Electrical Wiring

For convenience I install the receptacle just above the backboard of the dryer. This way if the dryer is to be moved out of its location it can be unplugged before the move is started. Sometimes the dryer is located in a confined space and it is hard to reach down to the floor level to unplug the dryer with out becoming an acrobat.

Yes, a 230 volt electric motor can run on 208 volts. The horsepower will be lowered by .9 or to 90% of the nameplate rating. e.g. A 230 volt 10 HP motor will only produce 9 HP at 208 volts.

Note: If motor sees a load equal to its' rated HP it will over amp and shorten the live of the motor and/or trip out on internal overload.

No, a single pole switch cannot replace a starter in a fluorescent lamp. The starter is required to initiate the flow of current through the tube, which a switch alone cannot accomplish. The switch is used for turning the lamp on and off once the starter has activated the lamp.

For questions of this type, it seems the main issue may be one of definitions and industry terms. See if this makes sense:

Line voltage is a very ambiguous term. For instance, say you are wiring a doorbell transformer. You feed 120V into the primary, and 18V comes out the secondary. The electrician would say the output is "low voltage" and the input is "line voltage". He simply means the building wiring, or "lines". Now, if you go out to the breaker panel, you will measure 120V from each "leg" to neutral, but you can also measure 240V from leg to leg. It's all line voltage. Line voltage simply means the voltage present in that particular power distribution system.

Now the power in your house is "single phase" (well, in almost all homes, anyway). Single phase is fine for most anything, but motors are a special case. Motors need something to create a rotating magnetic field to get them turning. Single phase power doesn't have anything to do that, so they need some sort of a gimmick, like a capacitor, to create a "phase shift" to get the rotation.

Single phase AC (alternating current) simply means the voltage goes positive then back down to zero, then negative then back up to zero. That's one complete cycle. The cycle is divided into 360 degrees, like a circle. The positive voltage goes from 0 to 180 degrees, and the negative half 180 back to 0.

Now 3-phase power has, you guessed it, 3 hot wires. Each hot wire, when paired with a neutral, is a single-phase source. Heres the big difference: Phase A starts its positive cycle. When it is 120 degrees into the cycle, phase B starts going positive. When Phase B is 120 degrees finished with its cycle, phase C starts going positive. When phase C is 120 degrees into its cycle, that's a total of 360 degrees, and phase A is done with one cycle, and the whole process starts over. Picture 3 people doing "the wave" at a football game. Same principle.

This time difference, or "phase shift" is what makes 3-phase power unique. 3-phase motors use the phase shift directly to produce the rotating magnetic field they need to turn. Think of 3 people in a circle, tossing a ball around. see the "circular" motion? Now picture two people tossing the ball back and forth. No circular motion there. That's the difference between single-phase and 3 phase.

So, electricians use the term "phase" to refer to one of the three hot wires in a 3-phase (also correctly called multiphase or polyphase) power system. The term "phase" voltage is just as ambiguous as "line" voltage. To be accurate, you must specify whether you mean phase-to-phase voltage, or phase-to-neutral voltage.

Confused? if you go into a large commercial building with 3-phase power, many times the incoming panel will have voltmeters on the front. In one building, the first meter will be labeled "phase-to-phase voltage", and the second meter will be labeled "phase-to-neutral voltage". Go into the building NEXT DOOR, and the same meters will be labeled "line-to-line voltage" and "line-to-neutral voltage". See? the terms are used pretty interchangably.

In a 3-phase system, each phase, leg, or line has the same potential, or voltage (except for a very few wierd and pretty outdated systems). If you measure from phase A to Phase B you will get the same reading as B to C, also the same as C to A. So, measuring any two phases will tell you what the line voltage is, but that motor still needs all 3 phases to get the rotation.

To understand the different voltages you find in a 3-phase system, see the related questions for another answer that relates to that subject.

If a 120V 60Hz 7W adapter is plugged into a 240V outlet, the adapter is likely to be damaged or potentially cause a short circuit. The voltage is double the adapter's rated capacity, which can overload the internal components and may lead to overheating, sparks, or burning. It is recommended to use a voltage converter to match the adapter's input requirements with the power source.

No, single-phase 200V from Japan cannot be directly used with two-phase 120V/240V in the US. The voltage and phase differences between the two systems make direct compatibility impossible. A voltage converter or transformer would be needed to convert the electrical supply to match the requirements of the equipment.

It is done by connecting the neutral to earth at the transformer that produces the three-phase supply.

If the three phase wire supply equal currents, there is no current in the neutral wire and its whole length stays at earth potential, but if there is current in the neutral it produces a small voltage on the neutral at places away from the transformer.

