VIRGINIA ELECTRICAL INSPECTOR
#
CERTIFICATION EXAM - 200
COMPLETE PRACTICE QUESTIONS
## SECTION 1: NEC CODE & INSTALLATION (Questions 1-50)
---
**QUESTION 1**
What is the required maximum spacing between receptacles along a residential kitchen countertop
according to the National Electrical Code?
A) No more than 4 feet apart
B) No more than 6 feet apart
C) No more than 8 feet apart
D) No more than 12 feet apart
**Answer: D**
**Rationale:** NEC 210.52(C)(1) requires receptacles be placed so no point along the countertop is
more than 24 inches from a receptacle, translating to maximum 12-foot spacing between receptacles.
---
**QUESTION 2**
Electrical metallic tubing (EMT) connections must be which of the following according to code
requirements?
A) Painted for corrosion resistance only
B) Mechanically secure and electrically continuous
C) Installed without grounding connections
D) Sealed with combustible adhesives
**Answer: B**
**Rationale:** EMT fittings must ensure both mechanical stability and electrical continuity for safety
and proper grounding.
---
**QUESTION 3**
In a residential dwelling, what is the minimum size of a grounding electrode conductor for a 200-
ampere service using copper wire?
A) 6 AWG
B) 4 AWG
C) 2 AWG
D) 1/0 AWG
**Answer: B**
**Rationale:** NEC Table 250.66 specifies 4 AWG copper for a 200-ampere service grounding
electrode conductor.
---
**QUESTION 4**
Which of the following is a permitted use for a 6 AWG copper grounding electrode conductor in an
electrical system?
A) Connecting a service disconnect to the neutral bar
B) Bonding a metal water pipe to the grounding electrode system
C) Carrying unbalanced load current in a multi-wire branch circuit
,D) Supplying power to a feeder circuit
**Answer: B**
**Rationale:** A grounding electrode conductor may be used to bond metal water piping to the
grounding electrode system.
---
**QUESTION 5**
The NEC requires that the service disconnect be installed within how many feet of the point where
service conductors enter the building?
A) 3 feet
B) 6 feet
C) 12 feet
D) 18 feet
**Answer: B**
**Rationale:** NEC 230.70(A) requires the service disconnect to be installed within 6 feet of the
service entrance point.
---
**QUESTION 6**
When installing NM-B (Romex) cable in a residential structure, what is the maximum distance
between support staples?
A) 3 feet
B) 4.5 feet
C) 6 feet
D) 8 feet
**Answer: B**
**Rationale:** NEC 334.30 requires NM cable to be supported at intervals not exceeding 4.5 feet.
---
**QUESTION 7**
What is the minimum size of a grounding electrode conductor for a 100-ampere service using copper
wire?
A) 8 AWG
B) 6 AWG
C) 4 AWG
D) 2 AWG
**Answer: B**
**Rationale:** NEC Table 250.66 indicates a 6 AWG copper grounding electrode conductor for a 100-
ampere service.
---
**QUESTION 8**
For a lighting circuit supplying 12 amperes of continuous load, what is the minimum breaker size
required?
A) 15 amperes
B) 20 amperes
C) 25 amperes
D) 30 amperes
**Answer: B**
**Rationale:** Continuous loads must be sized at 125 percent: 12 amperes times 1.25 equals 15
amperes, so the next standard breaker size is 20 amperes.
---
,**QUESTION 9**
What is the minimum burial depth required for direct burial cables in residential applications?
A) 12 inches
B) 18 inches
C) 24 inches
D) 36 inches
**Answer: C**
**Rationale:** NEC Table 300.5 requires direct burial cables to be buried at least 24 inches deep.
---
**QUESTION 10**
According to NEC, how many branch circuits are required for a residential kitchen?
A) One circuit for all kitchen receptacles
B) At least two small-appliance branch circuits
C) One circuit for each appliance
D) No specific requirement
**Answer: B**
**Rationale:** NEC 210.52(B) requires at least two 20-ampere small-appliance branch circuits for
kitchen receptacles.
---
**QUESTION 11**
What is the maximum number of conductors permitted in a 4-inch square box with a depth of 2-1/8
inches using 14 AWG wire?
A) 6 conductors
B) 8 conductors
C) 10 conductors
D) 12 conductors
**Answer: C**
**Rationale:** NEC Table 314.16(A) specifies the maximum conductor fill based on box volume and
wire size.
