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What happens to equipment when you lose the neutral on a three phase multi circuit?
Wiki User
∙ 12y ago
If the loads are balanced across all thee phases, all equipment would continue to operate. However this is not usually the case with a multi wire branch circuit. Some branches pulling a higher current would continue to pull a higher current and raise the current on the other branches trying to balance the load. Good example of this would be a refrigerator plugged in to one branch and a computer plugged in to the other. The fridge pulls about 9 amps and the computer about one amp, so now if we pull 9 amps through that computer, we have a problem. Loss of the neutral also raises the voltage on these branches.
Wiki User
∙ 12y ago
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How many ground wire for a multi wire circuit?
One
Why is a Multi-circuit evaporator used?
why is a multicircuit evaporator used
How many neutrals for a multi wire circuit?
On a three phase 4 wire panel board you can have 3 hot wires per neutral. The three hot wires have to be from each phase. You can not double up on a phase and a neutral. eg. L1 and L2 and L3 to one neutral. Other combinations, L1,L2, N - L2,L3,N - L3,L1,N. You can not use L1,L1,N - L2,L2,N - L3,L3,N.
Statis electricity is a kind of electricity What is this electricity type?
To whom it may concern, Did you mean to ask what is static electricity?? If so the term static, which means stays the same, means the electricity in a circuit is static; it does not change direction and electrons only have 1 path to travel. An example of a static circuit would be a DC ( Direct Current) circuit, whereas an AC circuit; alternating current, alternates between 120v to 0v, then 0 to negative 120, back to 0v, then to positive 120v, however, this happens at so fast you would never catch a reading on a multi meter.
What best practice to avoid electrical shock?
Never place items, especially metal utensils, inside an electric appliance while it is plugged into a wall outlet.Children tend to stick paper clips or other small items they find in electrical outlets.Never forget -- water and electricity don't mix.Inspect wiring of equipment before each use. Replace damaged or frayed electrical cords immediately.Know the location and how to operate shut-off switches and/or circuit breaker panels. Use these devices to shut off equipment in the event of a fire or electrocution.Use safe work practices every time electrical equipment is used.Use only multi-plug adapters equipped with circuit breakers or fuses.
What roles do insulated wires play in preventing a short circuit?
A "short circuit" by definition is a fault from the hot wire to the neutral in a single phase piece of equipment, or a fault between any 2 hot wires in a multi-phase piece of equipment. Proper insulation prevents this from happening.
What happens if neutral wire is disconnected?
It depends - if a single circuits' neutral is disconnected then anything downstream will not work - there is no return path for power. If it is the neutral for a milti-wire circuit (such as the neutral - and ground - connection at the main panel) then you run the risk of creating a voltage imbalance if there are any 220v devices running. That's because a 120v load is using the other hot leg as a return path - through the 220v device. Clear as mud, huh? Suffice to say it is a bad thing. I have seen many instances in which office equipment has burned up due to bad connections in a multi-wire power pole.
What cause current on the neutral line in a three phase?
Current on neutral in a multi phase system is caused by imbalance between the phases. Question: Are you talking about neutral or ground? The two are very different. Although neutral is grounded, it is expected to be a current carrying conductor, so current on neutral is normal, so to speak. Ground, on the other hand is a protective circuit that is not supposed to have any current on it at all.
How many ground wire for a multi wire circuit?
One
Why is a Multi-circuit evaporator used?
why is a multicircuit evaporator used
How do you check a circuit relay to know if it is working?
Use a multi-meter.
How do you change my multi function display for Fahrenheit to Celsius for temp?
The answer depends on what equipment has your multi-function display. I suggest you refer to the user manual.
What is the conclusion for report of classic astable multi-vibrator circuit or LED flasher circuit of 9V with 2 transistors?
It is a circuit that function in only two states, on and off...but it will never be stable
How many neutrals for a multi wire circuit?
On a three phase 4 wire panel board you can have 3 hot wires per neutral. The three hot wires have to be from each phase. You can not double up on a phase and a neutral. eg. L1 and L2 and L3 to one neutral. Other combinations, L1,L2, N - L2,L3,N - L3,L1,N. You can not use L1,L1,N - L2,L2,N - L3,L3,N.
What happens when you disconnect a neutral at source in a three phase system?
== == == == It is true. Damage will most likely result somewhere, maybe not everything. When a neutral on a multi-wire circuit is opened (open-circuited) (removed) (cut) while things are under load, the voltage will change at the loads. Some loads will get more than normal, some will get less. The damage usually occurs on the side that gets MORE voltage. For example: your TV may be on a circuit that goes from 120volts to 50 volts, while your light bulb goes from 120volts to 180volts and blows. It all depends on how "balanced" the circuit is. In theory, if the loads are perfectly balanced then the neutral is not needed. In reality loads vary constantly, therefore, the voltage will vary if the neutral is open-circuited. That means running with an open neutral is something that anyone with any smarts at all will not do. It is absolutely possible to damage equipment by opening the neutral in some circumstances. 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.If you do this work yourself, always turn off the powerat the breaker box/fuse panel BEFORE you attempt to do any work ANDalways use an electrician's test meter having metal-tipped probes(not a simple proximity voltage indicator)to insure 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.
What is the superposition?
This theorem is used to determine the value of current in specific branch of a multi voltage source circuit .
Where can York Multi Gym products be bought?
York Multi Gym products can be purchased directly from the York Fitness website. In addition to the Warrior Multi Gym, they sell other fitness equipment such as treadmills and ab benches.
