Electrical Code Calculations, Level I (1-4) EXAM LATEST
2026-2027 QUESTIONS AND 100% Verified ANSWERS
Control circuits are considered to be current-carrying conductors according to the provisions of Table 310.15(C)(1).
- answer>>b. False
310.15(C)(1)
The neutral conductors of a 4-wire, 3-phase wye circuit, where most of the load is nonlinear and connected to ? ,
are considered to be current-carrying conductors according to the provisions of Table 310.15(C)(1). - answer>>b.
fluorescent lighting
310.15(E)(3)
The neutral conductor of a 2-wire, single-phase circuit supplying a household refrigerator is considered to be a
current-carrying conductor according to the provisions of Table 310.15(C)(1). - answer>>a. True
310.15(E)(1)
Determine the ampacity of three 8 AWG THWN copper conductors installed in EMT, in an ambient temperature of
30°C. All of the conductors are current-carrying conductors. - answer>>d. 50 A
Table 310.16
Determine the ampacity of three 8 AWG THWN copper conductors installed in EMT in an ambient temperature of
40°C. All of the conductors are current-carrying conductors. Calculate to the nearest ampere. - answer>>44 A
Three 1/0 AWG XHHW-2 aluminum conductors are installed in a rigid metal conduit, Type RMC, in an ambient
temperature of 105°F. All of the conductors are current-carrying conductors. Determine the ampacity of the
current-carrying conductors. Calculate to the nearest ampere. - answer>>117 A
A 3-conductor 8 AWG copper Type MC cable is installed in an area with an ambient temperature of 96°F. The
conductors within the cable assembly have THHN insulation, and all three conductors are considered current-
carrying conductors. Determine the ampacity of the current-carrying conductors in this application. Calculate to
the nearest ampere. - answer>>50 A
, Determine the ampacity of six 8 AWG THW copper conductors installed in EMT in an ambient temperature of
30°C. All of the conductors are current-carrying conductors. Calculate to the nearest ampere. - answer>>40 A
Twenty 10 AWG THWN aluminum current-carrying conductors are installed in the same conduit in an ambient
temperature of 30°C. Determine the ampacity of each of the current-carrying conductors. Calculate to the nearest
ampere. - answer>>15 A
Six 4 AWG THW copper conductors are installed in the same raceway in an ambient temperature of 30°C. All of the
conductors are current-carrying conductors. Determine the ampacity of the 4 AWG current-carrying conductors.
Calculate to the nearest ampere. - answer>>68 A
Twelve 1 AWG THWN copper conductors are installed in a three-inch EMT in an ambient temperature of 101°F. All
of the conductors are current-carrying conductors. Determine the ampacity of the 1 AWG THWN conductors for
this application. Calculate to the nearest ampere. - answer>>57 A
Nine 3/0 AWG THHN aluminum conductors are installed in a three-inch RMC in an area with an ambient
temperature of 35°C. Only six of the conductors are current-carrying conductors. Determine the ampacity of the
3/0 AWG conductors for this application. Calculate to the nearest ampere. - answer>>134 A
Twelve 12 AWG THHN copper conductors are installed in a one-inch EMT in an ambient temperature of 32°C.
These twelve conductors are comprised of three 4-wire multiwire branch circuits. The multiwire branch circuits
are supplied by a 4-wire, 3-phase, wye-connected system. The neutral conductor in each of these multiwire
branch circuits carries only the unbalanced current from the other conductors in each respective multiwire branch
circuit. Determine the ampacity of each of the 12 AWG conductors. Calculate to the nearest ampere. - answer>>20
A
Twelve 12 AWG THHN copper conductors are installed in a one-inch EMT in an ambient temperature of 32°C.
These twelve conductors are comprised of three 4-wire multiwire branch circuits. The multiwire branch circuits
are supplied by a 4-wire, 3-phase, wye-connected system. The major portion of the load for each multiwire branch
circuit consists of nonlinear loads. Determine the ampacity of each of the 12 AWG conductors. Calculate to the
nearest ampere. - answer>>14 A
Two "A" phase conductors, two "B" phase conductors, and two neutrals are installed as two 3-wire multiwire
branch circuits of a 120/208-volt system. They are installed in EMT in an ambient temperature of 30°C. The
conductors are 10 AWG THHN copper. What is the ampacity of each of the current-carrying conductors? Calculate
to the nearest ampere. - answer>>32 A
2026-2027 QUESTIONS AND 100% Verified ANSWERS
Control circuits are considered to be current-carrying conductors according to the provisions of Table 310.15(C)(1).