---
**QUESTION 12**
Which type of conduit is approved for use in concrete slabs on grade according to NEC?
A) EMT only
B) PVC Schedule 40 or 80
C) Flexible metal conduit
D) Liquidtight flexible nonmetallic conduit
**Answer: B**
**Rationale:** PVC Schedule 40 and 80 are approved for direct burial and concrete encasement
applications.
---
**QUESTION 13**
What is the required height for receptacle outlets above the floor in a residential dwelling?
A) 12 inches
B) 15 inches
C) 18 inches
D) No specific height requirement
**Answer: D**
, **Rationale:** The NEC does not specify a required height for receptacles, though 15-18 inches is
common practice.
---
**QUESTION 14**
The grounding electrode system for a residential structure must include which of the following?
A) Metal water pipe only
B) Metal water pipe and one additional electrode
C) Two ground rods only
D) Concrete-encased electrode only
**Answer: B**
**Rationale:** NEC 250.50 requires all available grounding electrodes to be bonded together.
---
**QUESTION 15**
What is the minimum size of service entrance conductors for a 150-ampere residential service using
copper?
A) 4 AWG
B) 2 AWG
C) 1 AWG
D) 1/0 AWG
**Answer: C**
**Rationale:** NEC Table 310.15(B)(16) specifies 1 AWG copper for 150-ampere service.
---
**QUESTION 16**
When installing conduit, the radius of the curve of the inner edge of the bend must not be less than:
A) 4 times the diameter of the conduit
B) 6 times the diameter of the conduit
C) 8 times the diameter of the conduit
D) 10 times the diameter of the conduit
**Answer: B**
**Rationale:** NEC 346.11 requires a minimum bending radius of 6 times the conduit diameter.
---
**QUESTION 17**
What is the maximum distance that electrical boxes can be set back from the finished surface?
A) 1/4 inch
B) 1/2 inch
C) 3/4 inch
D) 1 inch
**Answer: A**
**Rationale:** NEC 314.20 requires boxes to be flush with or within 1/4 inch of the finished surface.
---
**QUESTION 18**
Which of the following wiring methods is permitted for use in a wet location?
A) NM cable
B) UF cable
C) AC cable
D) Romex without outer jacket
**Answer: B**
#
CERTIFICATION EXAM - 200
COMPLETE PRACTICE QUESTIONS
## SECTION 1: NEC CODE & INSTALLATION (Questions 1-50)
---
**QUESTION 1**
What is the required maximum spacing between receptacles along a residential kitchen countertop
according to the National Electrical Code?
A) No more than 4 feet apart
B) No more than 6 feet apart
C) No more than 8 feet apart
D) No more than 12 feet apart
**Answer: D**
**Rationale:** NEC 210.52(C)(1) requires receptacles be placed so no point along the countertop is
more than 24 inches from a receptacle, translating to maximum 12-foot spacing between receptacles.
---
**QUESTION 2**
Electrical metallic tubing (EMT) connections must be which of the following according to code
requirements?
A) Painted for corrosion resistance only
B) Mechanically secure and electrically continuous
C) Installed without grounding connections
D) Sealed with combustible adhesives
**Answer: B**
**Rationale:** EMT fittings must ensure both mechanical stability and electrical continuity for safety
and proper grounding.
---
**QUESTION 3**
In a residential dwelling, what is the minimum size of a grounding electrode conductor for a 200-
ampere service using copper wire?
A) 6 AWG
B) 4 AWG
C) 2 AWG
D) 1/0 AWG
**Answer: B**
**Rationale:** NEC Table 250.66 specifies 4 AWG copper for a 200-ampere service grounding
electrode conductor.
---
**QUESTION 4**
Which of the following is a permitted use for a 6 AWG copper grounding electrode conductor in an
electrical system?
A) Connecting a service disconnect to the neutral bar
B) Bonding a metal water pipe to the grounding electrode system
C) Carrying unbalanced load current in a multi-wire branch circuit
,D) Supplying power to a feeder circuit
**Answer: B**
**Rationale:** A grounding electrode conductor may be used to bond metal water piping to the
grounding electrode system.
---
**QUESTION 5**
The NEC requires that the service disconnect be installed within how many feet of the point where
service conductors enter the building?
A) 3 feet
B) 6 feet
C) 12 feet
D) 18 feet
**Answer: B**
**Rationale:** NEC 230.70(A) requires the service disconnect to be installed within 6 feet of the
service entrance point.
