CALFORNIA C10 ELECTRICAL EVALUATION EXAMS
2025/2026 QUESTIONS WITH ANSWERS RATED A+
✔✔100. _______-gauge wire is required for stoves. - ✔✔8
✔✔101. Electric heaters, washing machines and central vacuums are generally on
dedicated circuits _______. - ✔✔Because they use so much electricity
✔✔102. No more than _______ outlets and light should be on a single branch circuit. -
✔✔12
✔✔103. Cables should be _______ where they come into the panel. - ✔✔Clamped
✔✔104. _______ should be stripped of wires inside the panel. - ✔✔Sheathing
✔✔105. Metallic shielding on shielded cable must be stripped back _______ in. at all
terminations. - ✔✔A minimum of 6
✔✔106. Adequate _______ should be left to allow wires to run around bus bars and not
over or across them. - ✔✔Slack
✔✔107. A simple basic house Load calculation includes estimating the _______. -
✔✔House square footage, large appliances and special loads
✔✔108. Basic load is calculated by adding 75% of the basement floor area to _______.
- ✔✔the total house SF.
✔✔109. The large appliances part of the House Load formula includes such appliances
as _______. - ✔✔stoves
✔✔110. Prior to adding any Special Loads to the calculation to obtain the Total House
Load, the basic load and large appliances totals are _______. - ✔✔subtotaled
✔✔111. Special Loads current load additions are obtained _______. - ✔✔from amps
taken from the manufacturer's label
✔✔112. Lighting loads are based on 3 _______, which includes all small appliances
receptacles. - ✔✔watts per sq. ft.
✔✔113. Fault currents above _______ amp are not likely to occur on 120/240-volt
single-phase systems. - ✔✔10,000
, ✔✔114. According to the American Wire Gauge (AWG) system, as wires get bigger,
their numbers _______. - ✔✔get smaller
✔✔115. An AWG 12-gauge wire is _______ than an 8-gauge wire. - ✔✔Smaller
✔✔116. The me t largest size wire after 4/0 AWG is _______. - ✔✔250 MCM
✔✔117. The "MCM" system uses the _______ of the wire as a measurement. -
✔✔cross-sectional area
✔✔118. The largest MCM size wire is _______. - ✔✔600
✔✔119. The largest sized wire used in most houses is _______. - ✔✔4/0 AWG
✔✔120. Feeder wires from the main panel to the subpanel should be protected by
_______. - ✔✔providing fuses at the main panel
✔✔121. Overheating of the subpanel may be s result of bad termination of wires at the
neutrals of _______ circuit points. - ✔✔multi-wire
✔✔122. Electrical fires within the distribution panel are primarily caused by _______. -
✔✔Faulting ground connections, faulty splices in the panel and/or loose connections at
lugs on the bus bars
✔✔123. Insulation may be missing or become split, requiring wire to be replaced, due to
_______. - ✔✔over-tightening terminal screws
✔✔124. Splicing _______ wires at a box along a circuit will result in the smaller wire not
being adequately protected by the fuse sized for the larger wire. - ✔✔different brand
✔✔125. Wires should be run _______ inch(es) away from the face of studs and joists. -
✔✔1-1/4
✔✔126. In commercial installation, _______ is used to protect installed wiring from
being damaged by the steel stud edges. - ✔✔all answers correct
✔✔127. In single-family homes where non-metallic sheathed cable is used _______ are
permitted for use where it passes through the studs. - ✔✔special grommets
✔✔128. Exposed wires should not be attached to the underside of joists in _______. -
✔✔crawlspace ceilings
2025/2026 QUESTIONS WITH ANSWERS RATED A+
✔✔100. _______-gauge wire is required for stoves. - ✔✔8
✔✔101. Electric heaters, washing machines and central vacuums are generally on
dedicated circuits _______. - ✔✔Because they use so much electricity
✔✔102. No more than _______ outlets and light should be on a single branch circuit. -
✔✔12
✔✔103. Cables should be _______ where they come into the panel. - ✔✔Clamped
✔✔104. _______ should be stripped of wires inside the panel. - ✔✔Sheathing
✔✔105. Metallic shielding on shielded cable must be stripped back _______ in. at all
terminations. - ✔✔A minimum of 6
✔✔106. Adequate _______ should be left to allow wires to run around bus bars and not
over or across them. - ✔✔Slack
✔✔107. A simple basic house Load calculation includes estimating the _______. -
✔✔House square footage, large appliances and special loads
✔✔108. Basic load is calculated by adding 75% of the basement floor area to _______.
- ✔✔the total house SF.
✔✔109. The large appliances part of the House Load formula includes such appliances
as _______. - ✔✔stoves
✔✔110. Prior to adding any Special Loads to the calculation to obtain the Total House
Load, the basic load and large appliances totals are _______. - ✔✔subtotaled
✔✔111. Special Loads current load additions are obtained _______. - ✔✔from amps
taken from the manufacturer's label
✔✔112. Lighting loads are based on 3 _______, which includes all small appliances
receptacles. - ✔✔watts per sq. ft.
✔✔113. Fault currents above _______ amp are not likely to occur on 120/240-volt
single-phase systems. - ✔✔10,000
, ✔✔114. According to the American Wire Gauge (AWG) system, as wires get bigger,
their numbers _______. - ✔✔get smaller
✔✔115. An AWG 12-gauge wire is _______ than an 8-gauge wire. - ✔✔Smaller
✔✔116. The me t largest size wire after 4/0 AWG is _______. - ✔✔250 MCM
✔✔117. The "MCM" system uses the _______ of the wire as a measurement. -
✔✔cross-sectional area
✔✔118. The largest MCM size wire is _______. - ✔✔600
✔✔119. The largest sized wire used in most houses is _______. - ✔✔4/0 AWG
✔✔120. Feeder wires from the main panel to the subpanel should be protected by
_______. - ✔✔providing fuses at the main panel
✔✔121. Overheating of the subpanel may be s result of bad termination of wires at the
neutrals of _______ circuit points. - ✔✔multi-wire
✔✔122. Electrical fires within the distribution panel are primarily caused by _______. -
✔✔Faulting ground connections, faulty splices in the panel and/or loose connections at
lugs on the bus bars
✔✔123. Insulation may be missing or become split, requiring wire to be replaced, due to
_______. - ✔✔over-tightening terminal screws
✔✔124. Splicing _______ wires at a box along a circuit will result in the smaller wire not
being adequately protected by the fuse sized for the larger wire. - ✔✔different brand
✔✔125. Wires should be run _______ inch(es) away from the face of studs and joists. -
✔✔1-1/4
✔✔126. In commercial installation, _______ is used to protect installed wiring from
being damaged by the steel stud edges. - ✔✔all answers correct
✔✔127. In single-family homes where non-metallic sheathed cable is used _______ are
permitted for use where it passes through the studs. - ✔✔special grommets
✔✔128. Exposed wires should not be attached to the underside of joists in _______. -
✔✔crawlspace ceilings
