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Electrical Wiring

Ask questions here about proper wiring and electrical installation here.

4,935 Questions

What is captive generation?

i think it has to do with off grid electricity generation

Does electricity continue to flow through a table lamp when the switch is on and the bulb is removed from the lamp?

Electricity flows by any conductor.But the most used to flow electricity is copper. Now if there is any problem with a wire even if it is a conductor the electricity will not flow.
Sometimes when trying to make an electric circuit the electricity does not flow,if the wire
has no problem it is a problem with connection to make that work you just put silver paper
between the 2 wires that have a problem in connecting to the bulb or any such thing.

What does damping do in generators?

In AC synchronous generators (alternator), the rotor should turn continuously and smoothly at its rated speed. When loaded, a synchronous alternator can become unstable, that is while rolling it also begins to rock back and forth slighty (this can easily be seen with a strobe light shining on a black mark placed on the end of the shaft, the mark is stationary as the light flashes and then the mark begins to rock clockwise and counter clockwise). The reason is the load torque pressing against the magnetic field traveling around in the alternator and then bouncing off the magnetic field until it catches up again. Remember when a generator loads up by supplying electric power it also gets harder to turn, so what ever is turning the generator has to push harder. Imagin pushing a wheeled cart with a coil spring. The task could get bouncy or "boingy"as the cart runs ahead then slows down. This phenomenon may disturb the generated current waveform and maybe even cause early bearing failure or damage a steam turbine that is turning a large alternator. To stop or reduce the instability is called dampening or damping. A special damping winding is built in the generator. Sometimes called an Amortisseur winding. Roger nsc@psu.edu

How do you check double pole wiring?

Double pole wiring is checked the same way as single pole wiring. When you turn the switch on and the device works, in effect the switch is checked.

What is the current of a circuit if the voltage is 10V with a 1.2K Resistor and a diode?

you should specify:

- circuit topology, I assume a series connection.

- diode allows current flow? It depends how it's connected

- diode forward voltage drop value

if diode is in forward conduction, you have VR=10V - VDIODE and, thus, I = VR/R=(10-Vdiode)/1200.

How many current sensing devices are required by the National Electrical Code to protect a single-phase motor operated on 240 volts?

For a single phase fractional horsepower motor, only one over current device is needed in the motor feeder. This protection can come in the form of a switch which has the overload heater incorporated into it. These switches come in single and double pole configurations. Select the heater for the motors full load current that is taken from the motors nameplate. Search the web for "fractional motor starter switch".

What occurs when electrical charges build up on a surface of an object?

When you build up electrical charges on the surface of an object you get static. Static can result in a small shock if the electrical charge is given a direct conductive contact to the ground.

How do you design a shaking torch light without batteries?

You need a strong magnet, a big coil of enameled copper wire, a large capacitor, and an efficient LED. And a few odds and ends. The basic design uses the magnet and coil as a generator, or dynamo. As you shake the assembly, the magnet slides up and down past the coil, generating voltage. You rectify the AC voltage and use it to charge the capacitor. You then discharge the cap through the LED to make light.

What are the advantage of digital multi tester?

Digital testers offer usually more testing options than an analog meter. They also tend to be more accurate in their readings.

What kind of outlet is needed for a sump pump?

Outlet rating should be suitable to the rating of the motor. The type should be preferably IP 55 or higher if mounted outside the sump in dry area.

What are the steps in rewinding of three phase motor?

To reverse a three phase motor, you simply swap two of the phase conductors.

How to generate sawtooth waveform of 0 to 5V from square wave of 0 to 15V...?

You will need a regulator circuit that will change the shape of the pulse AND regulate the voltage to 5v.

What are wires made of?

Most wire is made of an electrical conducting metal such as steel, copper, brass, etc. Then to prevent electrical "shorts," a generally flexible, electrically insulating material is used to cover the wire.

What is the full form of MTD?

FULL FORM OF MTD IS million Tunisian dinar.......

What is cooking range outlet?

It is a receptacle outlet wired into a home with the capacity to handle the amperage rating of the range. The cord on the range plugs into this receptacle to receive its power supply so that the range can operate.

Would a relay be wired differently for a sourcing and sinking output module?

Yes.

For sourcing output, the relay coil is wired to (common or ground) and the output terminal.

For sinking output, the relay is wired to (voltage supply or hot) and the output terminal.

How do you calculate how to split a 7.5Kw load over 3 phases?

A 7.5 kW three phase load will be balanced by the manufacturer. When connected to a three phase source the line current on each phase will be equal.

What happens when you lose an input phase on a three phase bridge rectifier?

If the rectifier is wye connected, ripple will increase. If it is delta connected, ripple will substantially increase. Whether or not the rest of the rectifier, filter, and regulator are damaged will depend on how much current is being pulled by whats left, and by how deep the ripple actually becomes.

Can we use two wireless mouse in one computer at same time?

Yes, you can plug two mice into your computer at the same time... however both mice will control the same pointer on screen. At this moment there seems to be no easy way to set the computer to accept two mice each with there own pointer. I did some research on this a week ago.

Where are fuses for turn signal?

The fuses for turn signals, I assume you are speaking on a Geo Prism, would be located to the left bottom(to the left of your left leg) front drivers side panel.

What does the terminology - radial feed - mean in relationship to transformers?

This terminology usually refers to pad mounted transformers. A "radial feed " transformer is a transformer that has one bushing for the high voltage cable line. The high voltage cable terminates into the transformer through the transformer's bushing. There is no second bushing for the high voltage cable to continue further down the line. This type of transformer is usually on the end of a loop feed circuit.

This is different from a "loop feed" transformer whose incoming cables are terminated at the primary bushings. On this type of transformer there is a second bushing which connects to the outgoing primary voltage cables that allows the primary to feed another transformer. Each pad mount transformer's secondary feed usually supplies enough power to connect up to four homes.