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Electrical Wiring
Ask questions here about proper wiring and electrical installation here.
4,935 Questions
Why do you need to keep your computer plugged when replacing a CPU?
You don't. Actually it is imperative that you UNPLUG your computer before trying to change your CPU. In addition, you need to make certain that you are grounded before you attempt to replace the CPU to avoid static discharge.
Continuing on this from Original poster:
I have been told by guides and other sources that you do keep the computer plugged in.
Should a 3 phase system have the same Z readings on all phases?
It's desirable but not essential. For devices such as motors, then the impedance of each phase would normally be identical. But for separate, independent, loads, while it would be ideal, it's rarely the case.
Can a 125 HP 3 phase 460 volt saw be started with an across the line starter?
CAN and WILL BE ALLOWED TO are different questions.
Whether or not the motor CAN be started across the line will depend on the available short circuit current (SCC) at your location on the local utility's power distribution grid, and the rating of your service transformer. Check with your utility company. It may be possible to start the motor across the line, based on the transformer rating, but if there is not enough SCC, the utility will not allow you to connect the load without a starter or variable frequency drive system.
Start stop station wired to a motor?
There is a wide variety of start stop stations for various applications. The wiring diagram or schematic for even the simplest ones are far too complicated to describe in words and I'm unable to draw you one on my computer. You can find these schematics on various manufacturers websites. Try: ab.com/manuals this is Allen Bradleys site, a major manufacturer or check out websites for the Square D company and Cutler Hammer, two other major ones.
What is the potential difference across a single 4 Ohm resistor if the source voltage is 230v?
the potential difference across the single 4ohm resistor is 230volts.
Why would a 110 motor runs slowly backwards?
It depends on if the motor is an AC motor, or DC motor. DC motors only run backwards when the voltages get crossed between + and -.
Who was the first electrician?
i do not know but you can go to the library and get lots of books in a library.Did you know there are so many books in a library.Did you ever go to a library?
Why the generation voltage is 11kv not 10kv?
Alternator output voltages are typically restricted to around 25 kV to limit their physical size and the centrifugal forces to which they are subjected. In the UK, this voltage is then typically raised to 400 kV for transmission.
The voltages to which you are referring to are typical of the voltages used in the UK's high-voltage distribution system. 'Grid' substations typically transform transmission voltages of 132 kV down to 33 kV (or, less commonly, 66 kV), and 'primary' substations then transform distribution voltages of 33 kV down to 11 kV.
What are the advantages and disadvantages and applications of a sound activated switch?
it can be used to switch on/off any electrical appliances
How is a circuit-powered test light used?
First make sure the test light is rated for the voltage you are working on. Don't use an automotive 12v test light in your home wiring.
A simple test light has a test lead and a ground clip. You attach the ground clip to a known ground point (a bolt on the chassis of a car, or the - battery terminal). You then simple touch the test lead to the area being tested. If the light illuminates, then there is power there, if not, then there is not power there.
A tilt switch is commonly used at the end of a conveyor system. Where product is dropping off the conveyor and into a pile, the pile height can be governed by the tilt switch. The switch is a vertical device that hangs at a level that the conveyor should be shut off at. When the pile pushes the tilt switch 5 degrees out of plumb a mercury switch inside the tilt switch operates and shuts off the motor to the conveyor.
Changing the voltage is done by using a transformer. These voltages are dangerous and the job should be done by an electrician who knows the safety regulations that must be followed in your country.
What is the reason for a grid voltage high?
There are strict standards relating to this. You should look up the standard that your power entity is under. With that said, a typical maximum may be 103 - 104%.
Five 60 ohm resistors are connected in parallel What is their equivalent resistance?
1/R = 1/60 + 1/60+ 1/60+ 1/60 + 1/60
1/R = 5 / 60
R = 60/5
R = 12 ohms.
Usually this would be the speaker in the handset of a traditional phone. Unscrew cover and check for broken wire.
If it is an electronic phone check that volume is turned to max under settings feature.
If the dryer is a clothes dryer then the short answer no. If it is a hair dryer then there might be a voltage switch on the handle that allows you to change voltages. If the manufacturer of the clothes dryer specified that it can be operated on dual voltages then it is just a matter of changing a few terminal connections. Check the instruction manual to see what it states there. This is very unlikely though. In North America all clothes dryers need 120/240 volts to operate. The 120 volts is used for the timer relays and for the drum motor, the 240 volts for the heating elements in the dryer.
By changing to a higher voltage, it will not speed up the speed up the drying time. It is more likely that if you plug the dryer into the 240 volt receptacle it will burn the 120 volt motor out.
