What size copper equipment bonding jumper is required for a 200-amp panelboard located on the load side of the overcurrent device?

6AWG (T250.122)

Service-drop conductors shall have a vertical clearance of not less than _________ above the roof service

8.5 feet (A230.24(A))

Which of the following is not a true statement concerning an equipment grounding conductor? A. Under certain conditions, equipment grounding conductors shall be required to be larger than circuit conductors supplying the equipment B. One equipment grounding conductor may serve multiple circuits C. Under certain conditions, equipment grounding conductors may be run in parallel D. The size of equipment grounding conductors shall be increased where ungrounded conductors are increased in size

A: (A250.122(A))

Which of the following is nto a standard ampere rating for fuses? A.25 amps B.50 amps C.75 amps D.601 amps

C: 75 amps (A240.6(A))

Every circuit and circuit modification in a panelboard shall be legibly identified as to its ___ purpose or use.

Clear, evident, and specific (408.4(A))

Bonding jumpers meeting the other requirements of article 250 shall be used around impaired connections, such as reducing washers or oversized ________ knockouts.

Concentric or eccentric (A250.92(B))

A service disconnect installed for a one=family dwelling unit as the service disconnect and also as the emergency disconnect shall be marked _________

Emergency disconnect (A230.85)

Plug fuses a 15 amp and lower rating shall be identified by a ______configuration of the window cab or other prominent part to distinguish them from fuses of higher ampere ratings.

Hexagonal (A240.50(C))

Energized parts of service equipment that are not enclosed shall be installed on a ___ and guarded in accordance with 110.18 and 110.27. I.switchboard II.panelboard III.control board

I,II, and III (230.62(B))

The _______ is the connection between the grounded circuit conductor and the equipment grounding conductor, or the supply-side bonding jumper, or both, at the service

Main bonding jumper (A100)

A grounded conductor must not be connected to ________ of equipment or to equipment grounding conductors or be reconnected to ground on the load side of the service disconnecting means except as otherwise allowed in article 250

Normally non-metal carrying parts (A250.24(B))

Service conductors are the conductors from the service point to the ______

Service disconnecting means (A100)

A _______ is defined as that which is built or constructed, other than equipment

Structure (A!00)

Service heads on raceways or service-entrance cables and goosenecks in service-entrance cables shall be located _____ the point of attachment, unless impracticable.

goosenecks (A230.54(C))

a _____ is a conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.

grounding electro conductor (A100)

The grounding and bonding of electrical systems, circuit conductors, surge arresters, surge-protective devices, and conductive normally non-current-carrying materials must be installed and arranged in a manner that prevents _____

objectional current (A250.6(A))

Service conductors run above the top level of a window shall be ______

permitted to be less than 3 ft above the window (A230.9 (A) exc.)

in addition the the requirement of 408.30, a panelboard shall be protected by an overcurrent protective device having a rating not greater than ______

the panelboard (A408.36)