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Electrical Wiring
Ask questions here about proper wiring and electrical installation here.
4,935 Questions
How many amps does a 30HP motor use hooked to 480v 3 pH 60Hz line?
The electrical code states that a 30 HP induction motor at 460 volts three phase will draw 40 amps.
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I = 33.34 AMPS IF EFF.= 95% AND P.F.= 85%
Yes. this is commonly done. However, performance is better and costs lower if you use the proper diode for production devices. Absolutely NOT. For the same reason that capacitor cannot be added in series to withstand higher voltage. Not all components are made equally Supposed that you have two diodes rated at 100v add them in series makes 200v not quite if one leaks more then the other unequal voltage will results blowing them up. There is a simple solution add a parallel high resistor across each component to equalize the voltage then YES it is possible to add them in series
What do you feel and hear when you put your hand on our throat and say''aha''?
you can feel realy stupid and your friend hates you?
Can a clothes dryer be plugged into a regular outlet?
for USA, Canada and other countries running a 60 Hz supply service.
No - unless it is a very low power model, in which case it would already have a standard 120 volt plug on its flexible power cord - a normal clothes dryer cannot be plugged into a regular outlet. You need to use the right size 240 volt outlet that is connected to the right size cable and circuit breaker in your main breaker panel.
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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 are the disadvantages of Hybrid Fiber Coax?
- Cost - More expensive than Coaxial Cable, especially costly to rural subscribers due to long cables required.
- Reliability - Due to the huge number of users that a fibre will support, a train derailment, earthquake or other traumatic even can have catastrophic proportions.
- Skill Required - Optical fibres cannot be joined (spliced) together as easily as copper cable and requires additional training of personnel and expensive precision splicing and measurement equipment.
- Symmetry - Asymmetrical, not based on new interactive multimedia.
- Signal Quality - Is reduced as more subscribers use the network. Speed of transmissions also decrease.
Is plasticine a insulative material?
yes it can but you need now about filler ex talc or calcium carbonate
What is the operation principle of a twisted pair wire in transmission media?
Describe the basic construction of twisted pair wire?
What material through which electricity does not flow is called an?
Insulator, or insulation, or non-conductive material. Wood, plastic and ceramic are examples of non-conductive material often used as insulators.
It's a transformer that operates with AC current in and out. It's an ordinary transformer, with the term "static" used to differentiate it from rotating transformers, such as motor-generator sets.
How do you describe lightning?
Lightning is the occurrence of a natural electrical discharge of a very short duration and a very high voltage between a cloud and the ground.
What is the difference between voltage and signals?
That's a pretty good question. In computers a change in voltage level is usually the data signal. There are many industrial applications where a change in current is used as a signal. In fact ANY change in voltage or current can be used. Data signals are very weak (high impedance) compared to power supply voltage and currents.
How to build a Rotary phase converter?
A simple Rotary phase converter is just a motor generator set.
An electric motor running on the input voltage/current/phase/frequency. it drives a generator that supplies a different voltage/current/phase/frequency.
So an electric motor and an electric generator connected together mechanically, either on the same shaft, or via gears, constitutes a Rotary phase converter.
the above is incorrect, the motor/generator is the same motor, just one 3 phase motor is needed, it will run on T1 and T2, and put out L1, L2, and L3. You just need to know how to wire it up and what to do to get it to spin over on simple single phase 220, it will create three phase 220.
Resistors allow electrical energy to be changed to other forms of?
All a resistor does is use electrical energy, converting it to heat. so a 10 ohm resistor with 5 volts across it will dissipate 2.5 watts. this will come out as heat, ie, the resistor will get hot.
With the batteries in series, the alternator provides the same current, and therefore the same charge to all the batteries. The alternator can take no account of any current being drawn from the 12V take off point. Part of the charge current is being fed to the 12V load and not to the batteries. Therefore, the 12-24V batteries are being fully charged while the 0-12V batteries are being partially charged. Over a period of time, the difference between the charge levels will become more obvious.
Current electricity vs electrical current?
Current or "electrical current" (to distinguish it from current in a river) is the flow of electrons in a wire which can perform useful work. The current can be generated by a battery or a generator, or by other means.
Current electricity is not a commonly used term. "Current electricity" is the science of electric currents, and it means the same thing as Electrodynamics. Example: the Electrical Sciences can be divided into two parts: Static Electricity or Electrostatics, and Current Electricity or Electrodynamics.
