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Electrical Wiring

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4,935 Questions

What will happen if phase and neutral get reversed in power line and what action we have to take against it?

If phase and neutral get reversed in a power line, electrical appliances may malfunction, and there is a risk of electrical shock to users. To rectify this issue, you must immediately shut off the power supply and contact a qualified electrician to correct the wiring configuration. Reversing phase and neutral can be dangerous and should be addressed promptly to prevent any potential hazards.

Ways to solve unbalanced wye connection?

To balance a wye system you have to find the wattage connected to each breaker on each of the three phase legs. Total the wattages of the three individual phases legs. The difference in wattage is the unbalanced load. Then is is just a matter of deciding which breaker load should be moved to another leg to try and make all three legs as equal as possible. Working with an off and on again load wattage is sometimes hard to do because at certain times some of the loads will not be on. You should be able to get close but never right on. The only time you will ever get a completely balanced load is if the load is three phase resistance heating.

To measure the voltage in a standard household electrical socket an electrician would you what settting on a volt meter?

An electrician would use the AC voltage setting on a voltmeter to measure the voltage in a standard household electrical socket. This setting is specifically designed to measure the alternating current voltage commonly found in household electrical systems.

What is the power factor of a DC system?

It would be unity, or 1.0. Since the voltage in a DC circuit does not vary with time, there can be no phase displacement of the current waveform, and therefore the current could not lead or lag the voltage waveform.

What can 240 volts of electricity do to a person with wet hands?

240 volts of electricity can cause electric shock, which can lead to muscle spasms, burns, organ damage, and potentially death. The combination of wet hands and electricity increases the conductivity, making it easier for the current to flow through the body. It is important to always keep electrical appliances and outlets away from water and to never handle them with wet hands.

What kind of material does a magnet stick to?

A magnet sticks to materials that are ferromagnetic, such as iron, nickel, and cobalt. Other materials like steel and alloys containing these metals will also be attracted to a magnet.

If your breaker box is balanced will your electric bill be less?

No. In North America you are billed on the consumption of watts (amps x volts). Both legs L1 and L2 are monitored inside the watt-meter that is situated on the side of your house and are independent from the unbalanced or balanced load on the neutral.

How do you determine best gauge of wire to use?

There is a formula based on wire type, length, and current. The easiest way nowadays is to use an online calculator. Remember when using that calculator that both wires in the circuit count (hot & neutral), so don't divide the length by 2. Just enter the length of your run.

On a 208 120 volt 3 phase electrical system what is the color code for the wires?

208/120 is typical for the US, so these are the colors for the US: A phase: black -------------------In Canada; A phase - Red B phase: red-------------------------------------B phase - Black C phase: blue -----------------------------------C phase - Blue neutral: white -----------------------------------neutral: white ground: green or green with yellow stripe

Can I use a 220V oven with 110V outlet?

No, and if you don't have a 220v outlet, you will need an electrician to run a #8 copper wire with a direct line to the electrical panel (40 or 50 amp), depending on the oven's requirments - check the manual.

What is the height to place a light switch in New Zealand?

Answer for USA, Canada and countries running a 60 Hz power supply service.In US the max height from the floor to the top of the switch is 48". Answer for countries in Europe and other world areas running a 50 Hz power supply service.For UK current standards (17th edition) the top of the switch can be no higher than 1200mm from finished floor level, nor the bottom be less than 450mm from finished floor level, so anywhere between these that suit your needs would be fine.

The correct answer to your question will depend on the exact location of the light switches in particular if the location is subject to damp conditions, such as in a bathroom, shower room, kitchen or anywhere outside a building.

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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 is the mains voltage in your home?

The mains voltage in a typical home in the United States is 120 volts. In other parts of the world, such as Europe, the mains voltage is usually around 230 volts. It's important to note that voltage can vary depending on location and electrical systems in use.

Can you wire two 240 volt room air conditioners on one breaker?

This will depend upon the current draw of the ACs as well as the size of the circuit. My guess, based upon what 240V units tend to draw, is that you probably won't be able to, especially if the circuit is only 15 Amps. With a 20 Amp, you MIGHT be able to. You will have to check the nameplates on each unit to find what the current draw is and ADD THEM TOGETHER. And remember that AC units should be considered a continuous load. This is when a load may run for three hours or longer. Here, you must "derate " the circuit by 80%. So a 15 Amp circuit should only have a load of 12 Amps; while a 20 Amp should have a load of only 16 Amps. My best "guesstimate" is that they will need their own circuit.

Can you change a 2prong to a 3 prong on a window air conditioner?