- answer>>b. False
310.15(C)(1)
The neutral conductors of a 4-wire, 3-phase wye circuit, where most of the load is nonlinear and connected to ? ,
are considered to be current-carrying conductors according to the provisions of Table 310.15(C)(1). - answer>>b.
fluorescent lighting
310.15(E)(3)
The neutral conductor of a 2-wire, single-phase circuit supplying a household refrigerator is considered to be a
current-carrying conductor according to the provisions of Table 310.15(C)(1). - answer>>a. True
310.15(E)(1)
Determine the ampacity of three 8 AWG THWN copper conductors installed in EMT, in an ambient temperature of
30°C. All of the conductors are current-carrying conductors. - answer>>d. 50 A
Table 310.16
Determine the ampacity of three 8 AWG THWN copper conductors installed in EMT in an ambient temperature of
40°C. All of the conductors are current-carrying conductors. Calculate to the nearest ampere. - answer>>44 A
Three 1/0 AWG XHHW-2 aluminum conductors are installed in a rigid metal conduit, Type RMC, in an ambient
temperature of 105°F. All of the conductors are current-carrying conductors. Determine the ampacity of the
current-carrying conductors. Calculate to the nearest ampere. - answer>>117 A
A 3-conductor 8 AWG copper Type MC cable is installed in an area with an ambient temperature of 96°F. The
conductors within the cable assembly have THHN insulation, and all three conductors are considered current-
carrying conductors. Determine the ampacity of the current-carrying conductors in this application. Calculate to
the nearest ampere. - answer>>50 A
, Determine the ampacity of six 8 AWG THW copper conductors installed in EMT in an ambient temperature of
30°C. All of the conductors are current-carrying conductors. Calculate to the nearest ampere. - answer>>40 A
Twenty 10 AWG THWN aluminum current-carrying conductors are installed in the same conduit in an ambient
temperature of 30°C. Determine the ampacity of each of the current-carrying conductors. Calculate to the nearest
ampere. - answer>>15 A
Six 4 AWG THW copper conductors are installed in the same raceway in an ambient temperature of 30°C. All of the
conductors are current-carrying conductors. Determine the ampacity of the 4 AWG current-carrying conductors.
Calculate to the nearest ampere. - answer>>68 A
Twelve 1 AWG THWN copper conductors are installed in a three-inch EMT in an ambient temperature of 101°F. All
of the conductors are current-carrying conductors. Determine the ampacity of the 1 AWG THWN conductors for
this application. Calculate to the nearest ampere. - answer>>57 A
Nine 3/0 AWG THHN aluminum conductors are installed in a three-inch RMC in an area with an ambient
temperature of 35°C. Only six of the conductors are current-carrying conductors. Determine the ampacity of the
3/0 AWG conductors for this application. Calculate to the nearest ampere. - answer>>134 A
Twelve 12 AWG THHN copper conductors are installed in a one-inch EMT in an ambient temperature of 32°C.
These twelve conductors are comprised of three 4-wire multiwire branch circuits. The multiwire branch circuits
are supplied by a 4-wire, 3-phase, wye-connected system. The neutral conductor in each of these multiwire
branch circuits carries only the unbalanced current from the other conductors in each respective multiwire branch
circuit. Determine the ampacity of each of the 12 AWG conductors. Calculate to the nearest ampere. - answer>>20
A
Twelve 12 AWG THHN copper conductors are installed in a one-inch EMT in an ambient temperature of 32°C.
These twelve conductors are comprised of three 4-wire multiwire branch circuits. The multiwire branch circuits
are supplied by a 4-wire, 3-phase, wye-connected system. The major portion of the load for each multiwire branch
circuit consists of nonlinear loads. Determine the ampacity of each of the 12 AWG conductors. Calculate to the
nearest ampere. - answer>>14 A
Two "A" phase conductors, two "B" phase conductors, and two neutrals are installed as two 3-wire multiwire
branch circuits of a 120/208-volt system. They are installed in EMT in an ambient temperature of 30°C. The
conductors are 10 AWG THHN copper. What is the ampacity of each of the current-carrying conductors? Calculate
to the nearest ampere. - answer>>32 A
