Electrician Red Seal · Question
An electrician is upgrading a branch circuit in a commercial office space. The circuit will supply six 150 W LED light fixtures. If the circuit voltage is 120 V and the circuit is continuous (expected to operate for 3 hours or more), what is the minimum ampere rating of the overcurrent device required for this circuit, considering CE Code Rule 8-104(1)?
The total connected load is 6 fixtures x 150 W = 900 W. For a continuous load, CE Code Rule 8-104(1) requires the overcurrent device to be sized at not less tha
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
Question: An electrician is upgrading a branch circuit in a commercial office space. The circuit will supply six 150 W LED light fixtures. If the circuit voltage is 120 V and the circuit is continuous (expected to operate for 3 hours or more), what is the minimum ampere rating of the overcurrent device required for this circuit, considering CE Code Rule 8-104(1)?
Answer options:
- 15 A ✅ 20 A
- 25 A
- 30 A
Correct answer: 20 A
Explanation: The total connected load is 6 fixtures x 150 W = 900 W. For a continuous load, CE Code Rule 8-104(1) requires the overcurrent device to be sized at not less than 125% of the continuous load. So, (900 W / 120 V) x 1.25 = 7.5 A x 1.25 = 9.375 A. The next standard overcurrent device rating is 20 A, as 15 A would be insufficient.
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
More about Electrician Red Seal
Related Questions
- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
- A commercial kitchen is being renovated, and several new 4 kW, 208 V, single-phase electric ovens are being in
- What is the minimum working space depth required in front of an electrical panel rated 200 A, 120/240 V, locat
- A Red Seal electrician is setting up temporary power for a construction site. The main temporary service is a
- A new industrial facility requires a 600 V, three-phase, 150 A feeder to supply a motor control centre. The co
More for Electrician Red Seal candidates
Practice tests
Question explanations
- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
- A commercial kitchen is being renovated, and several new 4 kW, 208 V, single-phase electric ovens are being in
- What is the minimum working space depth required in front of an electrical panel rated 200 A, 120/240 V, locat
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Electrician Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.