A 2-pole, 20-amp circuit breaker connected to 10 AWG 2-conductor cable yields a circuit rating of ___ amps.

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Study for the Independent Electrical Contractors (IEC) Year 4 Test. Use flashcards and multiple-choice questions, each with hints and explanations. Prepare effectively for your exam!

Multiple Choice

A 2-pole, 20-amp circuit breaker connected to 10 AWG 2-conductor cable yields a circuit rating of ___ amps.

Explanation:
The circuit rating is determined by the overcurrent protection device, not by the conductor alone. A two‑pole breaker rated at 20 amps provides protection at 20 amps on each leg, so the circuit’s rated current is 20 A. The 10 AWG two‑conductor cable can handle more than 20 amps, so it isn’t the limiting factor here. In short, the breaker size governs the circuit rating, making it 20 amps.

The circuit rating is determined by the overcurrent protection device, not by the conductor alone. A two‑pole breaker rated at 20 amps provides protection at 20 amps on each leg, so the circuit’s rated current is 20 A. The 10 AWG two‑conductor cable can handle more than 20 amps, so it isn’t the limiting factor here. In short, the breaker size governs the circuit rating, making it 20 amps.

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