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A circuit breaker, like a switch, turns power on and off by moving one conductor to touch or not touch another conductor. The gap when not touching has to be large enough that electrons cannot pass through the air to the other conductor, producing a spark. The larger the voltage, the farther it can pass through the air, and the larger the gap must be.
So the rated voltage of a circuit breaker or a fuse is the largest voltage it can safely control.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoCurrent Rating of a circuit breaker is simply depends on the load of electrical circuit after circuit breaker + Some Safety Factor. e.g. if i am having 2 electrical drives of rating 100Amp each and 10Amps extra for its control circuit current ,then total load will be 100X2+10*2 = 220Amps. Then we need to take some safety factor [Minimum 125%].suppose i am taking 150% then load current will be 220*1.5 =330Amps. In taking this much of current in consideration,Select the available standard rating for Breaker.
On home breakers, it should be specified. these are typically 10, 15, or 20 amp breakers (except for the main breaker). There are two actual ratings, the load rating (10, 15, or 20 amp) and the interrupting rating (when a fault occurs, how much current the breaker can open). Both of these should be written on the breaker itself.
If you are interested in larger breaker ratings, then you should find the manufacturer and model if you do not have more information (such as test reports, manufacturer documentation, etc.), and request this information from the manufacturer.
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Where circuit breaker are used?
Circuit breakers do not use anything, they are a controlling device. They can automatically open the circuit if the current exceeds the current rating and you can manually disconnect the power from the circuit.
What formula would you use to calculate the current drawn in a low beam headlamp circuit?
Since power is the product of voltage and current, you will need to find out the power rating of the headlamp when on low beam. To find the current, divide the power of the lamp by the voltage (12 V).
BMW 325e electric window circuit breaker reset?
Resetting Automotive Circuit BreakersWithout doing a "hands on" troubleshooting of your vehicle no one on this site can tell you specifically, what is causing the problem, or where to find it. It has been my experience that all of the circuit breakers for automotive applications are self resetting.Inside, they use bimetallic strips, and reset themselves when the circuit current overload, or short circuitconditions, has been removed/eliminated, and the bimetallic strip has cooled down.IF your breaker is not resetting itself after a reasonable "cool down" period, then that suggests:A short circuit condition somewhere in that circuit, orAn overload condition due to the addition of too much "extra" electrical equipment [like for example, a "monster" audio amplifier, or a light bar set], orReplacement of an electrical device with one which uses much more current than the replaced device, orA defective circuit breaker.
Where would you find or use an earth leak circuit-breaker?
Proper name is GFCI (ground fault circuit interrupter). It could be a breaker or receptacle. It's used for wet location circuits, like bathrooms, kitchens, hot tubs, outdoor
When the power cuts off after switching on an appliance what do I do?
You probably popped the breaker. The appliance is drawing too much current for that circuit (or is combined with too many other appliances on that circuit). Unplug it, turn the breaker back on. Try to find a different circuit to operate it on, or move other appliances to other circuits to reduce the load. If you own your residence you might be able to hire an electrician to completely rewire that circuit with larger capacity wire and breaker and changing the outlets also. This will get expensive though. I cannot use my microwave cooker and my stand mixer at the same time, together they will trip the breaker for the kitchen outlets, but one at a time is OK. It might also be an earth fault in the appliance - As stated turn off other appliances on the same circuit (that should cancel out any over load) and test again . If the breaker drops then the appliance is the issue
Where circuit breaker are used?
Circuit breakers do not use anything, they are a controlling device. They can automatically open the circuit if the current exceeds the current rating and you can manually disconnect the power from the circuit.
For circuit breaker what does it mean by AF AT?
AF refers to the ampere rating of the breaker frame and AT refers to the breaker trip rating in amps. These are not breakers that you would find in your home but industrial molded case breakers. The current trips can be changed out to different values all within the same frame size.
What is the meaning of 200AT-250AF in circuit breaker?
250AF refers to the ampere rating of the breaker frame and 200AT refers to the breaker trip rating in amps. These are not breakers that you would find in your home but industrial molded case breakers. The current trips can be changed out to different values all within the same frame size.
What is the meaning of 200AT 250AF in circuit breaker?
250AF refers to the ampere rating of the breaker frame and 200AT refers to the breaker trip rating in amps. These are not breakers that you would find in your home but industrial molded case breakers. The current trips can be changed out to different values all within the same frame size.
Circuit breaker trip cause smoke will homeowner insurance pay for it?
A circuit breaker does not "cause" smoke. A circuit breaker "breaks" a circuit when there is too much current, creating a hazardous condition for the wires that are connected to the circuit breaker. The circuit breaker PROTECTS you from electrical fire. Find the source of the smoke; what burned? If a circuit breaker tripped during the incident, it is usually caused by melting/burning wire insulation, either inside or outside of an appliance. If the insulation inside the walls of your house has burned/melted, it could be that the circuit breaker was too large for the wire or that the circuit breaker failed to shut off at the appropriate current load. If the circuit breaker failed, your insurance should help you. If an appliance overloaded the circuit, your insurance should help you. If someone connected an oversized circuit breaker, causing the wire to overheat, your insurance company may refuse to help you.
How do you find fuse capacity in house lightning?
To find the circuit's capacity you have to look at the breaker or fuse that protects that circuit. On the handle of the breaker you will see a number. that number is the tripping capacity of that particular breaker. On a glass screw in fuse you will see a coloured disk with a number on it that is the capacity that the fuse can handle before opening the circuit. On cartridge fuses the voltage and amperage rating will be printed on the body of the fuse.
Where can you find circuit breaker for headlamps on 1997 jimmy?
The circuit breaker for the headlights is built into the headlight switch.
Where to find Circuit breaker for power window in 1992 Camry?
Where is the circuit breaker for power window in 1990 camry?
Where can you find a 93 f150 wiper and washer 8.25 amp circuit breaker other than from a dealer?
You can find the wiper and washer circuit breaker at most large retail stores. You can also find the circuit breaker at many local hardware stores.
Can a circuit breaker be reset and used again?
A circuit break will reset until it mechanically breaks down. What you should be looking at is why is the breaker tripping all the time. A breaker is a safety device that stop current from overloading the wire that it is protecting. When the breaker trips check and find out what other devices have stopped working. Total up the wattages. If the total is above 1500 watts then something is going to have to be disconnected on that circuit.
When setting up a breaker box how do you determine circuit breaker capacity?
find amphere required
How many ceiling fans can be run on a 20 amp breaker?
There should be a rating panel on the fan. Let's say it says 2A. You should not load the circuit any more than 80% of breaker rating. In our example 80% of 20 A is 16 A so you could handle 8 fans if they were 2 A each. However, the starting current of motors is higher than running current. Depending on speed setting of fans and if they are all started at the same time, the number may be less than 80% of load. Find the rating of your fans and do the calculations.
