The answer to 'why is my junction box tripping breaker' is that there is likely an electrical issue causing a short circuit or overload in the junction box. This can be caused by a variety of factors, such as faulty wiring, damaged components, or too many devices being connected to the circuit.
When a junction box trips the breaker, it's a sign that the electrical system is overloaded or there is a problem with the wiring. This is a safety feature to prevent fires or electrical damage. However, it's important to address the underlying issue to prevent further tripping and potential hazards.