Electrical Wiring

The purpose of a switch is to stop and start a current flow in a circuit. The stopping of a current flow in a circuit effects the load of the circuit by stopping its action. Resuming the current flow in a circuit also resumes the action of the load.

In North America the white neutral wire is never switched. This is because a split single phase secondary system is used. Opening a neutral could put two branch circuit loads in series with each other.

As long as the voltage insulation factor of the conductors are the same and they are of the same circuit fed by the primary side of the transformer's disconnect switch then yes the two feeders can be run together. It is not usually done though because the transformers feeders usually start at an MCC or splitter of one voltage and the load side of the transformer usually goes to a distribution point of some sort at a different voltage.

More information is needed to answer this question. Voltage, type of fan, horsepower of the fan or wattage of the fanareneeded to find what the current draw of the fan.

In electrical terminology it is called a conductor. On PC boards it is called a trace.

It is a switch that is activated by light levels. They are used in dusk to dawn sensors. Light in the daytime, through the switch, holdsthe circuit open. At night, with no light source on the sensor cell, the switch closes and is usedto bring the night light on.

This high a voltage is an industrial voltage. If you are concerned about variations in the voltage call your utility supplier to get them to check it for you. They can connect a recording volt meter to the line an it gives a print out over a 24 hour period. If that is not an option call a qualified electrical contractor and ask him to take a reading for you. A voltage of 480 volts is not a voltage that the ordinary layman should be opening panels and

getting into.

The centrifugal switch on a motor's start winding should open at 75 to 80 percent of the motors run speed RPM.

The two wires carrying a standard ac power supply are the live and the neutral. By convention one of the two wires is earthed at the transformer providing the supply. That then becomes the neutral and the other wire is the live.

A trade size hole for a 2-1/2" EMT conduit connector, the hole needs to be 2-7/8"

in diameter. A 3" rigid conduit can also use this size hole without the lock nuts falling into the hole.

I am taking this question to mean that you are making an installation using two wire cable that has a black and white in it. In this situation the white is not called a neutral. At the distribution panel end the white wire does not connect to the neutral bar. It will go to one side of a two pole breaker. the other side of the breaker will connect to the black wire of the cable. On the 230 volt receptacle end the two wires will connect to either side of the receptacle. Make sure that the cable wiring is rated to take the amperage that your plug-in device will draw. The last thing to do is identify the white wire as a "hot" current carrying conductor. This is done by placing black tape around the white wire. This is done at both ends of the cables white wire. This is done to ensure in the future that is someone else works on the circuit they will know that the wire is not a neutral conductor.In the market place there is a new cable that has no white wire in it. This cable is used for wiring baseboard heaters and has a different colour jacket to identify the type of cable it is. The internal wiring colours are black and red. This wire is used for all 230 volt circuits.

A loopback plug

The rack is used to hang laundry indoors. The pulley system is used to lift the rack to a higher elevation in the room where usually the warmer air is located.

In North America a two pole breaker will be used in the distribution panel for a supply of 240 volts for a 240 volt load.

First. You should not attempt this unless you are an electrician and KNOW what you are doing. Second: Ensure transformer is rated for 480 primary and 120/240 secondary. Third: See step One... But if you insist on doing it yourself, make sure your insurance is paid up.... On the Primary side of the transformer will be leads marked H1 H2 H3 etc. On the Secondary side the leads will be marked X1 X2 X3 etc. Look on the nameplate data on the transformer. It should tell you if it is rated for 480volts and should have a wiring diagram on it... If it does not, get one that does to ENSURE that you have the correct transformer.... I am an Electrician with BS in Engineering and 21 Years experience... If you seriously need help with this, email me sndemailhere@yahoo.com

A QP type breaker is made by Siemens for a Siemens distribution panel and should not be interchanged with Square D.

A Siemens QP type bolt in breaker will bolt into a SQ distribution panel but it is up to the electrical inspector to make the call as to it being safe or not.

Square D breaker types are QO and QB. You might be mistaking the QP for a QB

on the breaker.

The QO breaker is a plug in breaker usually used in home wiring

and the QB is a bolt in breaker. QB breakers are usually specified for industrial and commercial use.

It is a electrical code rule taken from the National Electrical Code book. It has to do with multi wire branch circuits.

No, all resistances in series connections are not the same. Different value resistances can be series together. The results of the resistances in series are always the same, they are additive.

A #6 copper conductor is rated at 65 amps. To connect to a 50 amp RV outlet you will need a four conductor #6 SOW 600 volt cabtire. The black and red wires go on terminals X and Y. The white wire goes on terminal W. The green wire goes on terminal G.

The term GFCI stands for Ground Fault Circuit Interrupter.

to 1 bulbs 1.5 and and if large florecent 3.5..

this is correct

On a wye connection all three ends of the phase winding coils are connected together and grounded. The other end of the three phase winding are connected to the supply voltage.

Any device that uses the generator to supply its operating voltage is electrically classed as a generator load.

Twelve volts is not a common three phase voltage. Assuming that this is a hypothetical question any 1:2 ratio transformer will do the job.

Rather common for electric fork lifts

very small ones use 12v (hand stackers,pallet jacks)

larger ones are 24v 36v or 48v

the original transformers on the chargers usually run from 480V

and the chargers are specifically designed for the battery

most chargers use half wave rectifiers in a star configuration

600A thru a .7v drop for a diode is 500w loss, full wave is 1000w

regulation is switched from the primary side since its easier to handle the low current

If the question means "two loads in one circuit" then the load currents have to be added together. The breaker that protects the circuit is sized for the total loading of the circuit. These two loads of course will be in parallel with each other. Find the wattage of the two loads if the amperage is not available. The equation is W = A x V.

Watts = Amps x Volts. Once the total amperage of the circuit is found select the correct wire size for that amperage. The breaker protects the wire size so then select the proper breaker for that wire size.