Hire a qulified electrician.
The amperage capacity of the main bus bars and the connection of the main breaker to the bus bars.
You can reduce the breaker size because that limits the current that can reach the main panel. There is no safety issue other than the significant danger in an unskilled person changing out a main breaker.
Replace it immediatly, the breaker is no longer within code.
Look on the handle end of the main breaker. There should be a number there. That is the amperage of the main breaker. That is the size of your house service.
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.
The breaker will have a black wire connected to it. Turn off the main breaker and then disconnect that black wire from the breaker. The breaker will snap into the main bar. Remove the breaker and install the new one. Reconnect the black wire to the breaker and then install the cover and turn the main breaker back on.
You replace the breaker.
To replace breakers in an electrical box it is extremely important the replace the breaker with the same wattage. Do not replace a 100 breaker with a 20 breaker is can cause damage.
The voltage before the breaker is from the distribution panel's buss bars. This voltage is controlled by the panel's main breaker. To have no voltage on the terminal of the breaker means that either the breaker is shut off or it has gone into a trip position. If it has tripped push the handle of the breaker to the off position and then to the on position. This should reset the breaker. If the voltage is not present at the output terminal of the breaker after resetting it, then replace the breaker as it has a fault in it.
there is no breaker, u have to replace the fuse
NO!
The wiring is like this:[[30KW Motor ---- Star Delt Starter(100A Breaker inside) ----- 200A Breaker------50A Breaker(Inside the breaker box which located inside the factory) -----100A Main Breaker]]Once I try to start the Motor, the Main Breaker trips immediately.
The amperage capacity of the main bus bars and the connection of the main breaker to the bus bars.
You can reset a circuit breaker but a fuse you must replace.
Repairing circuit breakers is not advisable. When a breaker is taken apart there are many parts that have to specifically align up with each other. Any misalignment and the breaker may not operate correctly if subjected to a fault condition. Do like the landlubbers do and replace the faulty breaker with a new one. This makes everyone safe.
No, If the breaker bus is replace with a larger breaker bus you will then void the manufactures warranty and the UL listing of that box for electrical safety.
You can reduce the breaker size because that limits the current that can reach the main panel. There is no safety issue other than the significant danger in an unskilled person changing out a main breaker.