Fuse
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fuse. It is a safety device that automatically switches off the electrical circuit when it detects an overload, preventing overheating and potential fires. Circuit breakers can be easily reset after they trip, unlike fuses that need to be replaced.
Air circuit breakers typically have multiple coils for different functions, such as opening and closing the circuit breaker, tripping mechanisms, and for auxiliary purposes. The exact number of coils can vary depending on the manufacturer and specific model of the air circuit breaker.
A circuit breaker operates by detecting an electrical overload or short circuit in a circuit. When this occurs, the circuit breaker automatically disconnects the circuit to prevent damage to the electrical system and minimize the risk of fire. Once the issue is resolved, the circuit breaker can be reset to restore power to the circuit.
The load exceeds the limit of the breaker or fuse. For example a 20 amp breaker on a 120 volt circuit will handle 2400 watts. Exceed that wattage and the breaker will trip or the fuse will blow.
Tandem breakers, often called split breakers or double breakers, provide two separate circuits in the space of a regular sized breaker opening. Every circuit breaker panel has a limited number of circuit openings available. The problem is that when the openings are all used up and you still need to add another circuit, what do you do? You could change the electrical panel or double up circuits on a breaker, but this could place too much load on a particular circuit. So what then? The answer that many have found is a tandem breaker. This type breaker is the same size as any other breaker, but it has its difference. This breaker sports two smaller breakers built into one regular sized breaker. Each has its own breaker switch and the breaker snaps in just like a regular breaker. With this simple innovation, you can add a circuit and protect the circuit on its own dedicated line.
In North American homes, new homes are prewired to use a 40 amp circuit. A 40 amp two pole breaker in the distribution panel protects a #8 three wire cable. This cable connects the 240 volt supply to the range and oven.