Not if it is designed and installed properly. Even if you overload a circuit, the most that should happen is a tripped breaker. Panels are designed such that even fault current from a direct short, which can be tens of thousands of amperes, will be safely interrupted. All bets are off however, if the panel has been tampered with or improperly designed or installed.
mineature cicuit breaker
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.
The grounding is done through the metal nipple that connects out of the back of the meter base and into the back of the breaker panel.
the problem is between these two breakers or you have a faulty or oversized breaker closest to the spa.
A circuit breaker will trip if it is faulty or if the connected circuit has a short circuit or a connected device is trying to draw more current than the breaker rating. If you disconnect the output wire from the breaker and it still trips, it is a faulty breaker. If the breaker is tripping immediately when it is turned on then start disconnecting elements of the circuit to see what might be causing the problem. If everything was working and now isn't, it is likely that the wire from the breaker is nicked where it exits the box and is shorting to the feedthru connector.
In the breaker box
It depends on how big the breaker box is for your house, in my old house i couldnt have all the lights on at once because it would blow a fuse and i would have to go outside and mess with the breaker box. considering its 16 tvs AND game systems i would say unless you are rich and have a HUGE HUGE house with a breaker box made for a hospital then most likely you will blow a fuse when attempting to turn them all on. Its not the smartest choice. When you blow a fuse all or most of your lights will go out and unless you know where your breaker box is and how to fix it then i dont recommend you trying that much at one time.
Breaker box
mineature cicuit breaker
The amperage capacity of the main bus bars and the connection of the main breaker to the bus bars.
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.
Breaker boxes do not have fuses associated with them unless the main disconnect is independent from the breaker box. If that is the case both fuses have to be the same in the main disconnect that protects the breaker box.
Its not very likely.
The BREAKER box is in the factory.
it is connected in a box
The grounding is done through the metal nipple that connects out of the back of the meter base and into the back of the breaker panel.
find amphere required