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Electrical Troubleshooting
Electrical troubleshooting involves checking and resolving an electrical problem (such as when an electrical device stops working correctly). Common troubleshooting practices include checking if the power is on, the bulb has burnt out, or the breaker tripped.
885 Questions
It means that the low pressure switch is open. Check the heat pump schematic to see if it is supposed to be an open or closed switch. Schematic electrical drawings are drawn in the de energized position. This means that when there is no voltage applied to the device, this will be the position of relays and contacts.
It is a circuit that controls some aspect of a system. In a car there may be multiple control circuits such as anti-lock brakes. It takes various inputs, processes the inputs and produces some control outputs, like pulsing the various brakes and assessing the results.
Brushes and bearings are component parts of a generator. The brushes are used to deliver the field voltage to the revolving rotor. The bearings are needed to allow the rotor to revolve. The bearings also maintain alignment to prevent the rotor from dragging on the stator.
Why is the resistance of volt meter very high?
So it doesn't effect the circuit being tested. If a low impediance or resistance meter were inserted in the circuit, voltages may drop and effect the accuracy of the test. Any voltmeter will use some power from the circuit to make a reading. A "high impediance voltmeter" will use very little power from the circuit so the voltage reading will be as accurate as it can be.
What you want to do in the coming months in maintenance?
Generally there is a maintenance schedule with what is to be done, when to be done, who to do in any good standard industry. Maintenance crew generally follow the schedule.
How can all breakers be live and outlets not work?
The very first outlet in the circuit has a break, probably where the wires enter the receptacle.
What does a 35 amp time delay fuse look like when it blows?
If you can observe the fusible link it should be open and there should be some charring on the glass. Use an Ohm meter to confirm fuse is blown. If it is zero ohms across the fuse it is not blown.
What is a small wire attached to a two pronged adapter for grounded appliances called?
A ground wire.
Can a gfci receptacle be tripped by a fluorescent light?
Yes, you can have current leakage with any device. Check the device with an ohm-meter with the POWER turned off. Unplug the device and check between the hot leads and the ground wire. It should be infinite readings. Check also from hot leads to device chassis or metal case.
What does the m before Amps stand for?
milliamps, or 1/1000th of an amp, or 0.001 amp
CommentThe correct term is milliamperes, not 'milliamps'.
What is an electric power sensor?
Electrical power sensors are used to measure characteristics of electric power such as voltage, current, power, and potential degradation of insulation due to age. For AC circuits, an electric power sensor can also be used to measure power quality. Some electrical power sensors are incorporated into transformers or other components of the power distribution grid. Others are added to existing systems. Typically, these electrical power sensors measure one or more physical characteristics and convert them to electrical signals. Basic electric power sensor categories include electrical capacitance sensors, electrical frequency sensors, electrical resistance sensors, and electrical conductance sensors.
How many take amp 40 watt fluorescent lamp?
Watts= voltage times amps. So if you divide Watts by voltage, you will get amps = .33333 or about a 1/3 amp load. This is assuming a 120 volt circuit.
Why is ceiling fan overheating?
Overheating is a symptom of too much current. There may be a short in the winding of the fan motor across windings that effectively reduces the resistance, but the fan could still work.
How do you test motor for burn?
To test a motor, use a megger (megohm meter) to test the insulation of the internal motor windings. Select a voltage to apply to the motor using an output from the megger that is higher that the operating voltage that the motor operates on.
Does electric shock occur in space?
An electric shock could occur in space. One thing to keep in mind about electrical shocks is that if the body provides a return path for current to flow then an electrical shock will occur. It does not matter if it is in space or on earth, touching a potential across the output supply on a high voltage system is going to short circuit the supply through you.
Why do you have 53 volts on a 120 volt panel?
You have to backtrack and see where you have 120 volts. You likely have a loose or corroded wire connection. It is very dangerous working inside a panel so you should not do this if you are at all in doubt as to what you are doing.
Many houses use aluminum service entrance cable and the aluminum creeps in the connector over time. There is an Allen headed screw that tightens this connection, but it is obviously hot and you could get killed touching this with a metal Allen wrench. An electrician would either remove the meter which disconnects the panel or use a special insulated tool and gloves to tighten the connection.
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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 JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
How do you wire a DOL starter controlled by a pressure switch for a water pump?
Answer for USA, Canada and countries running a 60 Hz supply service.
The wiring of this type of installation is quite elementary. It is all about the control voltage for the magnetic contactor and having the pressure switch in series with the contactor's coil.
If the pump supply voltage is 120 volts, take a wire from L1 on the contactor and place it on the normally closed contact point on the overload block.
From the N.C. contact on the overload block take a wire to one side of the pressure switch.
From the output side of the pressure switch contact take the wire back to one side of the contactor's coil.
Connect the other side of the contactor's coil to the neutral wire from the supply.
Now you will have three components in series with each other. The overload block, the pressure switch and the contactor's coil as the load of the circuit. When the pressure switch closes due to low pressure the coil will be energized.
If the pump motor goes into an overload condition, the overload block contacts will open and de-energize the contactor's coil and the pump will shut off.
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 JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Why would electricity go off if too many appliances are running?
Circuit breakers are in place to prevent an over-current condition. When too much current is passed through a wire, it overheats and can result in fire.
The circuit breaker is just doing its job when it turns off a circuit in that kind of condition. Too many appliances running simply means too much current on a circuit.
How much amp draw does amp gauge versus volt meter?
A meter that you find in large distribution panels only receives part of the supply voltage. The volt meters have a full scale deflection of 5 volts. The amp meters have a full scale deflection of 5 amps. These meters are supplied from, for voltage, potential transformers and for amperage, current transformers. The transformers are ratio driven so that the maximum input will always produce a 5 volt or 5 amp output.
The legend on the meter is matched to the transformers. For example, if the maximum current applied to a current transformer is 300 amps then the transformer ratio will be 60:1. So for every 60 amps the transformer detects the meter needle will move up to a position on the meter face equalling 60 amps. This is a linear movement all the way up to full scale deflection of 300 amps equalling 5 amps to the meter.
Some of these switches are easily set by using a "ball point pen" or a paperclip. If you are asking where to set the switches, I need additional specifics about the equipment.
How do you fix a water dispenser that does not cool?
First, find out what part isn't working, then replace or repair the offending component.
It could be as simple as a faulty switch, sensor, or it could be the refrigeration compressor.
Repairing anything involves the diagnostic process at least as much as the actual replacement of components.
What is the difference between Kilovolt Ampere and Kilowatt?
A kilowatt is an unit of true power in an AC circuit -as measured by a wattmeter.
A kilovolt ampere is an unit of apparent power in an AC circuit, which is the product of the voltage across a load by the current through it.
The relationship between the two is: kilowatt = (kilovolt ampere) x (power factor of load)
What should be used to clean electrical contacts?
if they are pitted you can use emery cloth and a can of contact clea.ner
