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A single-pole breaker is a 120-volt, 15–20 amp circuit breaker that controls and protects one hot wire, making it the standard choice for lighting, wall outlets, and small appliances. Typically 1-inch wide, these breakers occupy one slot in a residential service panel and trip to cut power during overloads or short circuits.
A single-pole breaker is a 120-volt, 15–20 amp circuit breaker that controls and protects one hot wire, making it the standard choice for lighting, wall outlets, and small appliances. Typically 1-inch wide, these breakers occupy one slot in a residential service panel and trip to cut power during overloads or short circuits.