Electrician Red Seal · Question
A 75 kVA, single-phase transformer is connected to a 480 V primary supply. If the secondary voltage is 120 V, what is the rated full-load current on the secondary side?
The full-load current on the secondary side (I2) can be calculated using the formula Power (VA) = V2 * I2. Therefore, I2 = Power (VA) / V2 = 75,000 VA / 120 V =
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
Question: A 75 kVA, single-phase transformer is connected to a 480 V primary supply. If the secondary voltage is 120 V, what is the rated full-load current on the secondary side?
Answer options:
- 156.25 A
- 312.5 A
- 433.0 A ✅ 625.0 A
Correct answer: 625.0 A
Explanation: The full-load current on the secondary side (I2) can be calculated using the formula Power (VA) = V2 * I2. Therefore, I2 = Power (VA) / V2 = 75,000 VA / 120 V = 625.0 A.
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.