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50 Hertz Industrial Electricity

All of Europe and most of mainland Asia and Africa use 50Hz frequency for their industrial electrical needs. Industrial motors operate better at this frequency, since the voltage drops could be easily maintained.

467 Questions

What is theLife time of the electric motors?

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Asked by Wiki User

I dont think any sane person would care. :p

How do you size a junction box for an angle pull an a straight through pull?

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Asked by HarryCharles

the reproduction of plants trachea enzymes bronchi spiracles capillaries in junction box

The frequency of electrical supply is measured in?

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Asked by Wiki User

Electric energy used in homes is measured using a kilowatt hour meter. This is the meter that is found on the outside of your home just below where the utility company makes a connection to your house.

What is the basic function of PLC?

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Asked by Wiki User

PLC or programmable logic controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly line, amusement rides, or lighting fixtures.

What is the capacity of a 35mm2 cable?

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Asked by Wiki User

Current carrying capacity is different for aluminum from that of copper cable. Under different conditions like, type of insulation, number of conductors, in conduit, underground, in air, single or multilayer, system voltage, the current carrying capacity varies a bit. Hence You must refer a standard chart from a reputed cable company.

Who invented alternating currents and transformers?

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Asked by Wiki User

Nikola Tesla invented AC, probably a transformer as well but don't quote that.

What is the current carrying capacity of 185 Sq mm?

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Asked by Wiki User

As a rough estimate, for medium voltage cables directly buried in earth, I use 2 A / mm^2 for copper conductors, and 1.2 A/mm^2 for aluminum conductors.

However, the installed capacity of a cable is mostly dependent on how much heat can be dissipated to its surroundings, and ultimately the maximum temperature of the insulation material.

For this reason, it is important to know how the cable will be installed, what conductor is used (Al or Cu), the cable insulation (for both thickness and operating temperature limits), soil thermal resistance (if buried), and if there are other heat sources (cables, process pipes, incident solar radiation, etc) are nearby.

There are several cable manufacturers that provide reference current ratings for nominal installations. Check Nexans, Prysmian, or Okonite (US dimensions).

Where is an mpcb used?

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Asked by Wiki User

Motor protection circuit breakers(MPCB) are a specialized type of electrical protection device that is designed specifically for electric motors, like their name implies. Electric motors have plenty of applications and are used to drive mechanical devices of all types, so it is very important to protect them adequately with MPCBs.

What is plain tap?

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Asked by Wiki User

this used where the tap wire is under considerable tensile stress circuit

What is locked rotor current?

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Asked by Wiki User

"Locked Rotor Current" also called LRA which stands for Locked Rotor Amps, is commonly found on electric motor nameplates. Locked Rotor essentially means the motor is not turning. The current or amps in this case have to do with the amount of electrical energy required to start the motor. At the instant the motor is switched on, it is not turning, and draws the maximum current. As the motor starts to turn, the current goes down. This required energy is much greater than the Full Load Amps or Running Amps, which is the current drawn when the motor is running at normal speed under full load. The current required to start the motor will depend on the type of motor as well as the specified design voltage required for the motor, typically the higher the voltage, the lower the required amperage or current.

The term also applies to equipment such as Air Conditioners which have an enclosed motor inside the compressor, as well as the condenser fan(s) etc.

Depending on the type of motor, LR current can be anywhere from 3 to 8 times the normal running current, also called RLA, or running load amps.

Does the circuit box have one side for neutral and the other side for ground?

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Asked by Wiki User

No, a circuit box is just a metal or plastic box that encloses the wiring and has means for mounting a cover plate. Most circuit boxes are for mounting outlets or switches, but one type (also called the junction box) is only intended as a junction point for wiring for multiple circuits and its cover plate is solid (no openings).

The wires that pass through a circuit box (usually together in a common plastic jacket) will be identified as:

  1. hot - black (220VAC service opposite phase hot - red)
  2. neutral - white
  3. ground - green

How much current will a 120 VAC wall outlet pass through a connected 20 ohm circuit load?

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Asked by Wiki User

The equation that you are looking for is I = E/R. Amps = 120/20 = 6 amps. This is one of the basic equations of Ohm's Law.

What are the advantages and disadvantages of mains electricity?

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Asked by Wiki User

Mains electricity is nothing but main source of power in an installation. From the mains the power is then branched out to different end usage.

What is the cable size for motor 15kw 440 volts connection?

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Asked by Wiki User

The current draw is about 27 amps. A motor feeder has to be 125% of the motors full load amperage. 27 x 125% = 33 amps. A #8 copper conductor with an insulation factor of 90 degrees C is rated at 40 amps.

What is field equipment?

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Asked by Wiki User

It usually refers to portable or mobile equipment that can be used on projects that are not associated with the buildings in which they are stored.

Can you use32amp circuit for a 15amp appliance?

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Asked by Wiki User

If it is a 32-amp circuit you can use any appliance that takes less than 32 amps. That includes a 15-amp appliance. All appliances fed from that circuit must use 32 amps or less in total.

Why do you use a 30amp breaker on a ring circuit and a 20 amp on a radial circuit?

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Asked by Wiki User

Answer for UK, Europe and countries running a 50 Hz supply service.

A ring circuit has two routes to each outlet, a radial has only one.

Where is connect input in rccb?

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Asked by Wiki User

An RCCB has 4 electrical connections.
If you look at the circuit picture of the device (usually on the front) you will see that these 4 connections are split into 2 live/hot connections and 2 neutral connections. Furthermore they are divided again so 1 live on top, 1 live on the bottom, and also 1 neutral on top 1 neutral on the bottom.

Electrically the device will function regardless of which side is used as the input.
Which side (top or bottom) you choose to supply the device from is up to you and usually decided by the ease of access to the terminals at the time of connection.
You may also consider from the point of using a busbar that it may be easier to mount the device on top of it (thereby feeding the device from the bottom), this is perfectly OK.

From a strictly technical standpoint the armature (the moving part) of a switch should not be live/hot if the switch is in the off position, however from a practical viewpoint (since the device works regardless of polarity) this is usually disregarded in lieu of mounting and wiring ease with respect to RCCBs, MCBs etc.

Summing up: As long as your supply cables (Live and neutral) are on one side (top or bottom) and your feed cables are on the other side you will not have any problems with the functioning of this device.

Lastly,

if in doubt, please contact an electrician.

Why ceiling rose is used in electric circuit?

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Asked by Wiki User

A ceiling rose is the name given to an enclosed terminal block which enables a suspended lamp to be connected to a residence's permanent wiring. It also provides a means of gripping the flexible cable to support the weight of the light fitting.

What is the effect of low grid frequency?

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Asked by Wiki User

Any equipment that is dependant upon frequency will be effected. Synchronous motors will slow down.