FLORIDA REGISTERED ELECTRICAL
CONTRACTOR EXAM NEWEST 2026
EXAM COMPLETE 100 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
1. What is the primary purpose of a grounding system in an electrical
installation?
A) To ensure proper insulation of conductors
B) To provide a path for fault currents to flow safely to the earth
C) To enhance the efficiency of electrical circuits
D) To prevent the overcurrent of circuits
Answer: B) To provide a path for fault currents to flow safely to the earth
Rationale: The primary function of a grounding system is to ensure that fault
currents have a safe path to the earth, helping to protect equipment and
individuals from electrical shock hazards.
2. What is the maximum allowable voltage between conductors in a 120/240V
residential electrical system?
A) 240V
B) 120V
C) 208V
D) 220V
Answer: A) 240V
Rationale: In a typical 120/240V system, the maximum voltage between the two
"hot" conductors is 240V.
3. How many wires are typically found in a 12/2 Romex cable?
,A) 2 wires
B) 3 wires
C) 4 wires
D) 5 wires
Answer: B) 3 wires
Rationale: A 12/2 Romex cable contains three conductors: a black hot wire, a
white neutral wire, and a bare ground wire.
4. Which of the following is considered the best conductor of electricity?
A) Copper
B) Aluminum
C) Steel
D) Gold
Answer: A) Copper
Rationale: Copper is the most commonly used conductor for electrical wiring due
to its high conductivity and flexibility.
5. What is the purpose of a circuit breaker?
A) To regulate the voltage in a circuit
B) To provide protection against overcurrent
C) To provide a path for current to flow
D) To increase the current capacity of a circuit
Answer: B) To provide protection against overcurrent
Rationale: A circuit breaker automatically disconnects a circuit when the current
exceeds a safe level, preventing damage to the wiring and electrical devices.
6. What is the standard voltage for most residential electrical systems in
Florida?
A) 120V
B) 240V
C) 480V
D) 208V
,Answer: A) 120V
Rationale: The standard voltage for most residential electrical systems is 120V for
single-phase power and 240V for two-phase power.
7. How far apart should electrical outlets be placed in a residential living
room?
A) 10 feet
B) 12 feet
C) 8 feet
D) 6 feet
Answer: B) 12 feet
Rationale: According to the National Electrical Code (NEC), outlets in a living room
should be placed no further than 12 feet apart to ensure adequate access to
power.
8. What does NEC stand for?
A) National Engineering Code
B) National Electric Code
C) National Electrical Certification
D) National Electric Certification
Answer: B) National Electric Code
Rationale: NEC stands for the National Electrical Code, which provides the
standard for the safe installation of electrical wiring and equipment in the U.S.
9. What is the purpose of a GFCI outlet?
A) To prevent short circuits
B) To prevent ground faults and reduce shock hazards
C) To reduce energy consumption
D) To increase current capacity
Answer: B) To prevent ground faults and reduce shock hazards
Rationale: A Ground Fault Circuit Interrupter (GFCI) outlet detects ground faults
and shuts off power to prevent electric shock, especially in wet or damp locations.
, 10.What is the minimum wire size for a 20-amp circuit in residential wiring?
A) 14 AWG
B) 12 AWG
C) 10 AWG
D) 8 AWG
Answer: B) 12 AWG
Rationale: For a 20-amp circuit, the minimum recommended wire size is 12 AWG
according to NEC standards.
11.What type of wire is commonly used for outdoor installations?
A) NM wire
B) UF wire
C) THHN wire
D) Romex wire
Answer: B) UF wire
Rationale: Underground Feeder (UF) wire is specifically designed for outdoor and
underground installations, offering extra protection against moisture and physical
damage.
12.What is the typical purpose of a panelboard?
A) To distribute electricity to various circuits
B) To increase voltage in a system
C) To store excess electricity
D) To protect against electrical surges
Answer: A) To distribute electricity to various circuits
Rationale: A panelboard, or breaker panel, is used to distribute electrical power
from the main service panel to the branch circuits within the building.
13.What does the term "ampacity" refer to?
