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What is exactly the function of Neutral link in an electrical circuit?
Wiki User
∙ 12y ago
To protect a circuit, we use a fuse or circuit breaker. The fuse or circuit breaker must always be placed in the lineconductor, never in the neutral conductor. So, if we want to completely isolate a circuit from the supply, we must remove the fuse from the line conductor, and open the link in the neutral conductor. A 'link' is a non-fusible metal break point in the neutral.
Wiki User
∙ 12y ago
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What is a purely capacitive circuit means?
A 'purely capacitive' circuit is a theoretical, or 'ideal', circuit, in which the resistance and inductance of the circuit is ignored, and in which the load current theoretically leads the supply voltage by exactly 90 electrical degrees. It is often used as a means of introducing students to the behaviour of 'real' a.c. circuit which contain contain resistance and inductance, as well as capacitance.
Can you run 2 neutral wires together?
It's not clear what exactly you mean. You can run two neutrals next to each other as long as you otherwise abide by electrical codes regarding the limits of conductors in an enclosure and gauge size. You can also use a single neutral return for two circuits if those two circuits are opposite phase, since the net result will be that the neutral never carries more than a single circuit load and may sometimes carry less or even nothing if both circuits are in use.
We have a problem with induced voltage. We measure 220 VAC in the L and 45 to 60 VAC in the N. There is no chance of changing the cable. How to avoid this?
Normally the neutral wire of every circuit is connected to the neutral bus bar in the main breaker panel. Because the neutral bus bar is always connected to ground you should never be able to measure any voltage between the neutral wire and ground.So, if you are measuring 45 to 60 VAC between the neutral and the ground it could be that the neutral wire has become disconnected at the breaker panel or somewhere in between the panel and the point where you are measuring that voltage.Assuming the load equipment - an appliance, a motor or whatever - is still connected to the hot and neutral wires, then, if there is no connection to the neutral going back to the power station, in effect you are measuring the line voltage from the hot feed as reduced by the resistance and/or reactive impedance (total reactance) of the load. That could be making 45 to 60 VAC, as read by your meter, appear on the neutral wire coming back from the load.A simple way to prove if that is the case is to unplug or disconnect all loads - appliances, light fixtures, motors, etc. - from the circuit in question. If you cannot then measure any voltage between the neutral wire and ground the next thing to check is the resistance between the neutral and ground.First of all switch off the circuit by switching off the breaker at the main panel - or remove the circuit's fuse if it has a fuse and no breaker - and then use the resistance range on a multimeter to measure the resistance between the neutral wire and ground. If it is a very low resistance then an open neutral is not the cause of your problem. If it measures as a very high resistance or an open circuit then your problem is an open neutral.The reason for the open neutral must be found and that fault must then be corrected urgently.In the Discussion page to this question please let us know what you found when you did the tests suggested above, and whether or not this advice helped you to locate and fix this problem.To be able to help you better it is important to know exactly here this circuit is located geographically in the world and to have confirmation whether - as inferred from your question - it is a 50Hz system with one 230V live and one neutral or whether it is actually a 60 Hz system having two 120V hots (+120V and -120V) balanced around neutral.Then, if necessary we shall have to consider what other reasons could cause the fault you have described but to be able to do so it would help to know exactly what you found when you did the tests described above.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
Where is the likely point to start fire due to loose neutral wire?
The most likely place for heat build up in an electrical system, and hence fire, is the point with the most resistance. In this case right exactly where the loose neutral is.However, for an electrician, the task of fixing a loose neutral is generally very small. It shouldn't take more than 10 minutes to locate and fix, and so, no more fire!If in doubt, please contact a registered electrician.
Why neutral is earthed?
Neutral earth is very necessary for observe the unbalaced laod of the 3 phase system. it is also useful for single phase supply and in lighting purpose. neutral earth is also earthed the short ciruit fauly current , which is flowing through neutral. this type it is very essencial for protection and safety purpose.AnswerThere are a number of reasons why the neutral of a supply is earthed (grounded). The first reason is to protect the low-voltage secondary side of the distribution tranformer in the event of a short circuit from the high-voltage secondary side (it will cause the protection on the high-voltage side to disconnect the transformer). The second reason is to establish a datum point for potentials measured on the secondary side of the tranformers -in particular, if the star-point of a three-phase transformer is not earthed, then an unbalanced load will result in unbalanced supply phase voltages, and a potential-difference between neutral and earth -both undesirable and dangerous.
What happen if fuse is connected to neutral wire?
The fuse will be blown off in case of any fault. But the circuit will not be isolated because of the presence of fuse in nutral line. current will still flow and the line will be so dangerous.
