What part of a circuit breaker causes the breaker to trip on an overload?

Also question is, is it dangerous if circuit breaker keeps tripping?

If you circuit breaker keeps tripping, there could be a serious issue, often caused by general wear and tear on the circuit breaker itself, requiring that a new one be installed. Short Circuit: A short circuit is common, but potentially dangerous.

what happens to circuit breaker when current exceeds normal value? Basically, an overload occurs when the current through a circuit breaker exceeds it rated value for longer than what is normal for the application, causing it to trip. For instance, if a 20-amp breaker experiences a current of 25 amps, it will likely trip in less than one minute.

Hereof, what causes a circuit breaker to trip?

An overloaded circuit is the most common reason for a circuit breaker tripping. It occurs when a circuit is attempting to draw a greater electrical load than it is intended to carry. Hence, the breaker or fuse is intended to trip or blow before the circuit wires can heat to a dangerous level.

What are three warning signs of an overloaded electrical circuit?

Overloaded circuit warning signs:

• Flickering, blinking, or dimming lights.
• Frequently tripped circuit breakers or blown fuses.
• Warm or discolored wall plates.
• Cracking, sizzling, or buzzing from receptacles.
• Burning odor coming from receptacles or wall switches.
• Mild shock or tingle from appliances, receptacles, or switches.