---
**QUESTION 6**
When installing NM-B (Romex) cable in a residential structure, what is the maximum distance
between support staples?
A) 3 feet
B) 4.5 feet
C) 6 feet
D) 8 feet
**Answer: B**
**Rationale:** NEC 334.30 requires NM cable to be supported at intervals not exceeding 4.5 feet.
---
**QUESTION 7**
What is the minimum size of a grounding electrode conductor for a 100-ampere service using copper
wire?
A) 8 AWG
B) 6 AWG
C) 4 AWG
D) 2 AWG
**Answer: B**
**Rationale:** NEC Table 250.66 indicates a 6 AWG copper grounding electrode conductor for a 100-
ampere service.
---
**QUESTION 8**
For a lighting circuit supplying 12 amperes of continuous load, what is the minimum breaker size
required?
A) 15 amperes
B) 20 amperes
C) 25 amperes
D) 30 amperes
**Answer: B**
**Rationale:** Continuous loads must be sized at 125 percent: 12 amperes times 1.25 equals 15
amperes, so the next standard breaker size is 20 amperes.
---
,**QUESTION 9**
What is the minimum burial depth required for direct burial cables in residential applications?
A) 12 inches
B) 18 inches
C) 24 inches
D) 36 inches
**Answer: C**
**Rationale:** NEC Table 300.5 requires direct burial cables to be buried at least 24 inches deep.
---
**QUESTION 10**
According to NEC, how many branch circuits are required for a residential kitchen?
A) One circuit for all kitchen receptacles
B) At least two small-appliance branch circuits
C) One circuit for each appliance
D) No specific requirement
**Answer: B**
**Rationale:** NEC 210.52(B) requires at least two 20-ampere small-appliance branch circuits for
kitchen receptacles.
---
**QUESTION 11**
What is the maximum number of conductors permitted in a 4-inch square box with a depth of 2-1/8
inches using 14 AWG wire?
A) 6 conductors
B) 8 conductors
C) 10 conductors
D) 12 conductors
**Answer: C**
**Rationale:** NEC Table 314.16(A) specifies the maximum conductor fill based on box volume and
wire size.
---
**QUESTION 12**
Which type of conduit is approved for use in concrete slabs on grade according to NEC?
A) EMT only
B) PVC Schedule 40 or 80
C) Flexible metal conduit
D) Liquidtight flexible nonmetallic conduit
**Answer: B**
**Rationale:** PVC Schedule 40 and 80 are approved for direct burial and concrete encasement
applications.
---
**QUESTION 13**
What is the required height for receptacle outlets above the floor in a residential dwelling?
A) 12 inches
B) 15 inches
C) 18 inches
D) No specific height requirement
**Answer: D**
, **Rationale:** The NEC does not specify a required height for receptacles, though 15-18 inches is
common practice.
---
**QUESTION 14**
The grounding electrode system for a residential structure must include which of the following?
A) Metal water pipe only
B) Metal water pipe and one additional electrode
C) Two ground rods only
D) Concrete-encased electrode only
**Answer: B**
**Rationale:** NEC 250.50 requires all available grounding electrodes to be bonded together.
---
**QUESTION 15**
What is the minimum size of service entrance conductors for a 150-ampere residential service using
copper?
A) 4 AWG
B) 2 AWG
C) 1 AWG
D) 1/0 AWG
**Answer: C**
**Rationale:** NEC Table 310.15(B)(16) specifies 1 AWG copper for 150-ampere service.
---
**QUESTION 16**
When installing conduit, the radius of the curve of the inner edge of the bend must not be less than:
A) 4 times the diameter of the conduit
B) 6 times the diameter of the conduit
C) 8 times the diameter of the conduit
D) 10 times the diameter of the conduit
**Answer: B**
**Rationale:** NEC 346.11 requires a minimum bending radius of 6 times the conduit diameter.
---
**QUESTION 17**
What is the maximum distance that electrical boxes can be set back from the finished surface?
A) 1/4 inch
B) 1/2 inch
C) 3/4 inch
D) 1 inch
**Answer: A**
**Rationale:** NEC 314.20 requires boxes to be flush with or within 1/4 inch of the finished surface.
---
**QUESTION 18**
Which of the following wiring methods is permitted for use in a wet location?
A) NM cable
B) UF cable
C) AC cable
D) Romex without outer jacket
**Answer: B**
