'http://wiki.answers.com/Q/If_breaker_CT_ratio_8001_when_current_of_any_phase_crossed_800_ampere_what_would_happen'
Apart from a lot of loud humming, the motor would not turn, it would take a lot of current and, if the circuit breaker did not trip to cut the supply of current, it would probably overheat or might even catch on fire.
brightness will decrease
there's no current
The overall current will decrease by subtracting the current used by each device.
it resists the flow of cuurent
The fuse or breaker should be no bigger than specified for the wiring and devices on the circuit. Your nominal current draw may be 20 amps, but a short circuit would cause maximum current to flow which in this case would be 100 amps until the fuse blew.
A circuit breaker trips when there is an overload of electrical current flowing through it. This can happen when too many devices are plugged into the circuit or if there is a short circuit. When the current exceeds the breaker's capacity, it automatically shuts off to prevent overheating and potential fires.
Energy Breaker happened in 1996.
Phantom Breaker happened in 2011.
Nano Breaker happened in 2005.
Assuming a circuit breaker is also installed, then you will have a phase-to-ground fault, or a dead short. This will cause the current draw to spike and extreme heat to be created, which will hopefully trip the breaker, which will stop the current flow. If no breaker or fuse is used, then the wires will eventually catch fire from the extreme heat.
Block Breaker Deluxe happened in 2004.
What should happen is that the circuit-breaker should trip to cut off the current before the transformer becomes damaged by overheating.
An overload condition is demanding more current than can be supplied. This could trip a breaker, blow a fuse or possibly destroy a device that is drawing too much current.
The current would rise until it blows the fuse or breaker and that would produce an arc as the transformer's inductance tries to maintain the current.
The AC may be tripping the breaker due to an overload of electrical current or a short circuit in the system. This can happen if the AC unit is drawing more power than the breaker can handle, or if there is a fault in the wiring or components of the AC unit. It is important to have a professional inspect and repair the AC to prevent further issues.
I know what would happen. The three amp fuse would blow. Any device that is plugged into a receptacle with out having sufficient resistance to limit the current flow will dead short the circuit and cause the breaker that feeds the circuit to trip. In this case the fuse being of a lower rating that the feed breaker the fuse will blow without tripping the receptacle's feed breaker.