Electrical Wiring

It was a shocking discovery by William J. Newton and Morris Goldberg who invented the electrical switch. The switch was invented to prevent frequent electrical shocks caused by twisting two wire together to turn on the light.

There is no limitation of temporary or permanent repairs to electrical insulation. All that is required is that the splice have equal or a better insulation factor than that of the two wires that are being joined together. If it is an underground splice then that has to include the waterproof factor that underground wiring insulation has. Heat shrink over the overall taped splice will suffice for this type of installation.

To see if the motor is three phase or single phase look at the motor's nameplate. There it will tell you what the voltage needs to be and what system phase the motor needs to be connected to operate properly.

Yes, dissolved sugar is matter because it has mass and occupies space. Electricity, on the other hand, is not considered matter as it is the flow of charged particles and does not have mass or volume.

'Shunt' is an archaic term, meaning 'in parallel with'. So a 'shunt coil' is connected 'in parallel' with... With what, of course, depends upon what sort of device you are talking about. For example the field coil of a d.c. shunt-connected motor has its field winding connected in parallel ('shunt') with the supply.

1970

The "sw" is electrical terminology for the word "switch". A single pole switch is one that opens the circuit when in the off position and closes the circuit when in the on position. Individual switches that turn on light fixtures in your home are in the classification of single pole switches.

You can be shocked because that the wire is passing electricity and that its moving around. Your body has electricity in them and when touched the electricity are moved and you get shocked

In motor starters, this is usually done using contactors. Explanation of this can easily be done using a circuit diagram.

There are three contactors, the main, star and delta contactors-all these contactors can be the same type. There are many ways of wiring a star delta but here I will only give a generalized answer.

First, the main contactor and star contactors are energised thus the motor runs in star. After about 5 seconds, the timer which gets energized at the same time as the main and star contactors, switches its CONTACTS i.e the normally open closes and the normally close opens. This dienergize the star contactor and energized the delta contactor. Thus, the motor now runs in delta.

earth fault impedance test,very important to proper operation of protection system

then insulation tests in conduits

insulation test of switches

resistance test of cables.

polarity tests in switches

2 Amp

The cable can be run in various ways. Three common distributions are; in conduit, direct burial and aerially between poles.

Because if it is not connected to both it is not a full circuit and therefore if it is not a full circuit then the fuse can't protect you.

green is ground regardless of ac or dc

If wired in parallel then 4 ohms.

It depends on the power rating of the circuit but a common size would be 95 sq. mm up to about twice that. 11 kV systems are usually 3-phase 3-wire. Underground cables use copper while overhead ones tend to use uninsulated aluminium or aluminium conductor steel reinforced (ACSR) cables.

its a pizzo electro device.its made of metal and crstal quartz,more deepl electrical engineering or physics knowledge required to further deep understanding

Not usually. The primary current for neon tube transformers are not that high and can be added to existing circuits. Many of these types of neon transformers just plug into a normal wall receptacle. If it is a large neon sign it is a good idea to use a dedicated circuit for isolation purposed when servicing the sign.

Neon tube transformers are sized by the length of the tube. These types of transformers operate at voltages from 5,000 to 20,000 volts. If the length of the two tube sections are within the range of the transformers then two tubes can be connected together.

because you are switch the hot leg, so it can be turn on an off.

no

That you were able to ask this question. Without electricity, we wouldn't have many of the things we have now. A LOT of stuff use electricity to work.

Remove the motor from the system. Get the motor rewound at a motor rewinding shop. Replace the motor back into the system. While the motor is at the rewind shop find out why the motor burnt out. The first thing that should be checked is the overload protection. Make sure that is is the same as the motors full load amps.

Battery Operated Motor

If the circuit of the panic button is monitored for a break in its circuit, the contacts will be in a N.C. configuration. There will need to be a relay in the circuit that is kept energized by the buttons closed contacts. When the relay drops out, its N.C. circuit contacts will activate the panic buttons load. If the panic button has no monitoring features then the contacts across the button will be wired in the N.O. configuration. When the button is pushed the circuit closes.