A) The total amount of voltage in a circuit
B) The maximum amount of current a conductor can safely carry
CONTRACTOR EXAM NEWEST 2026
EXAM COMPLETE 100 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
1. What is the primary purpose of a grounding system in an electrical
installation?
A) To ensure proper insulation of conductors
B) To provide a path for fault currents to flow safely to the earth
C) To enhance the efficiency of electrical circuits
D) To prevent the overcurrent of circuits
Answer: B) To provide a path for fault currents to flow safely to the earth
Rationale: The primary function of a grounding system is to ensure that fault
currents have a safe path to the earth, helping to protect equipment and
individuals from electrical shock hazards.
2. What is the maximum allowable voltage between conductors in a 120/240V
residential electrical system?
A) 240V
B) 120V
C) 208V
D) 220V
Answer: A) 240V
Rationale: In a typical 120/240V system, the maximum voltage between the two
"hot" conductors is 240V.
3. How many wires are typically found in a 12/2 Romex cable?
,A) 2 wires
B) 3 wires
C) 4 wires
D) 5 wires
Answer: B) 3 wires
Rationale: A 12/2 Romex cable contains three conductors: a black hot wire, a
white neutral wire, and a bare ground wire.
4. Which of the following is considered the best conductor of electricity?
A) Copper
B) Aluminum
C) Steel
D) Gold
Answer: A) Copper
Rationale: Copper is the most commonly used conductor for electrical wiring due
to its high conductivity and flexibility.
5. What is the purpose of a circuit breaker?
A) To regulate the voltage in a circuit
B) To provide protection against overcurrent
C) To provide a path for current to flow
D) To increase the current capacity of a circuit
Answer: B) To provide protection against overcurrent
Rationale: A circuit breaker automatically disconnects a circuit when the current
exceeds a safe level, preventing damage to the wiring and electrical devices.
6. What is the standard voltage for most residential electrical systems in
Florida?
A) 120V
B) 240V
C) 480V
D) 208V
,Answer: A) 120V
Rationale: The standard voltage for most residential electrical systems is 120V for
single-phase power and 240V for two-phase power.
7. How far apart should electrical outlets be placed in a residential living
room?
A) 10 feet
B) 12 feet
C) 8 feet
D) 6 feet
Answer: B) 12 feet
Rationale: According to the National Electrical Code (NEC), outlets in a living room
should be placed no further than 12 feet apart to ensure adequate access to
power.
8. What does NEC stand for?
A) National Engineering Code
B) National Electric Code
C) National Electrical Certification
D) National Electric Certification
Answer: B) National Electric Code
Rationale: NEC stands for the National Electrical Code, which provides the
standard for the safe installation of electrical wiring and equipment in the U.S.
9. What is the purpose of a GFCI outlet?
A) To prevent short circuits
B) To prevent ground faults and reduce shock hazards
C) To reduce energy consumption
D) To increase current capacity
Answer: B) To prevent ground faults and reduce shock hazards
Rationale: A Ground Fault Circuit Interrupter (GFCI) outlet detects ground faults
and shuts off power to prevent electric shock, especially in wet or damp locations.
, 10.What is the minimum wire size for a 20-amp circuit in residential wiring?
A) 14 AWG
B) 12 AWG
C) 10 AWG
D) 8 AWG
Answer: B) 12 AWG
Rationale: For a 20-amp circuit, the minimum recommended wire size is 12 AWG
according to NEC standards.
11.What type of wire is commonly used for outdoor installations?
A) NM wire
B) UF wire
C) THHN wire
D) Romex wire
Answer: B) UF wire
Rationale: Underground Feeder (UF) wire is specifically designed for outdoor and
underground installations, offering extra protection against moisture and physical
damage.
12.What is the typical purpose of a panelboard?
A) To distribute electricity to various circuits
B) To increase voltage in a system
C) To store excess electricity
D) To protect against electrical surges
Answer: A) To distribute electricity to various circuits
Rationale: A panelboard, or breaker panel, is used to distribute electrical power
from the main service panel to the branch circuits within the building.
13.What does the term "ampacity" refer to?
A) The total amount of voltage in a circuit
B) The maximum amount of current a conductor can safely carry