Is it possible to synchronise two generators with no common electrical load to be exactly out of phase?
No, is it not permissible to synchronise two generators with no common electrical load to be exactly out of phase. Doing so would represent a double short circuit to both generators, and possible destruction of both generators. Whether it is possible or not depends on the design of the synchronizing circuit and/or the stupidity of the operator.
What is a purely capacitive circuit means?
A 'purely capacitive' circuit is a theoretical, or 'ideal', circuit, in which the resistance and inductance of the circuit is ignored, and in which the load current theoretically leads the supply voltage by exactly 90 electrical degrees. It is often used as a means of introducing students to the behaviour of 'real' a.c. circuit which contain contain resistance and inductance, as well as capacitance.
What is purely capacitive circuit means?
A 'purely capacitive' circuit is a theoretical, or 'ideal', circuit, in which the resistance and inductance of the circuit is ignored, and in which the load current theoretically leads the supply voltage by exactly 90 electrical degrees. It is often used as a means of introducing students to the behaviour of 'real' a.c. circuit which contain contain resistance and inductance, as well as capacitance.
Can you run 2 neutral wires together?
It's not clear what exactly you mean. You can run two neutrals next to each other as long as you otherwise abide by electrical codes regarding the limits of conductors in an enclosure and gauge size. You can also use a single neutral return for two circuits if those two circuits are opposite phase, since the net result will be that the neutral never carries more than a single circuit load and may sometimes carry less or even nothing if both circuits are in use.
What is the name for the flow of electrons in an electric circuit?
A flow of electrons in an electrical circuit is called a current, which is the name given to the amount of electrical charge flowing in a certain period of time.Any total quantity of electrical charge is measured in coulombs.Any flow of electrical current is measured in amps.1 amp is equal to a flow of 1 coulomb of electrical charge in one second of time.
Why would a hot wire go directly from the breaker to the neutral bar?
If this is is exactly what you are seeing then the breaker will not be resettable. The breaker will instantaneously trip. If the identified conductor comes into the distribution panel from an external circuit then this is another scenario.
How exactly does AC work?
AC current works by making electricity rotate from a positive to negative causing the whole electrical circuit to become charged. This helps it charge faster and makes it stronger for charging.
If the pH value of a chemical is exactly 7 what is the pH?
it's neutral. less than 7 is acidic more than 7 is basic. so exactly 7 would be neutral.
What electrical charge does an atom's nucleus have?
The atom's nucleus is positively charged, with the number of positive charges being equal to the atom's atomic number.The nucleus contains positive protons and neutral neutrons making it positive.There are no negatives because electrons are not in the nucleus, but around the nucleus.
How does the GFCI prevent serious injury from electric current?
Inside the GFCI is an electrical device that constantly compares the current on the two wires of an electrical circuit. If, at any time, the electrical device detects an imbalance, the GFCI shuts off the circuit. Most electrical shocks occur when a person touches the LIVE wire of a circuit while grounded in some other way (such as standing barefooted on concrete). The GFCI detects that imbalance and shuts off the circuit so quickly that we often don't even feel the shock. As a word of caution, don't depend on the GFCI as a substitute for common sense. If you aren't touching some kind of grounded surface, the GFCI will not function. In that situation you are nothing more than another resistance load. Also, if you feel that the GFCI will protect you and ignore normal caution around electricity, you may encounter a circuit that is either NOT protected with a GFCI, or you may encounter a GFCI that has failed. Either way, always use caution when doing anything with electricity.
You disconnected a 240 volt wall heater now connecting the wire to a receptacle Is white wire hot in that case?
The white wire in a 240 circuit may be hot depending on exactly how it was wired. There are 2 120V circuits in a 240 v circuit and if all the electrician had was a cable with black and white then he very well may have used white as the other hot wire leaving 2 hot wires and no neutral. If a separate neutral was not run for the 240 circuit then a new cable may have to be pulled from the breaker panel that has a neutral. If you have the skills with a meter, you can check. If you are going to do this work yourself make sure that you shut off the main disconnect to the electrical panel and just use a flashlight to see the work you have to do. That said, it is common practice to use a two wire to feed wall heaters. You will find that the two wires are fed from a 2 pole breaker. Keep in mind that there should not be any other heaters on the circuit, if there is the other heaters will not work. In the electrical panel the white wire has to be taken off the 2 pole breaker and terminated onto the neutral buss. The other wire on the 2 pole breaker should be taken off and put into a single pole 15 amp breaker. Now on the receptacle end white wire to the silver coloured screw and black coloured wire to the brass screw.
