Electrician Red Seal · Question
An electrician is performing maintenance on a 25 kVA, 14,400 V primary to 600 V secondary, single-phase distribution transformer. What is the rated primary current of this transformer?
To calculate the rated primary current (I_primary), use the formula I = S / V, where S is the apparent power rating (kVA) and V is the primary voltage. So, I_pr
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
Question: An electrician is performing maintenance on a 25 kVA, 14,400 V primary to 600 V secondary, single-phase distribution transformer. What is the rated primary current of this transformer?
Answer options: ✅ 1.74 A
- 2.89 A
- 0.69 A
- 41.67 A
Correct answer: 1.74 A
Explanation: To calculate the rated primary current (I_primary), use the formula I = S / V, where S is the apparent power rating (kVA) and V is the primary voltage. So, I_primary = 25,000 VA / 14,400 V = 1.736 A. Therefore, 1.74 A is the closest answer.
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.