Electrician Red Seal · Question
An electrician is connecting a single-phase, 240 V heater rated at 4.8 kW. What is the approximate operating current drawn by the heater?
For a single-phase resistive load like a heater, power (P) = Voltage (V) * Current (I) (assuming unity power factor, which is typical for heaters). Therefore, C
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Question: An electrician is connecting a single-phase, 240 V heater rated at 4.8 kW. What is the approximate operating current drawn by the heater?
Answer options:
- 10 A ✅ 20 A
- 15 A
- 25 A
Correct answer: 20 A
Explanation: For a single-phase resistive load like a heater, power (P) = Voltage (V) * Current (I) (assuming unity power factor, which is typical for heaters). Therefore, Current (I) = Power (P) / Voltage (V). I = 4800 W / 240 V = 20 A. So, the operating current drawn by the heater is 20 A.
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