0
If you touch the earth wire do you get a shock if the supply entering a home is called multiple earthed neutral where the neutral is connected to the earth wire. Where does the neutral current go?
Wiki User
∙ 11y ago
No, you should not get a shock if you touch the earth wire!
If you do get a shock then something has been hooked-up wrongly or has become disconnected, in which case, if you do not really know enough about electricity to fix it yourself, you would need to call in a professional electrician urgently to correct the fault before someone gets electrocuted!
The type of "multiple earthed neutral" mentioned in this question, also known as PME (for Permanent Multiple Earth) is commonly used in many countries nowadays to provide electrical safety earthing. The reason for using it is that it has been proved to be much more reliable than the "old-fashioned" method which, at each property, uses a separate earthing rod or the water pipes. (Using only an incoming water pipe coming from the ground at a property can be veryunreliable from an electrical safety point of view!)
The Neutral is simply a "return" wire: under normal circumstances it carries current back to the power station after it has been fed to appliances by the "hot" or "live" wire.
More information about these topics is contained in the answer to the Related Question shown below.
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 KIND OF
WORK SAFELY AND COMPETENTLY
ALWAYS REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Why zero sequence current cannot flow through a star connected machine unless the neutral is grounded?
If the neutral point is not earthed than the zero sequence current will not have any return path.It will be an open circuit for the zero sequence circuit.
Should double insulated appliances ever be earthed?
There is no need to. The manufacturer designed the appliance for the specification of not needing a ground to be connected to it.
Can delta connection be used on 3 phase 4 wire system?
A delta connected appliance can be connected to a 3-phase system by leaving the neutral unconnected. The appliance must be properly earthed.
Why star point of star connected motor is not grounded?
Another AnswerA motor represents a balanced three-phase load and, therefore, there is no neutral current, so there is no requirement for a neutral connection. Regulations prevent an earth being used as return, so the star point shouldn't be earthed either.
Why secondary winding and metal core earthed at one point?
generally tertiary wndng is delta .if one point of this delta is earthed(through a CT) then it is not a earth fault. thansformer will operate normally. now if a second point(or any point on the delta winding) is earthed (earth fault) then the fault current will be sensed by the said ct.and Transf will tripped. Avradeep Das. email id: avra.wbsetcl@gmail.com
Why must a fuse always be connected in a non-earthed conductor?
It is the ungrounded conductor that carries the load current. It is that conductor that needs to be protected should a fault current occur. That is what the fuse in that circuit does.
Why zero sequence current cannot flow through a star connected machine unless the neutral is grounded?
If the neutral point is not earthed than the zero sequence current will not have any return path.It will be an open circuit for the zero sequence circuit.
Why is electrical earthing critical?
Because when there is an overflow of current, for example in a lightning storm, a well-electrically-earthed equipment will discharge the overflow to earth. If it's not earthed, the current could flow to the people touching the equipment, or to critical components inside it.
Should double insulated appliances ever be earthed?
There is no need to. The manufacturer designed the appliance for the specification of not needing a ground to be connected to it.
Can delta connection be used on 3 phase 4 wire system?
A delta connected appliance can be connected to a 3-phase system by leaving the neutral unconnected. The appliance must be properly earthed.
Electric fittings are earthed so that?
current may pass to the earth in case of short circuit without any harm.
Difference between earthed and unearthed cable?
For earthed and un earthed XLPE cables, the IS 7098 part2 1985 does not give any difference in specification. The insulation level for cable for unearthed system has to be more. In simple statement the manufacturers states that 11 KV earthed cable is suitable for use in 6.6 KV unearthed system.The process of manufacture of cable is same. The size of cable will depend on current rating and voltage level.
Why put earthed strip between a circuit and the circuit board?
An earthed strip is a low resistance strip. as we know that a current always flows along a path which is having the least resistance.Whenever a fault current flows through the circuit and a possiblity is there that it may damage the ckt & ckt board the earth strip allows the fault current to flow through it and ground it. thereby preventing the damage.
When was Earthed to the Ground created?
Earthed to the Ground was created in 1984-05.
Why star point of star connected motor is not grounded?
Another AnswerA motor represents a balanced three-phase load and, therefore, there is no neutral current, so there is no requirement for a neutral connection. Regulations prevent an earth being used as return, so the star point shouldn't be earthed either.
What is an Earthed voltage transformer?
An earthing transformer provides a neutral in a delta connected system.
What is the star point of a CT?
The term, 'star point', refers to the common point of connection for the three windings of a star-connected (wye-connected) transformer connection. The star point is usually earthed (grounded) and provides the neutral point of the connection.
