Florida Electrical Journeyman Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. What is the maximum voltage allowed for general-use receptacles in a
dwelling unit?
120 volts
Standard household receptacles in Florida and per NEC are rated for
120V for general-use outlets.
2. What is the minimum conductor size for a 20-ampere branch circuit
supplying general lighting and receptacles?
12 AWG
NEC requires 12 AWG copper conductors for 20-amp circuits to
handle the load safely.
3. How far apart should receptacles be installed along a wall in a dwelling
unit?
, No more than 12 feet apart
NEC 210.52(A) mandates that receptacles be spaced so no point
along the wall is more than 6 feet from an outlet, effectively 12 feet
apart maximum.
4. Which type of grounding is required for all electrical services in
Florida?
Grounding electrode system to earth
All services must connect to a grounding electrode, such as a ground
rod or metal water pipe, to protect against lightning and faults.
5. What is the maximum number of conductors allowed in a standard
1/2-inch electrical box for a 15-ampere circuit?
8 conductors
NEC box fill calculations limit the number of wires and devices to
prevent overheating and maintain safety.
6. What is the primary purpose of a GFCI (Ground-Fault Circuit
Interrupter)?
Protect against electrical shock
GFCIs detect differences in current between hot and neutral and trip
the circuit to prevent shocks.
7. Where are GFCI outlets required in a dwelling unit?
Bathrooms, kitchens, garages, and outdoors
NEC requires GFCI protection in locations with increased risk of water
exposure.
,8. What is the typical color for a grounded conductor in a 120/240V
single-phase system?
White
White or gray conductors are designated as neutral per NEC.
9. What is the maximum overcurrent protection for a 14 AWG copper
conductor?
15 amperes
14 AWG conductors are rated for 15A maximum to prevent
overheating.
10. Which type of wire is commonly used for indoor residential
wiring?
Nonmetallic-sheathed cable (NM-B, Romex)
NM-B is widely used in dry indoor locations for branch circuits.
11. What is the minimum depth for burying a 120V underground
branch circuit using nonmetallic-sheathed cable?
24 inches
NEC specifies burial depths to protect underground wiring from
physical damage.
12. What device is used to automatically shut off power during an
overcurrent condition?
Circuit breaker
Circuit breakers interrupt current flow to protect conductors and
equipment from overheating.
, 13. Which NEC article covers residential branch circuits?
Article 210
Article 210 of the NEC details requirements for branch circuits
including outlets, load calculations, and wiring methods.
14. What is the minimum service size for a single-family dwelling?
100 amperes
Florida NEC requires at least a 100A service to safely handle typical
household loads.
15. How is an ungrounded conductor identified in residential wiring?
Black, red, or other color not white/green
Hot conductors must not be white or green; these are reserved for
neutral and ground.
16. What is the maximum number of receptacles on a 15-ampere
branch circuit?
10 receptacles
Typical NEC practice limits the number of standard receptacles to
avoid overloading a 15A circuit.
17. How often must arc-fault circuit interrupters (AFCIs) be installed
in dwelling unit bedrooms?
All new bedroom branch circuits
AFCIs are required to reduce the risk of fires caused by arc faults in
bedrooms.
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. What is the maximum voltage allowed for general-use receptacles in a
dwelling unit?
120 volts
Standard household receptacles in Florida and per NEC are rated for
120V for general-use outlets.
2. What is the minimum conductor size for a 20-ampere branch circuit
supplying general lighting and receptacles?
12 AWG
NEC requires 12 AWG copper conductors for 20-amp circuits to
handle the load safely.
3. How far apart should receptacles be installed along a wall in a dwelling
unit?
, No more than 12 feet apart
NEC 210.52(A) mandates that receptacles be spaced so no point
along the wall is more than 6 feet from an outlet, effectively 12 feet
apart maximum.
4. Which type of grounding is required for all electrical services in
Florida?
Grounding electrode system to earth
All services must connect to a grounding electrode, such as a ground
rod or metal water pipe, to protect against lightning and faults.
5. What is the maximum number of conductors allowed in a standard
1/2-inch electrical box for a 15-ampere circuit?
8 conductors
NEC box fill calculations limit the number of wires and devices to
prevent overheating and maintain safety.
6. What is the primary purpose of a GFCI (Ground-Fault Circuit
Interrupter)?
Protect against electrical shock
GFCIs detect differences in current between hot and neutral and trip
the circuit to prevent shocks.
7. Where are GFCI outlets required in a dwelling unit?
Bathrooms, kitchens, garages, and outdoors
NEC requires GFCI protection in locations with increased risk of water
exposure.
,8. What is the typical color for a grounded conductor in a 120/240V
single-phase system?
White
White or gray conductors are designated as neutral per NEC.
9. What is the maximum overcurrent protection for a 14 AWG copper
conductor?
15 amperes
14 AWG conductors are rated for 15A maximum to prevent
overheating.
10. Which type of wire is commonly used for indoor residential
wiring?
Nonmetallic-sheathed cable (NM-B, Romex)
NM-B is widely used in dry indoor locations for branch circuits.
11. What is the minimum depth for burying a 120V underground
branch circuit using nonmetallic-sheathed cable?
24 inches
NEC specifies burial depths to protect underground wiring from
physical damage.
12. What device is used to automatically shut off power during an
overcurrent condition?
Circuit breaker
Circuit breakers interrupt current flow to protect conductors and
equipment from overheating.
, 13. Which NEC article covers residential branch circuits?
Article 210
Article 210 of the NEC details requirements for branch circuits
including outlets, load calculations, and wiring methods.
14. What is the minimum service size for a single-family dwelling?
100 amperes
Florida NEC requires at least a 100A service to safely handle typical
household loads.
15. How is an ungrounded conductor identified in residential wiring?
Black, red, or other color not white/green
Hot conductors must not be white or green; these are reserved for
neutral and ground.
16. What is the maximum number of receptacles on a 15-ampere
branch circuit?
10 receptacles
Typical NEC practice limits the number of standard receptacles to
avoid overloading a 15A circuit.
17. How often must arc-fault circuit interrupters (AFCIs) be installed
in dwelling unit bedrooms?
All new bedroom branch circuits
AFCIs are required to reduce the risk of fires caused by arc faults in
bedrooms.
