Electrical Wiring

For a 7.5kW motor, you would typically use a fuse rated for around 25-30 amps. The exact size may vary depending on the specific motor and starting requirements, so it's best to consult the manufacturer's recommendations or a qualified electrician.

Its called a bi-metallic switch, which switches off when the kettle boils, as the switch is made from two layers of different metals, which expand at different rates when heated, which causes the sandwich of the two metals to "bend" when it heats up.

This isn't an answer- it's from the questioner :) Just to clarify: This is the small, apartment-sized, stacked washer-dryer unit. They used to commonly come in 110V. They are still out there but old and sell for same price used as the used newer 220V. So we'd like to buy a newer used 220V and convert if possible and safe. Don't know the watts on these, tho. But must not be as large as regular sized dryers?

This is not a cut and dry answer as it depends on the application. 240v only needs two wires to operate with a green (ground) for safety. Single phase (residential) 240 wires are generally black and red (or a red tracer), but the National Electric Code does not stipulate the colors (as long as they are not green or white). Three phase colors are generally black, red, and blue and also require a green ground (as does EVERY electrical application). The white wire is a grounded conductor. It is only used in 110v applications. For 240v home appliances such as ranges or dryers, 110v is required for the controls so the cable would contain a green (or bare) ground, a white (for the 110v, and a black and red for the 240v. Things like water heaters that don't require control voltage don't need the white wire.

Pinky

AC reverses its flow direction 60 times every second (In North America). The physical act of stopping and reversing flow direction necessitates that 60 times each second there is no current flow (as it stops to reverse direction). When you have either two or three hot wires that have differing "stop" times from one another, they are out of sync, or PHASE with one another. In commercial installation, you could have three phases (A, B, and C). In a residence you only have two. Confusingly, this is referred to as Single Phase. That's because most house wiring is 110v and you only need 1 of the hot wires (or phases) for a 110v circuit. There is a true A, B, and C phase, although few pay attention to it (or even know about it). Phase hook-up rarely comes into play unless you are running a 3 phase motor. If the phases are in the wrong order, it will run backwards. To fix it, switch any two phases. Whether they are in true A, B, C order doesn't matter.

Pinky

Wires sag in summers due to the increased temperature causing the metal to expand. This expansion causes the wire to elongate, resulting in sagging. This phenomenon is more pronounced in hotter temperatures as the metal becomes softer and more pliable.

It is usually A capital S with a lowercase 1 out beside it. S1

Copper is the main metal used for this purpose.

To create a 220 volt connection using two 110 volt lines, you need to connect them in series. Ensure the two 110 volt lines are out of phase (provide opposite polarity) and then connect them together. This will result in a 220 volt supply for your concessions stand. It's important to consult a professional electrician to ensure proper wiring and safety.

It is not recommended to rewire a 240v lamp light fitting or appliance to operate on 110v. This can be dangerous and may lead to overheating, electrical fires, or damage to the device. It is safer and more practical to use a voltage converter or purchase a new device designed to work with 110v.

You can get an electrical shock when touching a propane tank due to the buildup of static electricity on the tank. The flow of gas causes a transfer of charge, similar to what happens when you walk across a carpet. When the charged item comes into contact with an item of different charge, such as ground or your hand, current flows to equalize the charge and you see a spark and/or feel a jolt of electricity.

You can also get an electrical shock from a propane tank if you are also touching something, and the tank and that something are not at the same voltage. This is a ground fault, which must be corrected, otherwise there is risk of electrocution.

Yes, a 230-volt appliance should work fine on a 220-volt outlet in South Africa. The small difference in voltage is usually within the tolerance range of most appliances. However, it's always a good idea to check the appliance specifications to ensure compatibility and avoid any potential damage.

A phase-to-ground fault is a type of electrical fault that occurs when one of the three phases of a three-phase power system comes into contact with the ground or a grounded surface. This can result in high fault currents flowing through the system, which may lead to damage to equipment and pose a safety hazard. Protection devices such as fuses or circuit breakers are used to detect and clear these faults to prevent damage and ensure safety.

There are two types of loop antenna used in radio, small and large. It is a loop of wire usually circular or square with the circuit (transmitter or receiver) connected at the two adjacent open ends.

A large loop is one wavelength in circumference and radiates a wave along the axis of the loop. It can also be thought of as a folded half-wave dipole.

A small loop also known as a magnetic loop is one tenth of a wavelength or less in circumference and radiates in the plane of the loop. Used as a receiver, a small loop gives an output signal voltage proportional to the magnetic component of the arriving radio wave.

Small loops for receiving can be made from a coil of wire on a ferrite rod, and this type of loop is also called a loopstick antenna.

Intermediate-sized loops have a rather unpredictable pattern so tend not be used.

It can. Most electronic items now days are sold with the on and off switch turning off a portion of the electronics only. There is usually a slight draw constantly. Add all the devices that do this in your house and it can amount to a small savings in electricity if you unplug when you are not using an item. However, devices that need a "keep alive" memory will lose that memory when unplugged such as the preset station buttons on a stereo. You will have to reprogram them in when you restart the device.

Yes, GFCI devices are available for use on 240-volt, 480-volt, and 600-volt circuits. They come in different voltage ratings to suit various electrical systems and provide protection against electric shocks by quickly shutting off power if a ground fault is detected. It's important to ensure the GFCI device is rated for the specific voltage of the circuit it will be used on.

The voltage isn't a problem, you can run 220 from your house and use that to run a European appliance, the problem is whether the appliance is dependant on line HZ. European is 50HZ and US is 60HZ. If the appliance specifies 220/50HZ, it will probably give you trouble here. If it says 220V/50 or 60HZ