0
Electrical Wiring
Ask questions here about proper wiring and electrical installation here.
4,935 Questions
for USA, Canada and other countries running a 60 Hz supply service.
Cords attached to power supplies/transformers are not permitted to be installed in or through walls. You would have to surface mount the wire, or install NM cable (Romex) if you need to hide it in the wall.
There are other wiring options as well.
<><><>
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.
400 v each phase
What is etching in electronics?
It is a process used in the making of printed circuit boards. A protective material is used to cover the traces that you want left on the PC board. The board is then submerged into an liquid that will etch the unprotected copper off of the board. This removed material then becomes the space between the protected material that you want to use for current caring traces to different components on the board.
The smart led strip has a chip for each LED, to use the strip you have to send digitally coded data to the chips. However, this means you can control each LED individually! Because of the extra complexity of the chip, they are more expensive.
What is the main part eletricity circuit?
An electric circuit is a system of several parts. The circuit cannot function without all of them therefore there is no 'main' part.
Essential parts are; power source, conducting material, load.
What is Direct online Starter and its disadvantage?
Across the line starter has a large inrush current.
What is the difference between a number 12 wire and a number 6 wire?
# 6 will carry about 40 amps more than a number 12
What are electricity pylons used for?
Pylons are there to carry electric wires which send large amounts of electrical energy across the country from where it is generated to where it is used.
Pylons usually carry electricity at many thousands of volts because this is the efficient way to transmit it. Typical voltages on pylons are 100,000 volts up to a limit of about a million volts.
The wires carried on pylons are usually made of stranded aluminium with a steel core, with overall diameters up to about one inch.
A line of pylons carrying six wires making up two 3-phase circuits and operating at 132,000 volts can carry a power of about 200 megawatts, enough for a town of 200,000 people.
What does this sentence mean fuses are the police officers of electric current?
Fuses protect an electrical circuit. When current in an electrical circuit becomes dangerously high the fuse will open protecting people and property. Police men/women protect people and property from the dregs of society.
How do you straighten a tightly twisted hair dryer cable?
To straighten a tightly twisted hair dryer cable, gently unwind the cable by holding the plug and carefully rotating it in the opposite direction of the twist. You can also lay the cable flat on a surface and pull it straight while applying slight tension. If the cable remains twisted, you can warm it slightly with a hair dryer to make the material more pliable, but be cautious not to overheat it. Finally, store the cable loosely to prevent future tangling.
Can you legally make a homemade lamp using UL parts and sell it if you're not an electrician?
you can, but you need to be worried about a lawsuit. If something were to happen, lets say the house of the new owner burned down, you would get sued for the damages and probably more. You would probably need to put a disclaimer on there or something. Maybe even record your customer saying he will not sue if anything were to happen, that evidence would definitely hold in court
What is the effective voltage for 3 phase 220 VAC power?
If, by 'effective' voltage, you mean 'root-mean-square' (rms) voltage, then 220 V is already expressed in those terms.
Unless otherwise stated, a.c. voltages and currents are always expressed in rms values.
Can you charge your 19V 3A laptop using a car battery and a 3.9ohm 35W resistor?
No, because a car battery only has a 12 volt DC output.
In a 480 volt wye connection you obtain two voltages, 277/480 volts. Any leg to grounded wye point will give you 277 volts. Between any of the legs to each other you will receive 480 volts. Any two legs of a three phase system is classified as single phase supply. From a 480 volt central distribution panel install a two pole breaker sized to the amperage shown on the welding machine. Be sure to use the input current and not the output current to find the correct feeder for the unit.
Can electricity travel through a fibreglass axe handle?
No, fiberglass is an excellent insulator. In fact so good that linemen from the utility company use fiberglass tools when handling "hot" primary lines.
How much does 140 foot of 300 mcm weigh?
A 1000 feet of 300 MCM wire weighs 1021 pounds. It is easy to calculate from there.
What do you call a metal clip that connects wires in a circuit?
There are various names and types -
Bug
Crimp Connectors
Butt connectors
Wirenuts
Etc.
The connectors would typically be insulated unless they were use for grounds.
Which are two most common graphic file types on the web?
Depends on what you mean; either jpeg and png, or hardcore porn and murder videos.
How do you operate and computation of megger tester?
On the whole megger testing is non destructive. What happens is a DC voltage is applied to the device or winding under test. It is an insulation test to see is the insulation has been injured in any way to cause a short circuit when normal power is applied to it. On my megger there are 3 ranges 300V, 750V, and 1000 volts. Applying the proper voltage is essential to not damaging the device you are testing. Working voltages up to 240 volts should use the 300 range. Working voltages up to 600 volts use the 750 volt range and working voltages above 600 use the 1000 volt range. As you can see if you used the 1000 volt range on a device that had a working voltage of say 24 volts you could damage the insulation just by testing it. So meggering a device is non destructive if you use the tester as its instructions tell you to.
How can a single phase motor be rotated clockwise and then anticlockwise without any delay?
It can't, this is called plugging. The motor should come to a complete stop before reversing its direction. The heat build up in the rotor becomes excessive when plugging and should be used with discretion.
See related links below.
What is the function of service fuse?
main circuit started with electricity supply flowing through the service fuse
What takes place when the energizing of a chime circuit as the push button is pushed?
- Electrical current in solenoid creates a magnetic field.
- Magnetic field in solenoid pulls in armature.
- Armature causes striking mechanism to produce first chime of bell.
- Interruption of electrical current in solenoid causes magnetic field to collapse.
- Spring pulls armature out of solenoid.
- Armature causes striking mechanism to produce second chime of bell.
Electronic doorbell chimes work differently, offering more options.
