Electrical Wiring

A parallel circuit is one in which there is more than one current path. An example might be several light bulbs in a house, all of which provide a path for electric current. The advantage is that any of the lamps can be turned on or off without affecting the current flow through any other lamp.

A series circuit is one in which the current has only a single path through multiple components. An example might be two resistors, one after the other. Both will have the same current through them but they may have varying voltages depending on their resistance. Another example of a series circuit is a houehold lamp and a light switch. When the light switch is open, no current flows through it and therefore, no current can flow through the lamp either. When the switch is closed, current will now flow through the switch and the lamp.

The ground wire at the bulbs is black.

black

EHV lines are type of electrical lines commonly used for experimentation in physics. They stand for 'Extra High Voltage' lines.

There are 5 classes of fires (3 common and 2 specialty). These are common combustibles, flammable liquids and gases, live electrical equipment, combustible metals, and cooking media. These fires are then each classified into 5 groups.

For a single throw, double pole switch, each section is wired to the individual items to be controlled. For a double throw double pole (220) set up, both hot wires are run through the switch.

Benjamin Franklin, Alessandro Volta, Michael Faraday, Thomas Edison, Joseph Swan, Nikola Tesla and George Westinghouse. Others who contributed to bring the use of electricity to where it is today include Scottish inventor James Watt, Andre Ampere, a French mathematician, and German mathematician and physicist George Ohm.

An electrical fire in an automobile is usually caused by a short circuit. For example, If there are exposed wires somewhere, touching metal, that could start a fire.

It is the hard way finding out that the electrical circuit is still energized. It is much easier on the body if a tester is used to check for voltage before any work is started on any electrical circuit.

For higher current applications you would need a power transformer, for lower current applications you would need an adapter transformer.

Bandwidth is the amount of information that can come through. The frequency is how quickly the information can come through.

Watts are the product of multiplying volts times amps.

The formula for amperage is Amps = Voltage / Resistance.

As the voltage become higher so does the current that can flow through your body if you short across an electric potential.

Remember that 1 amp is equal to 1000 mA.

The following list is the tolerances that the body can stand.

Less than 1/2 milliamp no sensation

1/2 to 2 milliamps, Threshold of perception

2 to 10 milliamps, Muscular contraction

5 to 25 milliamps, Painful shock (may not be able to let go)

Over 25 milliamps, Could be violent muscular contraction

50 to 100 milliamps, Ventricular fibrillation

over 100 milliamps, Paralysis of breathing resulting in death.

Static Electricity is very useful in many things we use in our everyday life. For instance, Photocopiers use static electricity to give the image or text a charge. The toner and the image have opposite charges because opposite charges attract. Static Electricity is also used in the ink. It makes the ink attracted to the places in which the information we need to be printed on the paper not where its supposed to stay white.

To prevent the equipments from lightning strokes. Because the cloud is negatively charged at bottom it requires a zero or a positive potential to discharge, and it selects the ground (Zero potential) to discharge. If the Telecom Equipments are fed with positive the cloud will choose the low resistance tallest positively charged Antenna's to discharge, this could damage the entire setup of Telecom equipments. So the Telecom equipments are fed with Negative supply Voltage.

You cannot have 380 V between 'phases'. You can, on the other hand, have 380 V 'between lines'! '380 V between lines' refers to the voltage measured between any pair of line conductors in a three-phase system.

You start at the top left of the print and proceed down the page reading from left to right. Usually the schematic is laid out in the sequence of operation.

A fuse is a device used to keep electrical circuits from overheating is not a true statement. A fuse is used to protect the wire of the circuit from an over current being applied to the circuit. This over current could be caused by a couple of scenarios. Two non insulated conductors touching one another and creating a short circuit. Another cause could be an non insulated conductor touching adjacent grounded equipment. Whatever the cause the fuse will isolate the fault instantaneously.

A secondary voltage is created through induction.

a circuit is a round wire that connects through a battery into a lightbulb

High Rupture Capacity fuse.

Nuclear energy is stored in the nuclei of atoms, specifically in the form of a chain reaction that occurs when atoms split (fission) or fuse together (fusion). This energy release is harnessed to generate electricity in nuclear power plants.

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A1 is a termination point on a contactor it is an alseriery going to another point.

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