Question 1

What is a service drop?

Accepted Answer

A service drop is the overhead...

Question 2

A 4 AWG bare copper conductor at least 20 ft (6.0 m) long installed identically to the steel reinforcing rod is also permitted as a concrete-encased grounding electrode. This is often referred to as a(n) ____________________ ground.

Accepted Answer

The answer of A 4 AWG bare copper conductor at...

Question 3

An exterior raceway containing service entrance conductors must be ____________________ and arranged to drain.

Accepted Answer

The answer of An exterior raceway containing service entrance conductors...

Question 4

It is extremely important that a disconnect or panelboard used as service equipment be marked "____________________."

Accepted Answer

Suitable f...

Question 5

For a one-family residence, the minimum size main service disconnecting means is ____ three-wire.

Accepted Answer

A)   30-ampere
B)   60-ampere
C)   100-ampere
D)   150-ampereE) A) and B)
F) A) and C)

Question 6

Ground rods must be at least ____ ft. in length

Accepted Answer

A)   6
B)   8
C)   10
D)   12E) A) and D)
F) A) and C) B

Question 7

Ground clamps used for bonding and grounding must be ____.

Accepted Answer

A)   approved
B)   copper
C)   steel
D)   listed for the purposeE) A) and B)
F) All of the above

Question 8

If extra support is not to be provided, the mast service conduit must be at least ____ in. in diameter.

Accepted Answer

A)   1
B)   1-1/2
C)   2
D)   2-1/2E) A) and B)
F) B) and C)

Question 9

A panelboard must not be installed in a(n) ____________________.

Accepted Answer

The answer of A panelboard must not be installed in...

Question 10

NEC 300.4(F)  states that if ____ AWG or larger ungrounded circuit conductors enter a cabinet, box enclosure or raceway, an insulating bushing or equivalent must be used.

Accepted Answer

A)   4
B)   6
C)   8
D)   10E) A) and B)
F) C) and D) A

Question 11

Under no circumstances shall the service entrance conductors be less than ____ ft. above finished grade.

Accepted Answer

A)   6
B)   8
C)   10
D)   12E) B) and D)
F) B) and C)

Question 12

When using a metal water pipe as a grounding electrode, a(n) ____________________ is required.

Accepted Answer

supplemental electrode

Question 13

Using an electric rate of $0.07824 per kWh, calculate the cost of running ten 100W lamps for six hours.

Accepted Answer

Cost = watts × hours...

Question 14

A main service disconnect shall not be installed in a ____.

Accepted Answer

A)   bedroom
B)   laundry room
C)   garage
D)   bathroomE) A) and B)
F) B) and D)

Question 15

NEC ____________________ provides rules for working space around electrical equipment.

Accepted Answer

The answer of NEC ____________________ provides rules for working space...

Question 16

____________________ conductors are permitted to be attached to and supported by the service mast.

Accepted Answer

The answer of ____________________ conductors are permitted to be attached...

Question 17

Bonding at service-entrance equipment is very important because service-entrance conductors do not have ____________________ at their line side, other than the electric utility company's primary transformer fuses.

Accepted Answer

overcurren...

Question 18

A working space not less than ____ in. wide and 3 ft deep must be provided in front of electrical equipment, such as panelboards A and B in this residence.

Accepted Answer

A)   16
B)   24
C)   30
D)   36E) A) and B)
F) B) and D)

Question 19

For typical residential wiring, the grounding electrode conductor is run between the ____________________ neutral/ground terminal bar and the grounding electrode system.

Accepted Answer

The answer of For typical residential wiring, the grounding electrode...

Question 20

What are service lateral conductors?

Accepted Answer

If installed by the electric u...

Exam 27: Service-Entrance Equipment

What is a service drop?

Correct AnswerverifiedA service drop is the overhead...View AnswerShow Answer

A 4 AWG bare copper conductor at least 20 ft (6.0 m) long installed identically to the steel reinforcing rod is also permitted as a concrete-encased grounding electrode. This is often referred to as a(n) ____________________ ground.

Correct AnswerverifiedShow Answer

An exterior raceway containing service entrance conductors must be ____________________ and arranged to drain.

Correct AnswerverifiedShow Answer

It is extremely important that a disconnect or panelboard used as service equipment be marked "____________________."

Correct AnswerverifiedSuitable f...View AnswerShow Answer

For a one-family residence, the minimum size main service disconnecting means is ____ three-wire.

Correct AnswerverifiedShow Answer

Ground rods must be at least ____ ft. in length

Correct AnswerverifiedB

Ground clamps used for bonding and grounding must be ____.

Correct AnswerverifiedShow Answer

If extra support is not to be provided, the mast service conduit must be at least ____ in. in diameter.

Correct AnswerverifiedShow Answer

A panelboard must not be installed in a(n) ____________________.

Correct AnswerverifiedShow Answer

NEC 300.4(F) states that if ____ AWG or larger ungrounded circuit conductors enter a cabinet, box enclosure or raceway, an insulating bushing or equivalent must be used.

Correct AnswerverifiedA

Under no circumstances shall the service entrance conductors be less than ____ ft. above finished grade.

Correct AnswerverifiedShow Answer

When using a metal water pipe as a grounding electrode, a(n) ____________________ is required.

Correct Answerverifiedsupplemental electrode

Using an electric rate of $0.07824 per kWh, calculate the cost of running ten 100W lamps for six hours.

Correct AnswerverifiedCost = watts × hours...View AnswerShow Answer

A main service disconnect shall not be installed in a ____.

Correct AnswerverifiedShow Answer

NEC ____________________ provides rules for working space around electrical equipment.

Correct AnswerverifiedShow Answer

____________________ conductors are permitted to be attached to and supported by the service mast.

Correct AnswerverifiedShow Answer

Bonding at service-entrance equipment is very important because service-entrance conductors do not have ____________________ at their line side, other than the electric utility company's primary transformer fuses.

Correct Answerverifiedovercurren...View AnswerShow Answer

A working space not less than ____ in. wide and 3 ft deep must be provided in front of electrical equipment, such as panelboards A and B in this residence.

Correct AnswerverifiedShow Answer

For typical residential wiring, the grounding electrode conductor is run between the ____________________ neutral/ground terminal bar and the grounding electrode system.

Correct AnswerverifiedShow Answer

What are service lateral conductors?

Correct AnswerverifiedIf installed by the electric u...View AnswerShow Answer

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A service drop is the overhead...
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Suitable f...
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B

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A

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supplemental electrode

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Cost = watts × hours...
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overcurren...
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If installed by the electric u...
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