Electrical Level 3 Module 1 Load Calculations and
Branch Feeder Circuits Quiz Actual Exam –
Complete Questions and Answers with Detailed
Rationales – Pass Guaranteed – A+ Graded
Fundamentals of Load Calculations
Q1: According to the National Electrical Code, what is the exact definition of a
continuous load?
A. A load where the maximum current is expected to continue for 1 hour or more
[CORRECT]
B. Any load that runs for more than 30 minutes at a time
C. A load that stays on constantly for 24 hours without stopping
D. A load that draws the maximum breaker rating for 3 hours or more
Correct Answer: A
Rationale: The best answer is a load expected to continue for 1 hour or more because
that is the exact NEC definition. In the field, you’d use this to know when to bump up
your wire and breaker sizes, but it’s strictly based on that one-hour mark, not a
30-minute or 24-hour guess.
Q2: You are doing a load calculation for a standard single-family dwelling. The living
area is 1,800 square feet. What is the general lighting and receptacle load you will use
for this space before applying any demand factors?
A. 3,600 VA
B. 5,400 VA [CORRECT]
C. 2,700 VA
D. 1,800 VA
Correct Answer: B
Rationale: This is correct because NEC Article 220 specifies a minimum of 3
volt-amperes per square foot for general lighting and receptacles. In the field, you just
multiply the 1,800 square feet by 3 VA to get your baseline load of 5,400 VA, rather than
guessing or using an outdated rule.
Q3: What is the primary purpose of NEC Article 220?
A. To outline the minimum wire sizes allowed for residential branch circuits
B. To provide the standard methods for calculating loads and demand factors for branch
circuits and feeders [CORRECT]
, C. To list the specific overcurrent protection sizes for all motor circuits
D. To establish the rules for grounding and bonding service entrances
Correct Answer: B
Rationale: The best answer is providing the standard methods for calculating loads and
demand factors because Article 220 is essentially the code's calculator handbook. This
matches the rule that before you can size a single wire or breaker, you have to run the
numbers using the tables and rules in 220 to figure out what the load actually demands.
Q4: When calculating the general load for a dwelling, how many volt-amperes must you
automatically include for each small-appliance branch circuit required by the code?
A. 1,000 VA
B. 1,500 VA [CORRECT]
C. 2,000 VA
D. 500 VA
Correct Answer: B
Rationale: This is correct because the NEC flat-out requires you to add 1,500 VA for
each of those kitchen and dining circuits. Remember, before you do any math on the
actual appliances, you just start by multiplying the number of required small appliance
circuits by 1,500 VA to build your baseline.
Q5: Load Schedule Excerpt:
● Circuit 1: General lighting (Non-continuous)
● Circuit 2: Office HVAC compressor (Runs 6 hours/day)
Circuit 3: Warehouse lighting (Runs 3 hours/day)
Based on this brief snippet, which circuit absolutely requires you to apply the 125%
multiplier when sizing its conductors?
A. Circuit 1 only
B. Circuit 3 only
C. Circuit 2 only [CORRECT]
D. Circuits 2 and 3
Correct Answer: C
● Rationale: The best answer is Circuit 2 only because running 6 hours a day firmly
puts the HVAC compressor in the continuous load category. This matches the
rule that anything running over an hour gets the 125% treatment, whereas a
3-hour lighting run doesn't legally qualify as continuous under the NEC.
Q6: You need to find the volt-ampere rating of a 240-volt baseboard heater that draws
12.5 amps. How do you calculate its load?
A. 240V x 1.25 = 300 VA
Branch Feeder Circuits Quiz Actual Exam –
Complete Questions and Answers with Detailed
Rationales – Pass Guaranteed – A+ Graded
Fundamentals of Load Calculations
Q1: According to the National Electrical Code, what is the exact definition of a
continuous load?
A. A load where the maximum current is expected to continue for 1 hour or more
[CORRECT]
B. Any load that runs for more than 30 minutes at a time
C. A load that stays on constantly for 24 hours without stopping
D. A load that draws the maximum breaker rating for 3 hours or more
Correct Answer: A
Rationale: The best answer is a load expected to continue for 1 hour or more because
that is the exact NEC definition. In the field, you’d use this to know when to bump up
your wire and breaker sizes, but it’s strictly based on that one-hour mark, not a
30-minute or 24-hour guess.
Q2: You are doing a load calculation for a standard single-family dwelling. The living
area is 1,800 square feet. What is the general lighting and receptacle load you will use
for this space before applying any demand factors?
A. 3,600 VA
B. 5,400 VA [CORRECT]
C. 2,700 VA
D. 1,800 VA
Correct Answer: B
Rationale: This is correct because NEC Article 220 specifies a minimum of 3
volt-amperes per square foot for general lighting and receptacles. In the field, you just
multiply the 1,800 square feet by 3 VA to get your baseline load of 5,400 VA, rather than
guessing or using an outdated rule.
Q3: What is the primary purpose of NEC Article 220?
A. To outline the minimum wire sizes allowed for residential branch circuits
B. To provide the standard methods for calculating loads and demand factors for branch
circuits and feeders [CORRECT]
, C. To list the specific overcurrent protection sizes for all motor circuits
D. To establish the rules for grounding and bonding service entrances
Correct Answer: B
Rationale: The best answer is providing the standard methods for calculating loads and
demand factors because Article 220 is essentially the code's calculator handbook. This
matches the rule that before you can size a single wire or breaker, you have to run the
numbers using the tables and rules in 220 to figure out what the load actually demands.
Q4: When calculating the general load for a dwelling, how many volt-amperes must you
automatically include for each small-appliance branch circuit required by the code?
A. 1,000 VA
B. 1,500 VA [CORRECT]
C. 2,000 VA
D. 500 VA
Correct Answer: B
Rationale: This is correct because the NEC flat-out requires you to add 1,500 VA for
each of those kitchen and dining circuits. Remember, before you do any math on the
actual appliances, you just start by multiplying the number of required small appliance
circuits by 1,500 VA to build your baseline.
Q5: Load Schedule Excerpt:
● Circuit 1: General lighting (Non-continuous)
● Circuit 2: Office HVAC compressor (Runs 6 hours/day)
Circuit 3: Warehouse lighting (Runs 3 hours/day)
Based on this brief snippet, which circuit absolutely requires you to apply the 125%
multiplier when sizing its conductors?
A. Circuit 1 only
B. Circuit 3 only
C. Circuit 2 only [CORRECT]
D. Circuits 2 and 3
Correct Answer: C
● Rationale: The best answer is Circuit 2 only because running 6 hours a day firmly
puts the HVAC compressor in the continuous load category. This matches the
rule that anything running over an hour gets the 125% treatment, whereas a
3-hour lighting run doesn't legally qualify as continuous under the NEC.
Q6: You need to find the volt-ampere rating of a 240-volt baseboard heater that draws
12.5 amps. How do you calculate its load?
A. 240V x 1.25 = 300 VA
