Question 1
A branch circuit supplies both general receptacles and lighting in a small office. The breaker trips occasionally when portable heaters are used. What is the most appropriate corrective action?
Question 2
A new lighting circuit has been installed, but all luminaires remain dark when the breaker is switched on. The breaker does not trip. What is the most likely cause?
Question 3
Under typical Canadian residential practice, which copper conductor size is commonly used for a 15 A, 120 V general lighting branch circuit?
Question 4
An electrician is installing a 120V LED lighting system with a total load of 1440 Watts. If the circuit is to be loaded to a maximum of 80% capacity, what is the minimum required circuit ampacity?
Question 5
According to the CEC, what is the maximum permitted size of a 'flexible cord' or 'whip' used to connect a luminaire in a suspended ceiling before it must be supported independently?
Question 6
When installing a 347V luminaire in a commercial building, where is the equipment bonding conductor typically connected inside the fixture?
Question 7
What does the abbreviation 'AWG' stand for when referring to conductor size?
Question 8
What does AWG stand for when referring to conductor size?
Question 9
When interpreting a panel schedule, what does a double-pole breaker typically indicate?
Question 10
For a typical 15 A general lighting circuit in a Canadian dwelling, which copper conductor size is commonly used?
Question 11
A 15 A, 120 V branch circuit supplies two receptacles and a lighting load. The connected loads total 10 A. What is the best action regarding circuit loading?
Question 12
You are troubleshooting a lighting circuit where several luminaires are dim and one is completely off. All are on the same switch. What is the most likely issue?
Question 13
You are asked to troubleshoot a lighting circuit where the breaker is on, but none of the fixtures work. Your meter shows 120 V from hot to ground, but 0 V from hot to neutral. What is the most likely problem?
Question 14
A lighting branch circuit contains four identical 60 W lamps connected in parallel on a 120 V circuit. What is the total current drawn by the circuit?
Question 15
A 120 V, 15 A branch circuit supplies a 6 A lighting load and a 5 A receptacle load. Is this circuit within the 80% guideline for continuous loading?
Question 16
A 16 A continuous load is to be supplied from a 120 V branch circuit. What is the minimum standard breaker rating that should be selected for this load?
Question 17
An electrician is calculating the general lighting load for a 1,500 ft² dwelling unit based on a unit load of 3 VA per ft². What is the total general lighting load in volt-amperes?
Question 18
In a dwelling unit, what is one main purpose of small-appliance branch circuits in a kitchen?