The reading on the 3-ph meter would equal the sum of the three separate readings on the single-phase meters.

The neutral sides of the single phase meters do not need to be connected to the neutral wire as long as they are connected together.

The ball drop in Times Square on New Year's Eve is typically broadcast on multiple channels in the United States, including ABC, NBC, Fox, and CNN. It is also often livestreamed online for viewers around the world.

You can watch the ball drop on New Year's Eve in Times Square on multiple networks, including ABC, NBC, and FOX. These channels typically broadcast the event live as part of their New Year's Eve lineup.

The red wire is typically used for the live or hot wire, and the black wire is commonly used for the neutral wire. The specific wire connections may vary depending on the electrical circuit, so it's important to consult a professional electrician for proper installation.

Yeah Osram Sylvania is one brand, but Sylvania is also dealing with Havells which is known as havells Sylvania & according to the market survey Havellls Sylvania is having a strong Platform in market these days as compare to Osram Sylvania.

Couple of days back I was reading an article in electronics magazine about the same comparison there they discussed about the Phillips, GE and Havells Sylvania and at the end of article it was declared that Havells Sylvania is the top brand among these three. Hope its the answer of your question.

Shopkeepers using Havells lights could be due to various reasons. Havells lights may offer good quality at a reasonable cost, making them a popular choice. Additionally, they might be energy-efficient, providing cost savings in the long run. Shopkeepers may also prefer the brand for its reliability, durability, and overall performance.

If the primary and the secondary windings of the three phase transformer are connected in delta, you cannot get a healthy neutral from it but why bother? You simply drive a rod into earth and use it as a neutral. Alternatively either the primary or the secondary windings must be connected as star and you use the common point as neutral.

Assuming it has the average appliances, heating and cooling systems, electrical outlets, etc, 200 amps should pull it, depending on the heat and air conditioning systems used.

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A 200 amp panel is the norm these days for an ordinary 2000 sq. ft. home. A home of 4700 sq. ft. would take a 400 amp service.

Calculations on a house sometimes can be complicated, assuming standard equipment and all electric, I came up with a load of 218 amps. You could then use a 250 amp service. Use gas for heating and you could fall around the 200 amp size.

No, a single pole switch is not designed to function as a dimmer. Dimmer switches are specifically designed to control the amount of electrical current flowing to a light fixture, allowing for adjustable brightness levels. Using a single pole switch as a dimmer may cause damage to the switch, light fixture, or both.

No, aluminum is definitely in a solid state when it conducts electricity.

No, a GFCI outlet is designed for use with standard 120-volt circuits. Attempting to use a GFCI outlet with a 240-volt split circuit could cause damage to the outlet, the circuit, and could present a safety hazard. It is not recommended to use a GFCI outlet in this manner.

red = positive black or blue is negative and green and yellow = earth

In the USA, black is considered L1 (or load 1). Red is considered L2 (or load 2). White is considered neutral, and green is considered ground or earth.

White can sometimes carry the L1 or load, as in a return from a switch. Normally an electrician places an identifier on the white wire to note that it is carrying load.

The conductors that connect a three-phase supply to its load are called 'line conductors' or, more simply, 'lines'. The individual generator stator windings, transformer winding, or loads are called 'phases'.

Lines and line terminals are identified by colours, letters, numbers, or combinations of letters and numbers. For example, A-B-C. Phases are identified by using the letters assigned to the line terminals between which the phases are connected, e.g A-B, B-C, and C-A.

Voltages measured between lines ('line-to-line') are termed 'line voltages', and currents that pass through the lines are called 'line currents'.

Voltages measured across a generator's windings, transformer windings, or individual loads, are called 'phase voltages', and the currents that pass through these are called 'phase currents'.

For a three-phase, three-wire, system, the phase- and line-voltages are numerically-equal to each other. For a three-phase, four-wire, system, the line voltage is 1.732 times larger than the phase voltage.

To change the connection of a single-phase line to a three-phase line for a DC motor, typically you would need to use a phase converter or a variable frequency drive (VFD) to convert the power supply. This will allow you to provide the necessary three-phase power to the DC motor for it to operate efficiently and safely. It's important to consult with an electrician or engineer to ensure the proper conversion is done based on the motor specifications.

A multimeter is commonly used to measure electrical pressure in a circuit. It can measure voltage, current, and resistance, providing a comprehensive view of the electrical characteristics in the circuit.

A CONTACTOR SHOULD NOT BE USED TO START A 3-PHASE MOTOR unless there is some sort of motor protection in series with it. You would need a 3-phase contactor and just connect each phase (1 wire) to each terminal of the line side of the contactor, and the 3 wires to the load side. 3 wires on the line side, and 3 wires on the load side.