1|Page
ICC Residential Electrical 2026 Study
Questions E1 and Answers with Complete
Solutions UPDATED!!!
Residential Electrical Scope E3401.2 - 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 - 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 - 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 - ANSWER 36 inches deep, 30 inches
wide, and floor to 6.5 feet with minimum 90 degree opening
doors
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Panelboards and Service Equipment Locations 3405.5 - ANSWER
Shall not be located in bathrooms, toilet rooms, clothes closets,
or over the steps of a stairway.
Minimum size of conductors E3406 - ANSWER 14 AWG copper
and 12 AWG aluminum or copper clad aluminum.
Length of conductor for splice or termination 3406.11.3 -
ANSWER minimum 6 inches of free conductor or 3 inches
outside of each opening.
Tightening torque values E3406.12 - 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 - ANSWER
connection devices or fittings that depend soley on solder shall
not be used.
Grounded Conductor Identification E3407 - ANSWER Neutrals:
continuous white or gray outer finish or three continuous white
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or gray stripes along it or at terminations, on any other
sheathing color except green insulation.
Festoon Lighting NEC 225.6 - 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 - ANSWER independently
E4101.6
Above-ground service-entrance cables subject to physical
damage shall be protected by Schedule ___ PVC conduit -
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 - ANSWER 90
E3705.4
ICC Residential Electrical 2026 Study
Questions E1 and Answers with Complete
Solutions UPDATED!!!
Residential Electrical Scope E3401.2 - 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 - 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 - 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 - ANSWER 36 inches deep, 30 inches
wide, and floor to 6.5 feet with minimum 90 degree opening
doors
,2|Page
Panelboards and Service Equipment Locations 3405.5 - ANSWER
Shall not be located in bathrooms, toilet rooms, clothes closets,
or over the steps of a stairway.
Minimum size of conductors E3406 - ANSWER 14 AWG copper
and 12 AWG aluminum or copper clad aluminum.
Length of conductor for splice or termination 3406.11.3 -
ANSWER minimum 6 inches of free conductor or 3 inches
outside of each opening.
Tightening torque values E3406.12 - 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 - ANSWER
connection devices or fittings that depend soley on solder shall
not be used.
Grounded Conductor Identification E3407 - ANSWER Neutrals:
continuous white or gray outer finish or three continuous white
, 3|Page
or gray stripes along it or at terminations, on any other
sheathing color except green insulation.
Festoon Lighting NEC 225.6 - 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 - ANSWER independently
E4101.6
Above-ground service-entrance cables subject to physical
damage shall be protected by Schedule ___ PVC conduit -
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 - ANSWER 90
E3705.4
