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Electrical Wiring
Ask questions here about proper wiring and electrical installation here.
4,935 Questions
What is the difference between a galvanometer and a multimeter?
A galvanometer is a metering device specially built to measure very small electrical current, in other words it is an ammeter. A multimeter measures more than one electrical parameter. Most multimeters measure voltage (volts), current (amps), and resistance (ohms). Some more advanced multimeters also may measure frequency, duty cycle, decibels, and more.
The formula you are looking for is I = W/E. W = kW x 1000.
D= Description
I=Including
A=Authentic
G=Genre
R= Representing
A=Acquired
M= Measurements.
What is the difference between ac and dc grounding?
The difference AC and DC grounding is that AC is alternate current and DC is direct current. Grounding for both AC and DC is the same.
What effect would occur if the intermediate switch s3 were replace by a double pole switch?
You seem to be referring about a 3 way lighting circuit. If the cross over switch is replaced with a double pole switch, depending on how the switch was wired into the circuit, the load lamp would either stay on or not light at all. A circuit in a three way configuration has two traveler legs between the two switches The intermediate switch in the circuit just switches the two traveler legs from open to close depending on the position of the other two switched. Google, three way switching, they have many diagrams to work from.
What are advantages in THREE phase UPS over SINGLE phase UPS?
You need to match the UPS to the service. If it is three phase you need a three phase UPS, and vice versa for single phase. It isn't a case of being better, it is a situation where you need to match your application.
A reddish-orange element used for electrical wiring?
Copper is a reddish brown element used for electrical wiring as it is a good conductor of electricity.
What name is given to the property of metals that allows electricity to pass through it?
I believe its a conductor, because an insallator is like a stirofoam cup for example, as it keeps the heat in the cup without burning your hands. An example of a conductor is a piece of metal because it is able to pass an electric current through the metal.
What are the examples of technology livelihood education?
1. Home Economics
2. Agricultural Arts
3. Entrepreneurship
4. Industrial Arts
itama nyo nalang kung mali sagot ko
Water can decrease a substance's resistance to the flow of electricity?
A item's resistance is not able to be changed with water. Water on an object or absorbed by an object can change the overall resistance of an object by putting in parallel the resistance of the water itself. If you were to use very clean water that was deionized and soaked your device, you would see no resistance change.
Elements that are usually dull in appearance and poor conductors of heat and electricity?
There are 17 nonmetals in the periodic table, and they are characterized by four major physical properties. 1. They rarely have metallic luster.
2. They are usually gases at room temperature.
3. Nonmetallic solids are neither malleable nor ductile.
4. They are poor conductors of heat and electricity.
What electrical safety devices can be reset and used again?
An electrical safety device that can be reset and used again fits the description of an electrical circuit breaker.
When current and voltage are 90 degrees out of phase what is the power?
Power in an electric, AC circuit is the product of Volts, Amps, and the Cosine of the angle that separates them. When the Amps lag behind the Volts by 60 degrees, the product of Volts, Amps, and the Cosine of the angle between them provides half the power that would otherwise be available without the 60 degree angle. At 60 degrees, the cosine is 0.5 and at 90 degrees it is zero. So the product of Volts and Amps whenever they are 90 degrees out of phase will result in zero power.
Write one volt equals 1,000 millivolts at the top of your paper. This is the standard conversion of volts to millivolts.
Write down the number of volts you need to convert in decimal form. For example, if you have four volts, write 4.0.
Move the decimal point over three times to the right to convert your amount of volts to millivolts. For example if you have 4.0 volts, you would have 4000 millivolts.
What is the standard direction of rotation of electric motor?
standard direction of rotation of an induction motor is counterclockwise when looking from the front end i.e. non-driving end of the motor.
Does the short circuit mean the electricity takes a shorter course?
Electricity is lazy by nature & it will always find the path of least resistance. Many times this path is also the shortest distance path from a positive charge to a negative charge, but not necessarily, it must also be the least resistive path. Typically, a short circuit is a case where a piece of metal connects two points of different voltage potential together, thus bypassing the rest of the circuit and creating a "short" in the circuit.
What does 10-32 vdc power source mean?
It means that
a)the the power source gives outputs between 10 and 32 volts DC current
OR
b)The device needs beteen 10 and 32 volts DC current
Learn how to use a voltmeter, or at least a neon test lamp, and check those wires out before you touch any of them!
That said, the bare wire on your fixture should connect to the green ground wire in your electrical box. The white neutral wire should go to the white, and your black (hot) wire for your fixture probably goes to the black wire in the box - you will need a voltmeter to take readings of the potential between the neutral and the black, then the neutral and the red, and see if the black or red is controlled by the the switch.
The Black wire may be a "hot traveler" wire coming from the lighting circuit breaker on the main panel. The Red wire may be "switched hot" coming from the light switch for this light fitting. The white wire may be a Neutral coming from the main panel. The Green wire should only ever be a safety Ground wire coming from the main panel.
Or there may be a two-way switched circuit feeding that light. If it is a light near some stairs and you have 2 switches controlling it, one switch downstairs and another switch upstairs, then the wiring could well be as follows: the Red (or the Black) is a "hot feed" to the switches and the other one, the Black (or the Red) is the "hot return" from the switches.
However you must not just assume any of these suggestions about wiring colors is correct for your house.
If you don't know how to check these things safely
DON'T DO IT - YOU COULD KILL YOURSELF!
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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.
What causes the ac fuse's to keep blowing out all the time?
The device that the fuse is protecting is causing the fuse to blow. It could be in the conductors that feed the device. Disconnect the device and see if the fuse blows. If it doesn't, then the wiring to the device is good. If the device is a motor load it could be seized bearing that cause the problem. With the rotor stalled the current will go high and blow the fuse. If you know an electrician, see if the device can be meggered to see if the internal wiring has gone to ground and is short circuiting as this will also cause a fuse to blow.
Does a 208 volt outlet need a neutral?
No a 208 volt outlet does not need a neutral. 208 volts is the line voltage between any two legs of a three phase 208 volt system.