It is not recommended to convert a two-prong plug to a three-prong plug on a window air conditioner as it may compromise safety. The third prong provides a grounding connection which is important for protecting against electrical shocks. It's best to use a three-prong outlet or consult an electrician for proper installation.

What could cause an outdoor outlet to lose power if the outlet is new and the wires are getting power and the breaker has not popped?

Most outdoor outlets are on a GFCI device. Depending on when your house was wired the outside plugs may be fed from the GFCI in the bathroom. The method used was to take the downstream side of the bathroom GFCI and run it to the outside plugs all around the house. If you want to delve into this further open a discuss question page

Holophane ballast re400mh48hrw how do i wire them and are they 120 or 220?

On your model number the figures after 400MH are the voltages for that ballast. A 40 represents 240 volts, 12 represents 120 volts and yours 48 represents 480 volts. Looks like this is a industrial fixture and not meant for residential use.

What is Ir value of a circuit breaker?

Ir is the Interrupt rating of the circuit breaker. It is the maximum amount of current the breaker can withstand without damage. In a molded case breaker's electronic trip mechanism, Ir is the continuous current rating that you select, to trip the breaker at a given overload current. Standard requirements request that the breaker trips at 2 hours with an overload of 135% and will trip as a function of I squared x time selected for higher currents.

What is an electrical ballast?

Firstly, there are a few meanings for the word ballast, and they are used in different contexts.

In an electrical context:

Electrically, It adds resistance to limit the current. In a fluorescent light fitting, the ballast adds resistance. Once the lamp conducts, it presents a very low resistance to the circuit and would draw too much current. The ballast coil also has reactance and provides a back emf pulse, to enable the lamp to fire (conduct) when it is interrupted by the starter.

In an a shipping context:

Ballast is used in ships and submarines (both new and old) to provide stability to the vessel within the water. Normally the trim of a boat in the water will differ whether it carrying a cargo or not, if the ship is lighter and higher in the water it is more inclined to roll from side to side in heavy weather. In order to prevent this ballast tanks are used in ships, these are then filled with seawater in to make the ship heavier (lower) in the water and less prone to tilting. Before the ship takes on cargo the tanks are pumped out making the boat "ride" higher in the water. Earlier wooden vessels also used ballast, but would use stones, rock or bricks for this purpose.

In submarines, ballast tanks are flooded with water or purged using compressed air in order to maintain neutral buoyancy, or to allow the submarine to ascend or descend.

In hydraulics/ irrigation terms:

Ballast tanks (sometimes called buffer tanks) are used in irrigation and plumbing systems to provide a buffer between supply and demand systems. A simple example of this is the water tank of your toilet. The system, when flushing requires a fairly substantial amount of water, the mains water supply of a typical house does not have this volume all at once, so the water is stored in a small ballast tank. When you press the flusher a larger volume of water that can normally be supplied by the house water supply is release - giving you a clean bowl.

Energy can be transferred between objects and places through many different methods what forms of energy transfer can involve energy transfer across vacuums?

Radiation is a form of energy transfer that can occur across vacuums, such as in the form of electromagnetic waves like light and heat. This is because radiation does not require a medium to propagate.

What type of circuit would be used in a battery operated torch?

A simple series circuit is typically used in a battery-operated torch. This circuit allows for the flow of current from the battery through the light bulb, providing illumination. The components are connected in a loop, where the positive terminal of the battery is connected to the light bulb and then back to the negative terminal of the battery.

Is chlorine a good or bad conductor of heat and electricity?

I believe chlorine would be a bad conductor of electricity. Not sure about the heat. Usually one would want to stick to using a type of metal and stay away from most liquids when trying to conduct electricity.

Is paint an insulator of electricity?

Paint will have the ability to block some lower voltages. Painted electrical junction boxes are required to have a conductive ground in electrical metallic systems. This is accomplished by the use of crowned locknuts that scrape through the surface paint when they are tightened onto the connector. These types of systems use the metallic conduit as a grounding medium to carry short circuits in case of an electrical fault.

How do you safely connect a 240V wiring to the fuse box?

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.

Gfi receptacle first in a line of seven other receptacles in new construction that works fine without the load of the other receptacles but does not work when you add the additional receptacles?

There must be leakage current in the down stream receptacles It is going to be a trial and error method of finding the leak. Remove the GFI and make a through connection to the downstream receptacles Now go to first receptacle and install the GFI. If it holds the fault is further down stream. Keep going down the line until you find the fault. When the GFI trips and won't reset it will be the up stream feeder. Check the feeder wire for cuts or scrapes in the insulation. Replace this feeder.

How do you wire a cooker stove oven or range outlet?

I assume you are going from electric to gas. You can derate the outlet or run a new one. You should seriously consider simply adding a new outlet behind the stove so you can easily go back to electric.