Breakers are designed to open when there is too much current. For instance, if you have a 100A breaker and you put a 120A load on it, it trips.
But what if you drop a wrench or piece of pipe across the wires? Much more than 100A will flow, usually thousands of amps. This is fault current. If the current is too high, the breaker can weld itself closed and fail to trip. This would be very bad.
So, breakers have an interrupt rating. It indicates how much fault current the breaker can safely handle and still operate properly. Your 6000A or 10000A is the interrupt rating.
You would need a 10000A breaker instead of a 6000A breaker if the fault current could be in excess of 6000A, but less than 10000A.
How much fault current can flow in a given situation? It depends on how heavy-duty the utility distribution transformer is, and how big the supply wires are. The utility company can usually supply the information which an electrical engineer can use to calculate the interrupt rating needed. The whole panel, not just the breaker, must carry the same or higher interrupt rating.
A scheme where a signal is sent to to a remote location to cause a trip. An example could be a breaker failure scheme. When the breaker is told to trip, and fails to do so, fiber communications could be used to transmit a trip signal from the local substation to the substation the next bus out to cause that breaker to trip.
A shunt trip breaker is installed like any other molded case breaker. The only difference is that it has an internal tripping coil that is usually connected to a C.T. The breaker is usually mounted in a MCC cabinet The top of the breaker is bolted to the MCC bus bars and the bottom of the breaker is connected to the load. The load conductors pass through the C.T.'s which induces a current into the circuit to trip the tripping coil in the breaker.
3000 / 240 = Amps. You de-rate a breaker by 20 % for continuous load like an oven. You could get by with a 20 Amp breaker and 12 AWG wire. However, I would recommend 30 Amps and 10 AWG for an oven for the long run.
A 14 gauge extension cord can safely carry 15 amps, but not very far. Number 14 gauge extension cords are only rated for about 13 amps according to the labels on the cord. This is because the insulation is not intended to withstand the heat of currents above this level. Running this cord over 50 feet or loading it to 18 amps would be unacceptable.The likelihood of the cord maintaining the 18 amps for any amount of time for the high current to do any damage to the insulation of the cord is not very great. Extension cords are only an extension of the 15 amp wall circuit that they are plugged into. On overloading the extension cord by that amount the overload will trip the 15 amp supply breaker. An example of this is jamming a circular handsaw when it is plugged into the end of a 50 foot extension cord. The next action that is taken is to reset the tripped breaker.
Something that doesn't let electricity throughAnswerAn isolator (UK terminology) or disconnector (US terminology) is a switch used to isolate a section of a circuit from any energised conductors, by presenting a visible break in the circuit. Isolators are not designed to break load currents (unless fitted with optional arc-breaking feature) or to break fault currents. In high-voltage systems, isolators are used in conjunction with circuit breakers -with the isolators opened after a circuit breaker has opened the circuit, and closed before the circuit breaker closes the circuit. For example, before one can perform maintenance work on, say, a high-voltage circuit breaker, the following sequence must be followed:the circuit breaker is opened, breaking the circuit.isolators located on either side of the circuit breaker are opened, presenting a visible break between the isolator and energised lines.temporary earth (ground) connections are applied to each side of the circuit breaker.barriers and warning signs are erected around the circuit breaker to define the permitted work area.a permit to work card, listing the work to be performed, and any potential hazards, is issued to the personnel who are to maintain the circuit breaker.
An example of a circuit protection device is a fuse. Another example is a circuit breaker.
Example sentence - We hired an electrician to at the circuit breaker and install an updated panel.
For a fraction to be written in its lowest possible form you have to divide top and bottom. Example 12/20 = 6/10 = 3/5
Branch circuits are protected by the circuit breaker found in the electrical panel. Each circuit should have its one breaker. The breaker should be rated to protect the insulation of the wire, so you can determine the breaker size based on the circuit conductor size Example #14-2 should be protected by a 15 amp breaker
Yes, the word possibly is indeed an adverb.An example sentence for you is: "it will possibly be the most important scientific discovery for decades to come".
The simplest example is diethyl ether.
The simplest example is water.
The simplest example is water.
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.
You simplify the answer as much as possible. For example if you got an answer that was 5/10, and it said to put it in simplest form, it would be reduced down to 1/2, because it can't be reduced anymore without it being a whole number.
The simplest form of 2/4 is 1/2.
The simplest form of 3/6 is 1/2.