ICC Residential Electrical Study Questions
E1 questions and answers 2025\2026 A+
Grade
Residential Electrical Scope E3401.2
- correct answer Limited to 120/240 volt, 0-400 ampere, single phase systems in one and two family
dwellings and accessory structures.
Residential Electrical Limitations E3401.3
- correct answer Does not cover Installations, including associated lighting, under the exclusive control
of communications utilities and electric utilities, or services over 400 amperes.
Integrity of electrical equipment E3404.7
- correct answer Internal parts of electrical equipment, including busbars, wiring terminals, insulators,
and other surfaces shall not be damaged or contaminated by foreign materials such as PAINT, plaster,
cleaners, abrasives, and corrosive residues.
Working clearances E3405
- correct answer 36 inches deep, 30 inches wide, and floor to 6.5 feet with minimum 90 degree opening
doors
Panelboards and Service Equipment Locations 3405.5
- correct answer Shall not be located in bathrooms, toilet rooms, clothes closets, or over the steps of a
stairway.
Minimum size of conductors E3406
- correct answer 14 AWG copper and 12 AWG aluminum or copper clad aluminum.
Length of conductor for splice or termination 3406.11.3
- correct answer minimum 6 inches of free conductor or 3 inches outside of each opening.
, Tightening torque values E3406.12
- correct answer are provided by the manufacturer to be achieved by approved means (torque wrench,
torque screwdriver) indicated in inch pounds.
Methods not permitted for connections E3406.14.2
- correct answer connection devices or fittings that depend soley on solder shall not be used.
Grounded Conductor Identification E3407
- correct answer Neutrals: continuous white or gray outer finish or three continuous white or gray
stripes along it or at terminations, on any other sheathing color except green insulation.
Festoon Lighting NEC 225.6
- correct answer A sting of outdoor lights that are suspended between 2 points. Shall not be smaller
than 12 AWG unless the conductors are supported by messenger wires and across spans not more than
40 feet without messenger wires.
Ceiling-supported paddle fans shall be supported _____ of the outlet box
- correct answer independently
E4101.6
Above-ground service-entrance cables subject to physical damage shall be protected by Schedule ___
PVC conduit
- correct answer Schedule 80 or rigid metal conduit, intermediate conduit, electrical metallic tubing, or
other approved means.
E3605.5
Conductors in NM cable assemblies shall be rated at ___degrees Celsius
- correct answer 90
E3705.4
Underground service laterals that are not encased in concrete and that are buried 18 inches or more
below grade shall have their location identified by a ________________ _____________.
- correct answer warning ribbon
E3803.2
E1 questions and answers 2025\2026 A+
Grade
Residential Electrical Scope E3401.2
- correct answer Limited to 120/240 volt, 0-400 ampere, single phase systems in one and two family
dwellings and accessory structures.
Residential Electrical Limitations E3401.3
- correct answer Does not cover Installations, including associated lighting, under the exclusive control
of communications utilities and electric utilities, or services over 400 amperes.
Integrity of electrical equipment E3404.7
- correct answer Internal parts of electrical equipment, including busbars, wiring terminals, insulators,
and other surfaces shall not be damaged or contaminated by foreign materials such as PAINT, plaster,
cleaners, abrasives, and corrosive residues.
Working clearances E3405
- correct answer 36 inches deep, 30 inches wide, and floor to 6.5 feet with minimum 90 degree opening
doors
Panelboards and Service Equipment Locations 3405.5
- correct answer Shall not be located in bathrooms, toilet rooms, clothes closets, or over the steps of a
stairway.
Minimum size of conductors E3406
- correct answer 14 AWG copper and 12 AWG aluminum or copper clad aluminum.
Length of conductor for splice or termination 3406.11.3
- correct answer minimum 6 inches of free conductor or 3 inches outside of each opening.
, Tightening torque values E3406.12
- correct answer are provided by the manufacturer to be achieved by approved means (torque wrench,
torque screwdriver) indicated in inch pounds.
Methods not permitted for connections E3406.14.2
- correct answer connection devices or fittings that depend soley on solder shall not be used.
Grounded Conductor Identification E3407
- correct answer Neutrals: continuous white or gray outer finish or three continuous white or gray
stripes along it or at terminations, on any other sheathing color except green insulation.
Festoon Lighting NEC 225.6
- correct answer A sting of outdoor lights that are suspended between 2 points. Shall not be smaller
than 12 AWG unless the conductors are supported by messenger wires and across spans not more than
40 feet without messenger wires.
Ceiling-supported paddle fans shall be supported _____ of the outlet box
- correct answer independently
E4101.6
Above-ground service-entrance cables subject to physical damage shall be protected by Schedule ___
PVC conduit
- correct answer Schedule 80 or rigid metal conduit, intermediate conduit, electrical metallic tubing, or
other approved means.
E3605.5
Conductors in NM cable assemblies shall be rated at ___degrees Celsius
- correct answer 90
E3705.4
Underground service laterals that are not encased in concrete and that are buried 18 inches or more
below grade shall have their location identified by a ________________ _____________.
- correct answer warning ribbon
E3803.2
