Electrical Wiring

It is hard to tell what is going on from your description since you didn't indicate how measurements were being made. The only time I have seen something like this going back to breaker was when there were two separate breakers providing voltage to the box.

One way to find out is turn off all breakers and there should be no voltage to the fan box. Then turn breakers on, one at a time while monitoring the voltage at box (two people are helpful). If the breaker you think controls the box shows a voltage when turned on, turn it off and try the rest of the breakers to see if any of them provide voltage to the box.

If all breakers are off and you still have power in the box and you live in an apartment or duplex of some sort, maybe you are tied into a neighbor's power.

Only other answer is if power is coming from main and is un-switched. This would be very strange.

No, it is not possible to connect a 3-phase 440 V system without a neutral line to a machine that requires a 3-phase 4-wire connection with a neutral line. The neutral line must be present in both systems for proper operation and safety. Trying to connect them without the neutral line could cause damage to the machine and pose a safety hazard.

Two phases are at equilibrium when the rate of their interconversion is equal in both directions. This means that the amount of substance transitioning from one phase to another is the same in both directions, resulting in a stable balance between the phases.

No, 240 volt appliances from New Zealand cannot run on 240 volts in the US. The electrical systems in these countries are different. Appliances intended for use in New Zealand are designed to operate on 230-240 volts at 50 hertz, while in the US, the standard voltage is 120 volts at 60 hertz. Using a 240-volt appliance from New Zealand in the US without a voltage converter or transformer could damage the appliance or pose a safety hazard.

Circuit breakers do the same thing as fuses. They interrupt current flow when a certain preset point is reached. The difference between circuit breakers and fuses are that circuit breakers are resettable and reusable, whereas fuses are one time devices that must be replaced after they blow.

In the US older 2-conductor house wire has a white-insulated and a black-insulated wire. The white wire is the neutral and the black is the hot wire. Newer house wire has a third bare copper wire to serve as the ground wire. Insulated ground wire has a green jacketing on it. Red wires are for switch legs. You want to be sure that whomever did the wiring didn't flip the colors around. You can do this by checking the fuse or breaker box - the white or neutral wires should all run to the multi-neutral ground bus bar and the black or hot wires should each go to their respective circuit breakers or fuse sockets. On your switches and recepticals, the gold screw is for the black, or hot wire, and the silver screw is for the neutral. The green screw would be for the ground wire. Mostly, use a qualified electrician to do any work unless you are quite handy, have all necessary tools and fully aware of all safety precautions and code requirements that may exist where you live.

The answer depends on which gauge you are asking about: if it is a thermometer, it could be used to measure the oven temperature.

If it is part of a clock/programmer, it tells the time of day and can be used to switch the oven on and off automatically.

Does not matter. But in a practical sense Its cheaper to get heat from high voltage because smaller wire, smaller breakers, and definitely less heat loss from the circuit wiring. It's called ixiR loss. Same reason overhead transmission lines are obcenely high voltage values.

It is all relative. Heat equals this times that. Lower this, raise that. Horsepower equals this times that. Lower rpm, raise torque or vice versa.

Navy wants planes to fly faster, lose weight, raise hydraulic pressure, reduce hydraulic line size. Electric, hydraulic, mechanical, it's all equal.

On a 20 amp breaker, you can safely operate devices that consume up to 2400 watts (20 amps x 120 volts = 2400 watts). Exceeding this limit can trip the breaker to prevent overheating and fire hazards.

The biggest circuit breaker in any home is the main breaker located in your main breaker panel that is installed where your electrical service cable comes into your home.

Single phase rectifiers are suitable to power loads of up to only about 15 kW.

For higher power demands, three phase rectifiers are preferred for the following reasons:

Higher dc voltage, better TUF, better input power factor, less ripple content in the output current - therefore giving better load performance and a smaller size of filter circuit parameters because of the higher ripple frequency.

No, it is not necessary to have three-phase rotor windings for a transmitter and motor in a selsyn motor. Selsyn motors typically use single-phase rotor windings to transfer information or control signals between devices. The synchronization between the transmitter and motor is achieved through the interaction of the stator and rotor windings.

A typical 15-year-old refrigerator from the 90s consumed around 1,000-1,500 kilowatt-hours of electricity per year. These older models were less energy efficient compared to modern refrigerators due to advancements in technology and energy-saving features.

If the wire shorted out, it's possible that other components in the range could have been damaged as well, such as fuses, circuit boards, or heating elements. It's important to have a professional inspect the range to determine the extent of the damage and make the necessary repairs. Using the range without addressing the problem could be a safety hazard.

When connecting two alternators in parallel, it is important for their voltages to be in phase. This means that the peaks and troughs of the voltage waveforms from each alternator align, ensuring a consistent and stable output. If the voltages are directly out of phase, it can lead to destructive interference and potentially damage the generators.

Quarters are made of a combination of nickel and copper, which are better conductors of electricity than the zinc core in pennies. The higher metallic content in quarters allows for more efficient flow of electric current compared to the lower metal content in pennies.

The green (or green with yellow strips) is for Earth. This is the D shaped socket in a US outlet. The Black (US) or Brown (UK) is for Live. This is the narrow rectangular socket on a US outlet. The White (US) or Blue (UK) is for Neutral. This is the wide rectangular outlet on a US socket. The color code may vary for other countries, so be sure to check.

A heterogeneous mixture, such as a salad with different vegetables, cannot be considered a single phase. It contains distinct regions with different compositions and properties, making it a multi-phase system.

The standard voltage for electricity supply in household buildings in Singapore is 230 volts.

Center tapped transformers are used in North America to be able to use two voltages from the transformers secondary. It is known as a three wire system. Appliances circuits that utilize 240 volts and appliances that use 120 volts can be supplied from one transformer. The transformers secondary is center tapped and grounded. This allows the 240 volt winding L1 - L2 to produce 120 volts from one leg of the winding to ground L1 - N and the second half of the winding 120 volts from N - L2.

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Center tapped transformers are used anywhere world wide where ever they were designed to be used.

There is nothing particular to a center tapped transformer that makes it more or less suitable for use in North America.

Only in some cases. Electricity can be conducted by a liquid containing electrolytes, or dissolved ions. Deionized water will not conduct electricity, however a solution of salt, or any other ionic substance, will.