Question 1
A small office room is designed to have a total lighting load of 1.5 kW at 120 V. If the lights are supplied from a 15 A, 120 V branch circuit, which statement is MOST accurate?
Question 2
You are laying out receptacle circuits for an office space. The plan calls for a maximum of 12 receptacles on each 20 A, 120 V branch circuit. What is the main reason for limiting the number of receptacles per circuit?
Question 3
A 15 A, 120 V general-use branch circuit in a dwelling is loaded with receptacles totalling 9 A continuous load and 4 A non-continuous load. Is this loading acceptable?
Question 4
A long 120 V branch circuit supplies receptacles at the far end of a building. The loads are within the breaker rating, but equipment at the far end runs poorly. Which factor is most likely contributing to the issue?
Question 5
A 15 A, 120 V residential branch circuit supplies general-purpose receptacles. The measured continuous load is 10 A. Is this acceptable for a continuous load under typical Canadian code rules?
Question 6
On a panel schedule, what information is typically listed for each circuit?
Question 7
You are troubleshooting a lighting circuit where all fixtures on one switch are out. The breaker is not tripped, and voltage is present at the breaker. What is the next logical step?
Question 8
During a renovation, you discover an existing junction box fully concealed above a new drywall ceiling with no access panel. How should this condition be addressed?
Question 9
A new panelboard has several circuits labeled incorrectly. What is the best practice for correcting this issue?
Question 10
On a residential blueprint, a circuit number labeled 'Ckt 7' beside several receptacle symbols indicates what?
Question 11
When reading a panel schedule, what information is typically found next to each circuit number?
Question 12
A continuous load of 28 A is supplied by a 240 V branch circuit in a commercial shop. Ignoring derating for conditions of use, which minimum standard circuit breaker rating is typically required?
Question 13
On an electrical plan, a lighting circuit is labeled 'Ckt 12' in several rooms. What does this typically indicate?
Question 14
A 20 A, 120 V branch circuit supplies several receptacles. The measured load is 14 A. What best describes the loading on this circuit?
Question 15
A contractor asks you to install additional receptacles on an existing 20 A general-purpose circuit already serving several outlets in a small office. The voltage drop is near recommended limits at the farthest point. What is the BEST solution?
Question 16
On a panel schedule, breaker 7 is labeled 'Kitchen small appliance recepts' and breaker 9 is labeled 'Dishwasher'. If an apprentice turns off breaker 7, what should they expect to lose power to?
Question 17
A 120 V, 15 A branch circuit in a dwelling is supplying a continuous lighting load. According to common design practice using the 80 percent rule, what is the maximum continuous load current that should be placed on this circuit?
Question 18
A branch circuit supplies three 120 V receptacles on a jobsite. A portable drill runs slowly on all three receptacles, but a tester shows correct wiring. What is the MOST appropriate next test?
Question 19
A 15 A, 120 V branch circuit supplies three receptacles. A 12 A vacuum, a 3 A task light, and a 2 A phone charger are used simultaneously. Will the circuit be overloaded?